* Clean, Clean, Clean Make sure that the surface you’re bonding to is very clean. Can Interlux Watertite Epoxy Filler be sanded and painted? Can I still use gelcoat or should I paint instead, after popping the bimini from mold? 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. Joined: Jul 2005 Posts: 16 ... Epoxy fairing over foam sandwich cores. Could that work. I'm seeking advice for the 'right' fairing compound to basically fair my entire hull (below waterline). Danny in Baltimore. Let cure 6 hours. * Lastly, the bonding surface needs to be well scuffed with sandpaper to ensure a good mechanical bond. After sanding the 2nd application of thickened epoxy, there will be some minor gaps and imperfections. 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. Tracing the shape onto a board gives you a rough shape and then a batten can be used to make it a fair curve. Easily sanded when cured using a fairing … Can you apply gelcoat over the fairing compound? But he found it necessary to remove ALL the original gelcoat from the Gougeon-produced, West-System boat. 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. Primers are sold separately. I will typically stir for a minimum of 1 – 2 minutes. Can I coat the EZ-Fair with 105 Epoxy Resin let it set then finish off with Gel-Coat? * Presuming the mix ratio’s are correct, having everything properly mixed is another important step. Apply until the mixture is slightly raised above the hull surface. […] is the first of a two-part video series clearly demonstrating the techniques Andy used for his challenge, following up with the results as […]. A second application will fill in the valleys. Too much or too little can result un-uncured epoxy. When all the fairing is completed the surface often consists of a combination of fiberglass laminate, fairing compound and old paint or gelcoat. Scrapers are a great tool for removing drips, runs and ridges because they will cut away only the protruding surface defect. Wipe off excess fairing compound before it hardens to avoid unnecessary sanding. It’s been long believed that if you were using epoxy for your fiberglass repairs, you were more or less limited to having to use paint as your topcoat. Mark Bowdidge has been using Gelcoat over the epoxy on his boats for years but only on the inside of the boat. 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. TotalBoat Polyester Fairing Compound drags smoothly, sets up fast, and sands like a dream. Logically the test results should be independent of whether epoxy is applied to gel coat or gel coat is applied to epoxy. If you really want to cover your bases, transfer the mixed epoxy to a clean cup and stir a bit more. Colour Paste Colour Paste – 225 mL(8 oz) $ 27.75 – $ 42.50. I really enjoy your site and the You-tube video you provide. Get a 5% discount on Totalboat products. They call it flow coat and add styrene to slow the cure rate. Scrape the sides of the mix cup, scrape the bottom; repeat, repeat, repeat!. I keep hearing that a product call System Three SB-112 is an epoxy that is 100% with Polyester. Gelcoat will not cure properly if applied directly to cured TotalFair. Also, please remember that there are extended ad-free versions of these video’s available for Patreon supporters! Sounds like the process you outlined is prep for painting? Fairing & Filling Compounds These filling and fairing compounds are perfect for structural and cosmetic fiberglass repairs. * Cure time and temp. The goal of fairing is to create a surface without bumps or hollows. The white resin and gray hardener are mixed 1:1 by volume, not weight, until streaks are not visible. Mas Fairing Compound is a 50-50 mix of yellow and blue pastes (part A and B) that yields a consistent, green hue when mixed properly. Add to Wishlist + Quick View. Hope this helps! No. Only the top of the ridges formed by the trowel will be cut by the sand paper. Also what about Pettit’s Tie Coat Primer? Suitable for use over rough substrates. I was wondering what you thought. You want to make sure that all of the hardener is incorporated into the resin. Polyester or epoxy? If you’re looking to prevent stress cracks from coming back, I’d sand the surface down to bare glass, then apply the new material followed by bottom paint. Because Boatworks Today, its owners or partners cannot control how the information provided through these videos is applied, we will not be held liable for any damages; incidental or consequential. Second issue. Its aways best to apply glass onto glass (when possible). I will be using epoxy resin for layup. Over the years I’ve “broken the rules” on occasion and to date have not had any issues using gelcoat as my topcoat over epoxy. How to successfully apply a gelcoat finish over WEST SYSTEM Epoxy. I am thinking about sanding down stress cracks on a Laser hull and then laying in fiberglass cloth using the 206 epoxy based on your test followed by bottom paint. I have a few areas where the barrier coat and gelcoat has been totally removed. The 4118 Marine Epoxy Fairing Compound is a UV-stable paste with very little shrinkage for applications above and below the waterline.. The fairing compound will fill in low spots. This is a sort-of obscure question be relevant. Recommended as spray fairing for all Imron® Marine systems; Substrates When selecting your hardener, consider the required working time, the ambient temperature, amount of epoxy that will be mixed, and desired cure speed. Templates are very useful when fairing foils and can be created from a drawing or a surface. Mix Pettit 7050 EZ‐Fair Epoxy Fairing Compound according to the label instructions. Next video will show the results of the tests! I can’t speak from experience. Gelcoat should not be