All depends on how the outcome of the body work looks. Today's topic is A-Z Sandpaper Grit and Primer Steps To Repair a Panel + Auto Body Q&A TALK! I'm going to draw out a car fender. Check the size of the block by sliding it into the empty mortise. Use a sanding block equipped with 180-grit wet sandpaper to further sand the body filler area. The primer/sealer will eventually level things out and give a uniform surface for the color coats. Use a spot putty over that , or a surfacer (a spray on high build undercoat)finish sand, and seal coat with epoxy, and apply topcoats. I use sanding blocks to maintain a flat and level surface. Trying to repaint my wheels, Im using filler primer which leaves a rough texture but when i sand it donw with 1500 grit sandpaper all the scratches show back up and shows through the base coat, Ive done a couple coats but nothing seems to be working. You dont want to apply bondo over paint you have to grind the surrounding area but first bringing the dent/massaging the medal to a close level to the existing medal is the first order of buisness. Durable and environmentally-friendly. I first tape the stencil to the surface. Apply polyurethane to the wooden legs. During this process of painting and filling, sand the surface of the cowling with 400 grit wet sand paper. Moisture is the a bad friend to bare metal. One of the steps involved in body work preparation before a car is painted is a system called "block sanding". Use 120-grit sandpaper to sand down any body filler used on the car's surface. How to fix rust on your car or truck Part 1 See disc. 7) Sand according to directions with 400 or 600 grit paper. Materials, substances and compounds volume to weight conversions. Typically it would be centered on the casing, but you may need to have it be wider on the outside of the door (toward the baseboard) to fill your gap. 15: Trim cut bottom to be flush with the top block using a chop saw. I will be using the Dura-block products, so I will get sandpaper on rolls. Installation: 1. You can find it in Walmart and just about any AutoParts store. This is only a problem if you wet sand your primer surfacer (which is the only right way to do it) because inevitably you will break through some places where it is high and when you do you now have bare bondo and water at same time. Feb 7, 2014- Explore homemadecute's board "Bondo", followed by 246 people on Pinterest. Another option, if the counter damage is spotty over the dishwasher, is to remove the small sections of flakey particle board and fill the small voids with the Bondo wood filler. I was thinking of two layers of brushed on epoxy (no cloth) then sand everything down prior to paint. But use that same kinde of product to use one hardener for example NOVOL resin and bondo. I am looking for something that can be injected into the sand that will clump it up and keep it in place while the jacking and rebuilding is done. Epoxy is the perfect material to make permanent repairs of rotting window sills, door jambs and exterior molding that are difficult to remove and expensive to replace. Painting a car is one of the most misunderstood parts of our hobby. Sand slowly and carefully so you don't accidently sand the laminate edges surrounding the patches. Epoxy is necessary for critical repairs, such as cracks in the hull. Installation: 1. When finished you should have a relatively even surface with all surface holes and pits filled. Ok, so you have the metal you want to work on down to bare metal and sanded with 80 grit. I like to hold it where I can put my fingers in the holes. They'll have materials and tools on hand for the job and will likely do it much better anyway. 4) Skim coat again with Bondo Glazing Putty. Create a stylish outdoor space by selecting this beautiful Sand Concrete Retaining Wall Block from Oldcastle. 100-200 grit sandpaper (or said paper wrapped around a sanding block. 4) you really need to sand with a flexible sanding block, or you will dig out the repair with uneven sanding pressure. The alloy wheels included on your Honda can need refinishing over time as they are exposed to road irritants such as salt and sand, as well as excessive brake dust build-up. [ Heinous Honda] [ Suspension] [ Drivetrain] [ Miscellaneaous] [ Racing] 5-pt. All high end paint jobs go through the block sanding process which insures that excellent flat finish!. How to fix rust on your car or truck Part 1 See disc. A neighbor was helping me sand/prep my hood and grill for paint this weekend. Once you have your surface evened out with where you’ve applied bondo, then sand the entire piece with 220 grit sandpaper. Starting from the original valley state in 2015 (T1), the topography in Bondo has been prepared to allow for the 400’000 m3 of material arriving in summer 2017. Eastwood Company 193,678 views. Once the final primer coat has been sprayed on, it is time for the finish coat. Spread your bondo on then block. And hopefully you are using a sanding block for all of the flat surfaces to keep them dead flat. Durable metal filler for fast, permanent repairs. It cures in an