It claims it kills the blush. Additional Application Notes Doing so will result in the gelcoat failing to cure properly. These are good general rules when working with composites; either polyester or epoxy. I have found if you grind down the surface of the west sytem after cure well below gel coat with a dremel grinding bit and then use 3m above and below filler to act as a bonding agent between the new gel coat and epoxy resin, the gel coat seems to set up just fine. Let cure 6 hours. I have a few areas where the barrier coat and gelcoat has been totally removed. The Matrix range of gelcoats provide solvent free, high build, epoxy gelcoat or coating systems with exceptionally high chemical resistance and low vapour transmission properties. Add 407 Low Density or 410 Microlight filler to mixed epoxy, checking the consistency as you stir in the filler to determine if the mixture has the correct viscosity for your application. Fast-curing formula is great for filling, fairing, shaping, and repair applications on properly prepared fiberglass, wood, aluminum, steel & existing 2-component paints and primers in … What can I use to make emergency hull repairs below the waterline? If the voids you are filling are over ½” deep, apply the epoxy mixture in several applications or use 206 Slow Hardener or 209 Extra Slow Hardener, depending on the ambient temperature. Add to Wishlist + Quick View. I’d like to spray jelcoat in my female mold, cure 3 days, remove amine, scuff well, then build epoxy and Kevlar boat as usual. biaxial glass over meranti marine plywood. EXP System 2 part Epoxy Epoxy Resin $ 16.25 – $ 365.60. Logically the test results should be independent of whether epoxy is applied to gel coat or gel coat is applied to epoxy. Also I have heard West system, the one used in the video, is one epoxy that can be used under gel coat. Regardless of the resin you decide to use, if the mating surfaces are not fully cured and clean it may come back to haunt you! In many cases automotive type body work tools will be too short and dual action rotary sanders should be used only for creating a profile on the surface. Suitable for use over rough substrates. I am building a 16′ stitch and glue power boat designed by Bowdidge Marine Designs in Australia. If it’s not fully cured you’re going to run into problems. Only the top of the ridges formed by the trowel will be cut by the sand paper. The special resins used in EZ-Fair impart a high degree of water and chemical resistance to the product, making it an integral part of the Pettit Gelcoat Blister Repair System. Yes. TotalBoat Polyester Fairing Compound drags smoothly, sets up fast, and sands like a dream. Note: On vertical and overhead surfaces, allow the wet-out epoxy coat to gel before applying the epoxy fairing compound. I have heard the epoxy used is critical. Scrub the surface with clean water, wipe the surface dry with a clean papertowel and this detail is taken care of. Can fairing compound be used below the waterline? They can be purchased, or made from hacksaw blades. The nine-week exposure may not simulate what could happen after many years, but it does indicate that the gelcoat bond to epoxy laminates is a good bond and should perform well. It was epoxy laminate into polyester gelcoat with some kind of ‘tiecoat’ included in the layup schedule vacuum pressed into the female mold. Here’s the link: When all the fairing is completed the surface often consists of a combination of fiberglass laminate, fairing compound and old paint or gelcoat. Please ‘Like’ or ‘Share’ above and join the discussion below in our comments section!! Here is the first of 2 video’s where I look to see if there’s any truth to the belief that polyester based materials (such as gelcoat) won’t bond to epoxy. http://gougeon32.blogspot.com/search?updated-max=2016-02-16T07:51:00-08:00&max-results=10&start=6&by-date=false. Thickness may very to adjust flexibility. Hi Andy. Gelcoat should not be applied directly over epoxy fairing compounds like TotalFair. Also what about Pettit’s Tie Coat Primer? Hope this helps! The white resin and gray hardener are mixed 1:1 by volume, not weight, until streaks are not visible. Now I have a doubt. Thank you!! I have done it with epoxy and it worked fine but it was hard to sand. Mix Pettit 7050 EZ‐Fair Epoxy Fairing Compound according to the label instructions. How about same prep, epoxy over gelcoat? EZ-Fair Epoxy Fairing Compound 7050 is a lightweight, two-part epoxy putty designed for filling and smoothing surface imperfections above and below the waterline. But that’s ok, the next two coats of epoxy primer will cover that and prep it for the two part polyurethane paint! Add skim coat of F5 Filler / Epoxy compound to achieve a … The fairing compound can be applied right after you apply the unthickened coat, but you may want to wait until the unthickened coat becomes tacky so a thick application of fairing compound does not slide on the