Always buy WEST SYSTEM products in original, sealed factory containers. Sand your wood surface with the grain to pull out all the beauty it has waiting under that dull finish. After epoxy clear-coating and sanding vigorously to achieve a flat, fair surface, you then build up the coats of varnish as described above. We cannot warranty decanted products because they may be diluted, contaminated, or not actually WEST SYSTEM products. Gelcoat is sprayed into a mold before the glass fabric and resin are applied to provide a smooth pre-finished surface when the part is removed from the mold. The benefits of varnish over epoxy. Always buy WEST SYSTEM products in original, sealed factory containers. The epoxy paint began to rise crack & bubble in places. It's very … A one-part epoxy kit comes in a single can and will usually provide a satin finish. Click to see full answer. For complete descriptions of all WEST SYSTEM products, including selection and coverage guides, go to the Product Guide. This type of finish can significantly outlast varnish alone, but unlike a two-part polyurethane finish, it needs frequent recoating. Proceed with your final coating after the epoxied surface has dried thoroughly. It is a good idea to make a test panel to evaluate the degree of surface preparation required, and the compatibility and handling characteristics of the finish system. Mix the epoxy resin with the catalyst in your five-gallon bucket with a stir stick. Preparation for the final finish is just as important as it is for recoating with epoxy. Epoxy resin is used on many things such as boats, window sills, gutters and swimming pools. Together the two form a protective system far more durable than either coating by itself. If you are doing multiple pours of epoxy to achieve your desired thickness, or perhaps the result of your first pour didn’t come out exactly how you expected, then you may be wondering if you can epoxy over epoxy. Two-part linear polyurethane (LP) paints offer the most durable protection available. Call our Technical Staff toll-free: 866-937-8797 (Weekdays 9:00 AM to 5:00 PM EST), Outside of the U.S.A., call 1-989-684-7286. Most types of coatings are compatible with epoxy. For detailed instruction on the application of these techniques in repair and construction, refer to specific WEST SYSTEM instructional manuals and video demos. Their disadvantages are low UV resistance and low abrasion resistance. Epoxy paint on wood takes forever to dry. Use a chemical degreasing agent and a coarse broom or brush to scrub greasy areas clean. Varnish will work over epoxy, and will provide some UV protection. You can paint over epoxy resin to match the colour of the rest of the object it is applied to. This means most paint solvents will not soften, swell or react with it. These elements will easily break down a regular varnish or polyurethane over time. Refer to our Fiberglass Boat Repair & Maintenance manual (pdf), published by Gougeon Brothers, for detailed information on patching gelcoat over an epoxy repair. Avoiding Sanding and Priming Prep. Epoxy Finish for Outdoor Wood Furniture. As mentioned, an epoxy finish for an outdoor table does not work well without additional protection. This beautiful finish is waterproof and heat resistant to 120 degrees and needs no polishing. Thoroughly cured epoxy is an almost completely inert hard plastic. Dry with paper towels. Rinse water should sheet evenly without beading or fish-eyeing. Final epoxy surface prep involves finishing techniques that will not only add beauty to your efforts but will also protect your work from ultraviolet light, which will break down epoxy over time. The paint dries … Posted by : Latex Agent / May 12, 2017. They want to know if it is okay to go over it and what they have to do to properly prepare the surface. Allow the final epoxy coat to cure thoroughly. The finish coating extends the life of the epoxy moisture barrier, which in turn provides a stable base that extends the life of the finish coating. Polyester gelcoat is a pigmented version of the resin used to build fiberglass boats and other products. One-part polyurethanes offer easy application, cleanup, and better properties than alkyds. Epoxy is damaged by sunlight, you need to protect epoxy/fiberglass with varnish when it is there for strength. Primers are usually not needed to help a paint film bond to epoxy, although interfacing primers may be required with some specialized bottom paints and high-build primers are useful for hiding scratches or flaws in the substrate. Mix your epoxy and add any color additives you are using, then pour it and spread it over the surface or paint it on. CAUTION! Estimating Epoxy Coverage for Fabric Application, Fiberglass Boat Repair & Maintenance (pdf), Common Mistakes in Fiberglass Repair (Webinar), The Gougeon Brothers On Boat Construction book, Health Effects from Overexposure to Epoxy, Call from outside the U.S.A. 1-989-684-7286, Fiberglass Boat Repair & Maintenance manual. Now I'm kinda afraid to shoot lacquer over enamel epoxy at all. I was dead wrong! If you do not need it for strength, just install the varnish to protect the wood from the UV. To reduce the possibility of contamination, it is a good idea to begin coating within 24 hours of the final sanding. LP paints are available as pigmented or clear coatings and offer excellent UV protection, gloss retention, abrasion resistance, plus compatibility with epoxy. Latex paints are compatible with epoxy and they do an adequate job of protecting the epoxy barrier from UV radiation. One-part epoxy is cheaper and a little easier to use as you can work directly from the can, but the finish will not be as durable. They are also more expensive and some may be incompatible with amine cure epoxy systems such as WEST SYSTEM