hour. can be generic, cheap, is sold in aerosol cans. I found 2-part Bond shrinks slightly on wood. That’s because when Bondo is used right, it can fill dents and make a car look good as new. I have used Marine Tex to repair sand holes in auto block castings. So yes there is different colors from different brands. When you are sure you are filled and properly cured, sand down the area for the surface you are looking for. It is a thick plastic paste that is spread over the affected area, then sanded down to a smooth finish. Conversely, if there's an area you don't want Bondo to stick to, apply a release agent (see tools and materials) or use Scotch tape or wax paper. At least sand through it to the primer, then spot in the flaws. Press the Bondo firmly over the area, and don’t scrape down too deep. u/Toronto_F_C. Sand past the edge of the filler to create a smooth transition. Generally, if paint will stick, so will Bondo. Scratches, chips and other imperfections are just about unavoidable, but a careful repair job can be almost totally invisible. I want a more authentic raised detail and something that wont come off over time. See more ideas about Furniture repair, Wood repair and Furniture fix. Remove the sanding dust with a clean cloth. It comes in a tube. They're DIY friendly, so you can prep your trim yourself and still get professional-looking results. Stucco is one of the most durable wall surfaces available, but because of its rigid nature, stucco can develop cracks and holes over time due to settling and impact damage. You may not need any filler but if you do fill the edges and finish off like we did in step #1. Use a drywall knife to apply joint compound over the patch and smooth it out. But the modern stuff, used right, is great. These sections had been reinforced or completely replaced with fresh metal, and so the stuff was difficult to shape. See 6 Ways to Plug or Fill Pocket Holes. Long Sanding Board and How to Correctly Sand Auto Body Filler so that all Body Panels are left Perfectly Smooth and Flawless. The weather was beautiful this weekend, so I washed, clay barred, and waxed my Rabbit. THEN do your blocking. When finished you should have a relatively even surface with all surface holes and pits filled. I'm painting a full face helmet but I had to cover the holes in order to protect the foam from the paint vapors. More Bondo and my son helps block-sand filler Throughout the course of this project, I will do what I have learned in all the books and videos I’ve used to dip my toe into the world of bodywork: I will call any plastic body filler by the name Bondo. Wash off again while degreasing the rest of the stock. also, solvents generaly dont harm bumpers these days, but the bondo wont be affected by them either. This is a super important part of painting and refurbishing furniture, and can make or break your finish!. 4) Thicker areas of the application dry last-make sure it is totally dry before you sand. It is sitting on top of a concrete footing. The current industry standard is to epoxy prime then apply filler. 4) you really need to sand with a flexible sanding block, or you will dig out the repair with uneven sanding pressure. i just wrapped my back dash and resined it letting it dry over night then gunna hit it tomorrow with some light sanding i am thanking of putting. These fillers are often wrongly referred. I spent about three hours laying down more bondo and block sanding most of it right back off. that looks like quite a few aplacations of filler, did the shop try and straighten the metal first? or just coat the metal with bondo an sand away, coat, sand? was the body in REALLY rough shape to begin with? could you post some before pics that looks like alot of bondo, but if it's really thin when their done you'll be o. You never block just one coat of primer. Allow 15 minutes to dry, depending on the temperature and humidity. Here’s how. Install a Prestone flush kit and using considerable water pressure, back flush the system with the thermostat removed and thermostat housing installed. Lightly sand the scratched area with #240 grit sand paper. Eastwood with its videos, tech library and online forums want to help you become a better body man. Maybe they did it that way because they are always behind schedual and always in a rush to get the car finished. Using sandpaper with your hand alone allows dips and hard edges to appear on the surface. The holy block has holes on one side and flat surface on the other. 