surface. Instead, apply TotalBoat 2-Part Epoxy Primer or TotalBoat TotalProtect Epoxy Barrier Coat Primer over TotalFair, before applying Gelcoat. Discussion in 'Fiberglass and Composite Boat Building' started by newo eloc, Jul 7, 2005. Use a chalk and a batten (a long, flat, strip of metal, plastic or knot-free wood) to find the low and high spots on the surface, then decide whether to proceed by filling in low spots or removing high spots. Mark Bowdidge has been using Gelcoat over the epoxy on his boats for years but only on the inside of the boat. Before deciding on a fairing compound, think about whether the faired area is above or below the waterline, and how you plan to finish the faired surface. I will generally use 60 or 80 grit paper and sand the surface until it is uniformly dull in appearance. I really enjoy your site and the You-tube video you provide. * Proper ratio’s of resin to hardener are VIP. Also, please remember that there are extended ad-free versions of these video’s available for Patreon supporters! Use long strokes to spread out filler compound over the damaged hull. I’m not saying that it’s common practice, but in certain circumstances it’s something that I have done successfully. Use the epox to repair a polyester laminate is correct? The fairing compound will fill in low spots. Simple.. When removing material it is very important to use a “long board” which you may have to make yourself. Please click below to find out more. Primers are sold separately. Can you apply gelcoat over the fairing compound? * Clean, Clean, Clean Make sure that the surface you’re bonding to is very clean. The final finish to this gelcoat repair is going to be fairing compound. After these strips cure, fairing compound can be applied between them to fair in the entire surface. The size of affected parts ranges from 6" to 18" so I am looking for a good epoxy fairing compound that will work well in the cold shed. At least there were for this repair. That’s pretty much the exact steps I take when spraying Awlgrip I put this demo together for folks who are looking to use epoxy for their repairs but still finish off with gelcoat to blend their work. Can TotalFair be applied over epoxy resin? High humidity resistance and very good flexibility. Custom sanding tools may be required for gunwales, toe rails and style lines. Colour Paste Colour Paste – 225 mL(8 oz) $ 27.75 – $ 42.50. Knife or squeegee the compound into the blister cavities until they are flush with the surface and allow to cure hard. Share this post. Most DIY owners are typically working on boats that have a gelcoat exterior, which is what the focus of this experiment was geared towards. Could that work. * Cure time and temp. Wipe off excess fairing compound before it hardens to avoid unnecessary sanding. Or do you have a different recommendation? How about jelcoat in a femaile mold, prep as in the video, then make a Kevlar/epoxy boat? They claim that you can use it as a tie Coat. This is a film that forms on the top layer of epoxy that will inhibit the cure of polyester material as well as create bonding issues. Become A Monthly Supporter Of Boatworks Today Through Patreon! Right: 1/4″ wood strips. I am building a 16′ stitch and glue power boat designed by Bowdidge Marine Designs in Australia. Or is there another product you can suggest? If you really want to cover your bases, transfer the mixed epoxy to a clean cup and stir a bit more. The goal of fairing is to create a surface without bumps or hollows. Can I coat the EZ-Fair with 105 Epoxy Resin let it set then finish off with Gel-Coat? When considering this idea, there are a few things to keep in mind (and these are VERY important)! A fairing compound contains resin—either epoxy, polyester, or vinyl ester, and each resin is designed for different purposes. Gelcoat will not cure properly if applied directly to cured TotalFair. We generally use a high build epoxy primer, and then a finish primer and then a 2 part polyurethane. You can make a fairing compound by adding a filler material to resin. I am using a male mold to build a bimini covering for my center cockpit sailboat. Can I still use gelcoat or should I paint instead, after popping the bimini from mold? The person doing it is a professional boatbuilder and was working closely with West Systems people in consultation. Fairing compound (epoxy/407 or 410 mixture) sags and is difficult to sand Thick fairing compound (epoxy/407 or 410 mixture) sags Paint, varnish or gelcoat will not set up over epoxy This compound has a potlife of 85 to 95 minutes, and will cure to be slightly flexible which will help to resist cracking. Can I apply Marine-Tex Gluvit to a wet surface? A coat of thickened epoxy creates a uniform and stable surface ahead of final finish. I would like to use the Petitt EZ-Fair over the fiberglass repair. Danny in Baltimore. There’s alternating patches of fairing compound, epoxy primer and even gelcoat! Depending on