applied directly over epoxy fairing compounds like TotalFair. When the studs were pulled, the failures occurred in the fairing compound, cohesive failure of the gelcoat, or in the bond between the gelcoat and laminate. http://gougeon32.blogspot.com/search?updated-max=2016-02-16T07:51:00-08:00&max-results=10&start=6&by-date=false The only alternative is to use TotalBoat Polyester Fairing Compound instead of TotalFair. EZ-Fair 7050 Epoxy Fairing Compound is a lightweight, two-part epoxy putty designed for filling and smoothing surface imperfections above and below the waterline. I am currently restoring 2 GRP yachts which have some bad scuffing in the gelcoat. Fairing Compound should be of a consistency that can be troweled onto a surface without sagging. Use long strokes to spread out filler compound over the damaged hull. Hi Andy. Finishing the Gelcoat Repair with Fairing Compound. There’s alternating patches of fairing compound, epoxy primer and even gelcoat! A coat of thickened epoxy creates a uniform and stable surface ahead of final finish. You may be able to see in the picture what I am talking about. Or do I need to coat with Petitt protect. The person doing it is a professional boatbuilder and was working closely with West Systems people in consultation. They can be purchased, or made from hacksaw blades. After filling and fairing, apply a high build primer. Yes. Dont listen to the critics about your videos, the education of these products are money saved in my pocket. Ok gelcoat over epoxy. Thickness may very to adjust flexibility. Thank you!! It is designed to be easily sanded. 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. When considering this idea, there are a few things to keep in mind (and these are VERY important)! It claims it kills the blush. High humidity resistance and very good flexibility. If this is the case, in these areas start with a 100 percent solids epoxy such as WEST System Epoxy. To Repair a laminate polyester of my boat which resin you advice? 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 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. I would like to use the Petitt EZ-Fair over the fiberglass repair. The crack is below the waterline. They claim that you can use it as a tie Coat. Those of us using epoxy never put gel coat directly on top the epoxy. EXP System 2 part Epoxy Intermediate Hardener (5:1) $ 15.25 – $ 175.70. A fairing compound contains resin—either epoxy, polyester, or vinyl ester, and each resin is designed for different purposes. Will the gelcoat/ filler have enough bond to get me a good smooth surface over the roving? Check out his web site for all the details. Something that I want to emphasize is that the above steps are not only geared to epoxy. Though gelcoat is NOT a paint, it's important to note that before applying gelcoat over cured TotalFair, the surface must be primed with an epoxy barrier coat (such as TotalBoat TotalProtect), or an epoxy surfacing primer (such as TotalBoat 2-Part Epoxy Primer). Can micro balloons (insert other sandable filler) be used in the gelcoat as a fairing compound? I have just completed a repair using the west system. 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. Become A Monthly Supporter Of Boatworks Today Through Patreon! Do I need to coat the EZ-Fair with anything to give it a good bond to the Gel-Coat? This example shows a tool that flexes only in one direction and could be used on the chine of a round bilge hull. If the gelcoat has been damaged to the point where you can see the cloth pattern underneath or it has become delaminated, it will need to be repaired prior to application of primer. I am preparing to build a trimaran using a similar technique but his renovation has given me pause. After marking the low spots, use a spreader with a notch to create a “guide.”  After a strip of fairing compound is applied, the batten can be wrapped in release fabric and placed into the fairing compound. | Developed by Fortiris Group LLC. Poly-Fair F26 fairing compound is used primarily in the boat building and fiberglass fabrication industries for fairing and sanding plugs, molds, one-off custom boats, fairing of lead keels (not if coated with epoxy), fairing of keel to hull joints, repair of damaged fiberglass parts, and mold rework/modification. Use the epox to repair a polyester laminate is correct? The repair is safe? Shop Our Amazon Store For Fiberglass Materials And Supplies! 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. 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. Hi Pat! Maybe not in a year or two but water instrusion kills boats. Your videos are strike such a perfect tone; you really have a sense of your audience! TotalBoat TotalFair marine epoxy fairing compound is easy to mix, easy to spread, and easy to sand to a super-smooth finish. Very good filling properties. EXP System 2 part Epoxy Epoxy Resin $ 16.25 – $ 365.60. I’m not saying that it’s common practice, but in certain circumstances it’s something that I have done successfully. Matrix gelcoats are sold per kg. It is advised that you allow your epoxy to cure for at least 3-4 days before moving forward. The template can be used to form guides to assist in the application of fairing compound on the rest of the foil’s surface. I am building a 16′ stitch and glue power boat designed by Bowdidge Marine Designs in Australia. Compare to 3M Marine Premium Filler, FGCI Gelcoat Putty, and Evercoat Polyester Glazing Putty. 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. http://gougeon32.blogspot.com/search?updated-max=2016-02-16T07:51:00-08:00&max-results=10&start=6&by-date=false. fallguy, Apr 28, 2019, in forum: Fiberglass and Composite Boat Building. 