3m Pack 03209 Tubing Sandpaper 03216 Adapter Kit Vacuum Clean Block Sand (30. sand the area with rough sandpaper like 60 grit. Another way could be 80 grit, epoxy prime then spot puddy and sand with 100 120 or 150. It sands very easily when dry. Bondo works great. Lightly wipe down the entire area with a clean cloth dampened with acetone or rubbing alcohol. The further out you work your repair the cleaner it will look. When block sanding, don't just saw back and forth. Another option, if the counter damage is spotty over the dishwasher, is to remove the small sections of flakey particle board and fill the small voids with the Bondo wood filler. If you are looking. Sand in a cross hatch pattern, keeping the board in line with your surface. For small spot repairs I like a 6" or 8" block to keep the repair covered and true. Bondo will sand the best, but be careful not to sand too much. 32 cm) layer over the damaged area. Classic Car Restoration: How To Block Sand Bondo With Air Tools-Part 1 - Duration: 13:41. Due to the mass production process, this item may have imperfections. Hey, it's Tony with another live stream. The pliable rubber block is designed to comfortably fit your hand and to keep sandpaper flat against automotive surfaces, helping ensure uniform sanding performance. Then go over the seams and the screw holes with bondo. The clay can be mixed with sand (not included) and cement (not included) to produce mortar and stucco. I mix up my bondo (which can be bought at any Auto part store) with the hardener. I recommend a sanding block. Then coat the rotted door frame area with wood hardener. We discovered the same type of product in an easy-mix package from Bondo. 3M Filler / Bondo Body repair accessories including fiberglass cloth, fiberglass mat, spreaders,mechanical dispensers and products such as 3M™ Dry Guide Coat which enhance finishing capabilities. Epoxy is the perfect material to make permanent repairs of rotting window sills, door jambs and exterior molding that are difficult to remove and expensive to replace. This prevents from digging grooves and the cross hatch pattern offers good adhesion. I sanded way too much bondo off and then had to add more bondo. I have a car with couple of dents which I filled with bondo and sand it down with 80-grit sandpaper. 5 oz mat on it. I usually work better at multiple tasks than one so I coated several several patterns at once. Hey, it's Tony with another live stream. Used to sand down existing paint to be repainted. sand with 320 and then ultrafine and you are ready for paint. even at 30 degrees Fahrenheit, he would have to really try to hurt the plastic bumper. Dig out any rotten wood. ( Both can be purchased at local auto parts stores for under 20$) Hard Block. Use pliers to bend and break off. Sand the patch with an 800-grit sanding block. This is one of the free auto body & paint training videos we have on YouTube. How to Repair a Dent with Bondo. Remove any dirty or stained surfaces with an abrasive powdered cleanser and scrubbing sponge. I wanted to buy Durablocks, I needed to buy sand paper those long ones sticks to Dura block. You want to be able to concentrate on making the panel FLAT not fighting with gummy resin, sand scratches and the like. This sanding block is a little smaller that I had expected. Use 120-grit sandpaper to sand down any body filler used on the car's surface. had alot of little bondo spots mostly of inperfections in the body and some minor dents. I then finished with 220 to smooth the area out. Note that I use the paper wrapped around a piece of wood to make a flat sanding block. Sand the damaged area with medium-grit sandpaper, following the direction of the wood grain. Is this sanding block ok to sand down the bondo? Close. Once the wood filler is applied and sanded, it can be painted or stained. I've seen way too many repairs on metal doors using Bondo or other composite fillers - get the Sun shining on them just right, and there is always a noticeable lump. Scrape away crumbling and rotted wood with a wood chisel. Mist water from a spray bottle on the metal before sanding to lubricate the sandpaper and add more water as. After painting your vehicle you can use 1000 grit sandpaper and wetsand out dirt then 1200 grit can be used on the entire surface before buffing. Moisture is the a bad friend to bare metal. Re-prime with primer surfacer and sand with 320 or 400 grit to smooth it out. Use a sanding block and you will quickly reveal any high or low spots in the body work. How to fix rust on your car or truck Part 1 See disc. Remember to. Sand the fiberglass using a coarse-grit sandpaper. It's best to sand with a flat block to get a smooth, level finish. The problem is that because poly is made up of a larger Styrene (which will condense with time because of the larger practicals) and most major brands primer/surfacers are made of limestone and then most use talc as a filler. Bondo works great. Note that I use the paper wrapped around a piece of wood to make a flat sanding block. 