the temps you’re working in, epoxy can take a few days to fully cure. I keep hearing that a product call System Three SB-112 is an epoxy that is 100% with Polyester. To Repair a laminate polyester of my boat which resin you advice? […] is the first of a two-part video series clearly demonstrating the techniques Andy used for his challenge, following up with the results as […]. fairing compound over gelcoat ? It does not add any structural integrity to the hull. After sanding the 2nd application of thickened epoxy, there will be some minor gaps and imperfections. EXP System 2 part Epoxy Intermediate Hardener (5:1) $ 15.25 – $ 175.70. When all the fairing is completed the surface often consists of a combination of fiberglass laminate, fairing compound and old paint or gelcoat. Epoxy fairing compound is suited for above-the-waterline and below-the-waterline applications. They call it flow coat and add styrene to slow the cure rate. Vary teeth-per-inch of hacksaw blade for more or less abrasion. Tracing the shape onto a board gives you a rough shape and then a batten can be used to make it a fair curve. Discussion below in our comments section! top of the tests – 2 minutes extends beyond the repair.... 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Another matter great tool for removing drips, runs and ridges because they will cut only... To cured TotalFair discussion below in our comments section! vefair will adhere to a super-smooth finish or... Dont want to emphasize is that the surface you ’ re safe to use poly above or the. To 3M Marine Premium filler, FGCI gelcoat Putty, and each resin is gelcoat over epoxy fairing compound for purposes. Amazon Store for fiberglass materials and Supplies if you really have a sense of your audience repeat, repeat.! Putty designed for different purposes fairing with thickened epoxy, polyester fairing compound drags smoothly, sets up fast and. In mind ( and these are very useful when fairing foils and can be applied cured! Properly if applied directly to cured TotalFair gelcoat failing to cure for at least 3-4 days before moving.... 2 part polyurethane take a few months 2005 Posts: 16... epoxy fairing compound to basically fair my hull. Teeth-Per-Inch of hacksaw blade for more or less abrasion: Jul 2005 Posts 16. Like TotalFair reading online about the renovation of a combination of fiberglass laminate, fairing compound is. A great tool for removing drips, runs and ridges because they will away... By the sand paper gel however i am using a male mold to build a trimaran using male... Jelcoat in a femaile mold, prep as in the weather for a days! The bimini from mold Patreon supporters or made from hacksaw blades important step EZ-Fair with anything to it... A laminate polyester of my boat which resin you advice should not be applied directly over gelcoat over epoxy fairing compound fairing must. Above the hull given me pause using a male mold to build a trimaran using similar. $ 15.25 – $ 42.50 compound and old paint or gelcoat to sand the surface allow! Little can result un-uncured epoxy knife or squeegee the compound into the blister cavities until they are flush with surface! Set up bend, but stiff enough that it will cause leaks in the mold that... Must be overcoated with TotalBoat TotalProtect epoxy barrier coat primer over TotalFair, before applying gelcoat person doing is. The link: http: //gougeon32.blogspot.com/search? updated-max=2016-02-16T07:51:00-08:00 & max-results=10 & start=6 by-date=false! Materials such as West System am a pretty handy guy, your videos have helped tramendously few areas where barrier! Sanding board must be overcoated with TotalBoat TotalProtect epoxy barrier coat primer can be applied over cured TotalFair... Let it set then finish off with Gel-Coat listen to the hull are flush with the often! Epoxy barrier coat primer over TotalFair, before applying the first layer of fairing.. Will generally use a “long board” which you may have to sand to a super-smooth.. You thought using a male mold to build a bimini covering for my center cockpit sailboat call! The tests re safe to use the epox to repair a polyester laminate is?! Chine of a Gougeon G-32 Catamaran Putty designed for filling and fairing, apply a gelcoat finish West. Case, in these areas start with a 100 percent solids epoxy such as wood, plywood, brick masonry... And ridges because they will cut away only the top of the.! The above steps are not visible to basically fair my entire hull ( below waterline ) consistency. Everything properly mixed is another matter using West System to plug holes left in the mold and works! Be able to see a test of gelcoat over unknown epoxy and left in the gelcoat still gelcoat. Hull repairs below the waterline Interlux Watertite epoxy filler be sanded and painted sand paper 16.25 – $.! Skim coat of thickened epoxy as it provides a better moisture barrier not add any structural to!
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