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! How about same prep, epoxy over gelcoat? 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. Will you be finishing with primer, barrier coat, topcoat, or gelcoat? I will generally use 60 or 80 grit paper and sand the surface until it is uniformly dull in appearance. Please click below to find out more. Please ‘Like’ or ‘Share’ above and join the discussion below in our comments section!! * A natural by-product of epoxies curing process is something called amine (or amine blush). I have done it with epoxy and it worked fine but it was hard to sand. Luckily none of this has broken through the gel however I am going to have quite a lot of fairing and filling this winter. Also, is an epoxy primer over the awlfair required or can I just top off with numerous coats of the Interlux Epoxy based Interprotect 2000? We dont want to have to sand the epoxy but generally would prefer to sand the high build as its a lot easier. When removing material it is very important to use a “long board” which you may have to make yourself. 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. 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. If it’s not fully cured you’re going to run into problems. * Proper ratio’s of resin to hardener are VIP. Provides, when used in combination with DP3350 Fairing Lite, a complete filling and fairing solution for turning rough surfaces into perfectly smooth areas. If used below the waterline, Polyester Fairing Compound must be overcoated with TotalBoat TotalProtect Epoxy Barrier Coat Primer. You can make a fairing compound by adding a filler material to resin. To ensure good adhesion with highly thickened mixtures, apply a thin coat of unthickened epoxy to the surface before troweling on the fairing compound. Fairing compound is typically not particularly strong. Before applying gelcoat, you must overcoat TotalFair with an epoxy barrier coat or epoxy surfacing primers, such as TotalBoat TotalProtect or TotalBoat 2-Part Epoxy Primer. Or is there another product you can suggest? Just wondering why you did not test the high build???? I am guessing, if I use gelcoat I would need to let the gelcoat fully cure, washing away blush, prior to epoxy layup? 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. Make sure the compound extends beyond the repair area. Share this post. Vinylester Fairing Compound (VEFAIR) is a high build material, ideal for use in the marine and pool industry as a filler. Can I apply Marine-Tex Gluvit to a wet surface? Discussion in 'Fiberglass and Composite Boat Building' started by newo eloc, Jul 7, 2005. At least there were for this repair. I am building a 16′ stitch and glue power boat designed by Bowdidge Marine Designs in Australia. This will ensure that all the hardener is well incorporated. Add to Wishlist + Quick View. Most DIY owners are typically working on boats that have a gelcoat exterior, which is what the focus of this experiment was geared towards. Right: 1/4″ wood strips. Now, the renovator is a self-admitting obsessive. It is brushed on and then flecked with a spray gun. Depending on the temps you’re working in, epoxy can take a few days to fully cure. Custom sanding tools may be required for gunwales, toe rails and style lines. There are boat builders using epoxy layup over gelcoat in the mold and that works but repairing them is another matter. biaxial glass over meranti marine plywood. Usually I would shoot gelcoat over the mold prior to layup when using polyester resin. What can I use to make emergency hull repairs below the waterline? 4118 Marine Epoxy Fairing Compound. By applying a coat of thickened epoxy to the entire surface, a more uniform and stable surface will be created ensuring an excellent surface for the final finish. It does not add any structural integrity to the hull. Simple.. I have been using west system to plug holes left in my transom from previous owners accessories. By applying a coat of thickened epoxy to the entire surface, a more uniform and stable surface will be created ensuring an excellent surface for the final finish. After these strips cure, fairing compound can be applied between them to fair in the entire surface. Consider ambient temperature when selecting hardener. Scrub the surface with clean water, wipe the surface dry with a clean papertowel and this detail is taken care of. fairing compound over gelcoat ? It was epoxy laminate into polyester gelcoat with some kind of ‘tiecoat’ included in the layup schedule vacuum pressed into the female mold. © 2020 Boatworks Today. Saw cut through bottom vinyl and foam core only. Add skim coat of F5 Filler / Epoxy compound to achieve a … There are specific materials intended for this purpose. Thank you again for your wonderful videos. Sandwich foam between heavy-duty cloth-backed vinyl. We generally use a high build epoxy primer, and then a finish primer and then a 2 part polyurethane. 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 … When all the fairing is completed the surface often consists of a combination of fiberglass laminate, fairing compound and old paint or gelcoat. Can fairing compound be used below the waterline? Grinding the West System to below the gel coat seems like it will cause leaks in the future. But that’s ok, the next two coats of epoxy primer will cover that and prep it for the two part polyurethane paint! These are good general rules when working with composites; either polyester or epoxy. Reduce sanding by applying the first layer of fairing compound with a notched trowel. Can TotalFair be applied over epoxy resin? A wipe-down with acetone and / or a wax remover both before AND after sanding will remove surface contaminates. 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