6) Prime with a sandable automotive primer. If some damage is present, repair any chips and cracks with a patching compound appropriate to the wall material, such as Liquid Steel or Bondo. ST Blade Fuse Block - 12. Epoxy is the perfect material to make permanent repairs of rotting window sills, door jambs and exterior molding that are difficult to remove and expensive to replace. You can find it in Walmart and just about any AutoParts store. How to use Body Filler on Repair Panels How to blend in a new body panel with filler and block sanding for a perfect paint job (Bodywork for Beginners Series) Written by Les Brown — 2010-07-25. With over seventy specialized products and 50 years of experience, you can trust us to help you with your project. I like using a red scuffing pad in all areas where the block will not work, for example the edges. Frequently asked questions about urethane primers Automotive undercoats, primers, sealer and body shop supplies available to order online. All high end paint jobs go through the block sanding process which insures that excellent flat finish!. that way you are sanding everything. I started playing around with raised bondo stencils because I dont care for wood appliques. If not, it may be necessary to repeat this step. For refinishing, patching and general repairs to concrete/masonry. Finish these surfaces as you would for any body panel and sand them for a seamless finish to show off that new paint! Priming and Painting For small pieces like this, you can either use an airbrush or a rattle can for your valve cover restoration project. The idea in using a primer surface is to build a layer of primer as filler material on the surface of the body, and then sand the surface back in a way that allows the primer to remain in the lower areas, bringing the entire body up to an even, smooth, and level surface. Whether you're filing in a crack, repairing a section of concrete, or pouring a whole new layer over an existing layer of concrete, getting the new concrete to adhere to the old layer can be difficult if. Search site: MY ACCOUNT. 3M™ Rubber Sanding Block 9292, Open Stock, One. As the masonry is installed around the frame, pour or trowel a small amount of grout into the frame. GO EASY with the stuff! It goes on deceptively easily, but you have to sand off any surplus! It is ALWAYS easier to put on another light coat than to sand down half an inch of pink granite. I start with 60 or 80 grit sandpaper to remove the texture left in the Bondo from application, and to start leveling the patch of Bondo with the surface of the lino. Automotive filler is often misunderstood. You will squeeze out a two inch long string of the hardener, for a plop of bondo about the size of a large plum. 7) Sand according to directions with 400 or 600 grit paper. Covering the holes was next. The primer/sealer will eventually level things out and give a uniform surface for the color coats. 12: Rout 1/2” round over on four top edges of the top block. overcoat with epoxy primer--this seals the bondo. ) Sand all wood around entire house and vacuum the debris. This will be what prevents the Bondo from adhering to the project surface. You just add water and it is ready to go! It is the ratios of the ingredients that change its strength and drying time. When dry; carve (#226 blade) to shape and then using the fine side of the of the SB280 block block sand to shape then use 150 and 320 sand paper. Sand the flexible repair material using a hand block and a 150 grade abrasive sheet, or a dual action sander at low speeds and a 150 grade abrasive disc to avoid excessive heat. I have heard polyester resins soak up water and this repair is on the joint between the vertical and horizonal surfaces. Or fiber filler. I have a car with couple of dents which I filled with bondo and sand it down with 80-grit sandpaper. This is the most important step to a great paint job, so do it right and don't rush it. You need to keep it as high as the surrounding metal, so use the metal as sort of a straight edge that you run the block or board off of. I had to use 80 grit on a sander just to break the top coat…then guide coat then hand sand with long block Covert1 2018-05-03 21:17:34 UTC #2 Your pic didn't come through but my experience with Eastwood was the same as yours. Sanding between coats of primer will just extend how long it takes to complete the phase, while sanding at the end of the primer step yields the same results. The idea in using a primer surface is to build a layer of primer as filler material on the surface of the body, and then sand the surface back in a way that allows the primer to remain in the lower areas, bringing the entire body up to an even, smooth, and level surface. Doing this before the Bondo fully cures makes for easier going. I would spray two coats of primer over the bondo, and then spray two more coats over the entire car and also the bondo areas. Bondo fills the crack but has only minimal strength under tension, so it cannot really "bridge the gap" of a crack. For the novice who wants to learn more about car maintenance, this is the perfect tutorial. HOW TO FIX PLASTIC SCRATCHES, GOUGES AND BREAKS PART 1: ATV & UTV,Dirtbike : Fenders, gas tank, side panels the works. Sand in a cross hatch pattern, keeping the board in line with your surface. Once the body filler is block sanded with (150 to 220) it is ready for primer. seems harder and allot more work to sand, has allot more shrinkage then decent fillers dynatron, i wanna say its by bondo but its like their topline stuff. If finished wood, then wood filler of the same stain color e. also, solvents generaly dont harm bumpers these days, but the bondo wont be affected by them either. REMEMBER to allow the fiberglass or Bondo (body putty) or lacquer putty to cure before you put another material on top (like Bondo over the fiberglass or primer over the Bondo) as you need to let the gasses escape before you seal them into the layer that you placed. 