epoxy, although 207 Hardener may offer better compatibility. These coating systems protect the epoxy from ultraviolet light and require proper epoxy surface preparation before you apply the final coating. However, it is still a good idea to build a test panel to assure coating compatibility. Another method to achieve “the look” is gaining popularity and cuts labor time. 0. Alkyd finishes-enamel, alkyd enamel, marine enamel, acrylic enamel, alkyd modified epoxy, traditional varnish and spar varnish-offer ease of application, low cost, low toxicity, and easy availability. In many architectural applications, latex paint may be the most suitable coating to use. The resulting epoxy/varnish coating system is much more longer lasting than either one alone. Self-etching primers do not work well on an epoxy coating because of epoxy’s chemical resistance. Test first. If you want more than one coat of epoxy, this is the time to do that as well. All other thing being equal, a white (especially a glossy white) coating will last the longest. Glossy Finish. After completing a set of outdoor white oak dining chairs, I made the decision to finish them based upon the process outlined in FWW #179 Durable exterior finish. After you are satisfied with the texture and fairness of the epoxy surface, rinse the surface with fresh water. You can stain over epoxy if you're using a gel stain, which works like paint more than stain.Epoxy, like any plastic, won't absorb coloring and most likely the stain will rub off of the spot while you apply the finish (assuming you're using a wipe-on).The dust within the glue will accept stain-oil-varnish … Follow the recommendations given for preparation of fiberglass surfaces. Epoxy paints are available in one-part and two-part versions. The benefits of varnish over epoxy. Epoxy is, however, prone to UV damage, so the overcoat of varnish provides essential UV protection. Varnish. For complete information on the hazards associated with epoxy and the precautions you can take to avoid them, visit our Safety section. How to Paint Over Varnish, Polyurethane, Seals and More Without Sanding. Follow all of the instructions from the coating system’s manufacturer. The varnish protects the epoxy from UV damage and the epoxy gives the varnish a nice and stable surface to bond to. Two-part epoxies offer many characteristics similar to the higher performance polyurethanes. The only drawback is if you ever have to get back to the wood it can be a real headache . Varnish does give incredible gloss if applied correctly. This is common on wood kayaks and surfboards. Some professionals add extra solvent to the first few coats of spar varnish they are applying over wood. Most bottom paint systems are compatible with epoxy and can be applied directly over a prepared epoxy barrier coat. The finish coating extends the life of the epoxy moisture barrier, which in turn provides a stable base that extends the life of the finish coating. CAUTION! This will save you from bubbles popping up or creating craters due to cold epoxy on warm wood. If there are runs or sags in the epoxy, begin sanding with 80-grit paper to remove the highest areas. Bottom paints are available in a variety of formulations. Wash the surface with a Scotch-brite™ pad and water to remove amine blush. Just measure, mix and pour! Because of the risk of UV damage to the epoxy, it is even more essential to keep the varnish fresh. The name of this finish often is used generically for a finish or top coat. UVPoxy can be used for a glossy finish on your epoxy table. Because there are no solvents evaporating away from the epoxy, it builds thickness faster per layer than varnish and it doesn't shrink when it cures. When using epoxy, it can be a helpful process to add a second layer, but you want to make sure to follow the correct procedures. Epoxy Manual - Applying finishes over epoxy surfaces All exposed epoxy surfaces should be painted or varnished with a high ultra-violet (U-V) resistant varnish to protect the surface against potential long-term breakdown from U-V radiation, a phenomenon which occurs with all boatbuilding resins. Top. Humidity changes, for one, cause the wood to swell and shrink much more than wood left indoors, and that excess movement alone is enough to crack a regular varnish in short order. Epoxy is a strong adhesive, but also brittle and selectable to degradation when exposed to sunlight. This formulation enables it to … like. You can apply fewer coats of varnish (four or five instead of up to ten coats). Re: Spar Varnish over Epoxy Resin for UV protection? Obviously, I learned this lesson the hard way after a $6,000 epoxy table fail. Applying New Epoxy over Old Epoxy I frequently get calls and emails from folks who want to install our epoxy over an existing epoxy floor or coating that they have. To help you identify and prevent potential problems associated with using epoxy, go to the Problem Solver. Woody_waverider. A high gloss finish reflects a higher proportion of the light hitting the surface than a dull surface. For a sealer coat, you can get 100 sq. About 3 hours ago I sprayed a guitar with epoxy and I thought it would be dry enough to spray clear coat lacquer over it safely. System Three Marine Spar Varnish is a high-build coating designed for marine epoxy and exterior wood surfaces such as railings, doors or any surface where a clear, durable gloss finish is desired. I did a kicker plate with glass and gel if it works for your trans plate Btw.. from what Ive heard epoxy then Varnish/Thanes is the Ultimate way to go. This will give you a more pristine result. If the instructions on your paint or varnish recommend a specially primed surface, follow the recommendations given for fiberglass preparation.
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