02112 lb/ft³). Big long, flat 'x' s. I am looking for something that can be injected into the sand that will clump it up and keep it in place while the jacking and rebuilding is done. Welcome to The Woodcarver's Cabin. i used bondo on my first frame, but im re doing my bike so i think i might try metal filler for all the new mods, the only problem i have with bondo is the fact that i could see through the paint and could see the bondois metal filler going to do the same thing or was it just because i used spray paint? which one would you use, and any bennys or draw backs of using matal finner, o and what. After it dries, sand lightly, wipe away dust and repaint the entire area. Be sure to sand "with the wood grain" on the front, back, and sides. Classic Car Restoration: How To Block Sand Bondo With Air Tools-Part 2 D. Fiberglass or aluminum filler should always be added to an area that is welded. How To Block Sand Car Panels - Primer-Surfacer -Dura-Block & Soft Sanders with Kevin Tetz - Eastwood - Duration: 6:06. This sanding will scuff the surface so that the glazing putty will adhere to the old paint. It's important to use a flat surface to keep the finish as flat as possible. How do deer adapt to grasslands? 436 want this answered. If the casings are rotting, as here, replace them, too. Remember to. Still had to sand of course. html?utm_source=youtub. A: This is our most commonly asked question. If it fits, great! Attach it as you would other trim, caulk, and finish. A few common problems when using #bondo is over grinding the metal on thin metals which thins and weakens the metal. Let it dry and sand (LIGHTLY!!!) with 320 grit sand paper and a wood block. Use the 400 grit paper to block sand and remove any primer runs then 600 grit to provide a good surface for the paint. For advice on how to repair a bigger hole, read on!. At this point sanding by hand is a snap starting with 100 grit paper and a hard rubber sanding block. the body of your vehicle, you can use two-part body putty Bondo, sand paper and primer to repair the spot before painting it with a suitable car body paint. Concrete mix is similar to mortar mix (the stuff I used to pour the floor of my shower) but it is made up of sand and cement only. The process is to put down a thin coat of auto body filler along the seam, press in a strip of drywall tape, run a taping knife along the tape to force out any extra auto body filler from underneath the tape. After it sets up I go over the entire surface with the auto body filler and then sand everything flat. Once cured sand down with 40 grit sand paper with a block, then follow with 80 grit and further sand with 180 grit. So here is a totally random little project I tackled. Sand till the surface is level and the edges of the filler are starting to feather to the metal, but it's still a little "high" feeling. I use sanding blocks to maintain a flat and level surface. 6) Prime with a sandable automotive primer. I noticed the metal comes with an oily film. Body Filler and Sanding. The best way to cut an insert opening in a router table is by guiding your router with a flush trim bit against a template made for the insert plate. It went real fast. (3) Hail Damage Repairs – Old School (Some dents and thinner metal are not a candidate for this repair method) This method uses heat to raise the metal. I shot some slick sand over some filler and a 2k aerosol epoxy on my quarter panel today and had trouble figuring it how to mix it. UPDATE: I hate to admit it but you were all right from the getgo. I first tape the stencil to the surface. ♏ build up bondo glass on wood : Change Your Life, Read This Article Concerning Wood. These sandpapers are used for the main body work process when cutting body filler (Bondo) shaping, feathering and final sanding when prepping for paint. Avoid cutting into the tape, as you will ruin your line. We used Bondo to fill in the pocket holes and wood filler on any large spaces. Fill in low spots with a bondo / filler skim coat and repeat block sanding with 36 and long block. After you sand with 40 grit then 80 ytou can prime. As the thread title says, I would like to fabricate a piece of interior trim out of fiberglass; I would like to make a custom mount for a ScanGuageII w/ the material, is it possible for a "newbie" to attempt?. Sand and smooth the patch with a course-grit sanding block. then you sand and use spot putty to finish it off. Trying to sand on filler like this. So here is what I do. It block sands much better than Bondo. Apply painter's tape to everything you don’t want to paint, including your sink, faucets and backsplash. It is still being used today because of its. Scrape away dust and debris from the hole and position the new section of drywall in the hole. Let it dry and sand (LIGHTLY!!!) with 320 grit sand paper and a wood block. The block is toast, found water in the oil. Sanding is the unsung hero of any project with wood. Mix up two-part automotive filler. I always put the bondo on real heavy, then sand it with a belt sander till it's down to about the same level as I want it, then I go with the 40 grit on a block till it's flat, and work up to 150, then do the spot putty. This product comes in a ready to use cold formula, as well as a Hot melted Formula. Allow 15 minutes to dry, depending on the temperature and humidity. This prevents from digging grooves and the cross hatch pattern offers good adhesion. The background for this block is one of my favorite Primitive Gathering prints. I had a sanding block like this before, but lost it, so was very pleased to find this one. Prepare the pre-mixed concrete according to the directions. KILZ will actually penetrate the compound and make it a very strong and durable surface. It can take a long time, and the results are subtle: Sanding wood does not transform your workpiece in the way that cutting it to size does. A sanding block is easier to maneuver into tight spots than an orbital sander, so this step may not be necessary. Excess putty near the hole will come off with a sanding block (and if you don't use a block, that can also promote divots) - since you specified that you are painting over, filler beyond the hole should make no appearance difference if it's allowed to cure and sanded flat. Use 120- to 180-grit sandpaper or a sanding block and move it back and forth over the surface. We will continue to add more of your questions as needed. Also, if you lay a heavy coat of Prep-Rite on, you can block it out with 220. Now comes what will probably be the single most time consuming part of working on this car: Block Sanding. Primers aren't going to remove or hide imperfections or lumps. Grab a sanding block with an 80-grit abrasive sheet and begin smoothing out the completely dry filler. primer it very good with hi-build gray and sand it. But the modern stuff, used right, is great. But, you want a smooth surface. Fiberglass Repair Tools Fiberglass Resin Repair. 3M applies science and innovation to make a real impact by igniting progress and inspiring innovation in lives and communities across the globe. Gluing stones together requires a strong adhesive suitable for the surface -- a jewelry adhesive may work well for small projects, but a large project with heavy stones calls for another product, such as a construction adhesive. Eastwood with its videos, tech library and online forums want to help you become a better body man. Even if you used lead you would still have to use a small amount of filler. I've seen way too many repairs on metal doors using Bondo or other composite fillers - get the Sun shining on them just right, and there is always a noticeable lump. Check the size of the block by sliding it into the empty mortise. Once you’re done rasping, block it out by crisscrossing it on both ways. They have the body down to bare metal. In this video Scott goes over the basics of block sanding body filler. Block sanders are just the thing to make sure that flat, straight body panels stay as flat as the great plains and as straight as a drag strip. NFM cannot provide service or exchange as a result of manufacturer’s imperfections. now i can stand my big _ _ _ on the bed with out it flexen. Tip: Mix only the amount of resin and hardener you need for the job. For advice on how to repair a bigger hole, read on!. "How to Fix a Burn Mark in a Butcher Block Counter. The further out you work your repair the cleaner it will look. After the second coat, I use 40 grit lightly to take down the large 36 grit scratching marks. Maybe they did it that way because they are always behind schedual and always in a rush to get the car finished. For this reason, it works well for stacking if you need to correct an area that you didn't get perfectly flat and need a little more filler. 485 Likes, 5 Comments - CHRIS MAGENO (@mageno_kustoms) on Instagram: “Cut, weld, grind, bondo,sand,block, then we will see what happens”. However, sanding by hand with a long block sander is best and will get smoother results. Used to repair most flexible plastic parts, including bumper covers and other plastic body panels. Remove the sanding dust with a clean cloth. If your repainting project is just a facelift for the cabinets, you don’t need to sand and paint the inside of the cabinets; mask off the interiors with painters’ tape for a clean finish and sand only the. To paint paneling, sand lightly, clean and prime with stain-blocking primer (oil or latex). 4) Skim coat again with Bondo Glazing Putty. Then, cut down to probably a 320-grit to get it nice and smooth. Any holes that are present due to rust must be patched with sheet metal using a mig welder. Bondo Fiberglass Resin Repair Kit Instructions >>>CLICK HERE<<<. A second application may be necessary if the crack filler settles into the crack and you may need to pre-fill the crack with sand up-to 1/2" below the pavement surface prior to applying the crack filler. The Bondo Bumper and Flexible Part Repair kit did not work for me.