At 70 degrees, you get 15 minutes, but at 90 degrees, you only get 5 minutes. Sand the entire surface to be coated with 150 grit sandpaper. If you’re not sure how thick it is, pick up a mil gauge. General Finishes Gel Stains contain urethane, which allows the gel stains to be used for finishing over existing top coats, stains, and paints.. The gel stain is thick like pudding, not a liquid. by forcing it through a small orifice (.015-.026 in.). Most re-sprayed gel coat will cure in 2-4 hours, although overnight cures are ideal. (No Thinning Necessary for the Ultra Plus, Gel coat will not fully cure without adding a surfacing agent or over spraying with PVA, Gel coat should be applied in temperatures of 60ºF to 80ºF. You should catalyze your material so that it cures as quickly as possible within your working time. Exposure of gel coat to a severe chemical environment. **NOTE** Duct tape is recommended over masking tape because it provides better protection. Step 4: Gel Application. Product data sheets can give specific catalyst recommendations. Resin that cures still in the mixing pot is unusable. It is the key to the final quality of the product while choosing the high quality of the gel coat and the correct application process. Proper catalyst selection is vital. This is a simple, easy way to see the thickness of your gelcoat. If you want to roll on a gelcoat, be sure to use a 1/8 “or 1⁄4” solvent-resistant nap. × Gel Coating Photo credit IStock Photo. Otherwise, there’ll be only one coat. If you’re not sure how thick it is, pick up a mil gauge. Most gel coatsâ ideal catalyst level is 1.8 percent at 77Â°F (25Â°C), however, specific shop conditions may require this number to vary between 1.2 and 3 percent. If you’re not sure how thick it is, pick up a mil gauge. Gelcoat should not be used when temperature conditions are below 60°F, as curing may be adversely affected. A good practice is to pour the mixed gel coat from the mixing container into another container used for application. Bottom Paint Store Blog – How to Articles, Partall Film #10 PVA Surfacing Agent For Gel Coat, Application of Marine Epoxy Primer to a Boat. Gel coat materials come as complete products and not other materials other than catalysts should be added. Gelcoat requires Methyl Ethyl Ketone Peroxide or MEKP to enable the process of hardening. Avoid spreading the gelcoat too thin or you’ll get stroke marks. For applying your gelcoat, you can either roll the gelcoat on, like paint, or you can spray it on. Gel Coat Additives: You should also determine which additives that you will use with your gelcoat application. Gel coat is used as an in mold coating on composite parts to produce a durable part surface. Be sure to have a good strategy when applying your gelcoat. Remember to always lap wet. Fading and Water Spotting. If gel coat is not applied properly it ultimately can increase the cost of the product made, as often is the case, cutting corners in this process will not prove to be worth it. Steel Blue is a dye you’re going to wipe on or you can use the blue dye spray. The idea behind a gel stain is to spread it onto the wood in a thick layer for a few minutes and then wipe it off with a clean cloth. “Lay on” the gel coat in a heavy thickness (about 10 mils) using horizontal strokes, and working from top to bottom. Dust and dirt particles are your enemy here, so make sure you clean the surface thoroughly.Determine whether you need one or two gel coat coats. Sanding Existing Gel Coat: You want to sand the surface to make a mechanical bond to the gel coat. This is a simple, easy way to see the thickness of your gelcoat. If you brush on the gel coat, make sure to use a solvent-resistant brush. Sanding between coats is not necessary unless a surfacing agent has been added to your gel coat. If using wood mixing stick, place stick in resin before adding, Only catalyze slightly more than needed. My buddy at West Marine says to fix each scratch individually by taping off the area and applying gel coat. airless system, the gel coat never comes into direct contact with compressed air and is not broken up by air. Todd Johnson has worked on the development, commercialization, and sales sides of the composites industry since 2004. epoxy resin max gpe white white gel coat application a roller coat technique demonstration max gpe white a/b www.theepoxyexperts.com call 877 403 8008 Once you mix and catalyze, you have about 15 minutes to apply the gelcoat before it starts getting hard or starts to “gel.” The actual working time depends on the amount of catalyst and how hot the working conditions are. Read all warnings on product labels and only use additives recommended as described per each product. Check the pattern and flow rate from the spray tip. Spraying gel coat onto vertical surfaces will not cause sag because of its’ thixotropic characteristics. Gel coat makes the surface of f iberglass products more beautiful and plays a role of protection preventing resistance to chemical erosion, bruise and aging. Brush the gelcoat onto the fiberglass using short vertical strokes. Every 10 feet or so, you’re going to want to clean your pad with a spur or some air to make sure the contaminants don’t scratch your surface.If you want a perfect, glossy shine, use a machine glaze and then two wax coats,and you’ll have a stunning, glossy professional finish. As a general rule: The catalyst level (MEKP) should not exceed 3.0% or fall below 1.2 for proper cure. Spray: Airless or Conventional: 2.0-2.5 orifice tip. The thickness of the matchbook cover is approximately 18 mils. Gel coat is best applied by spray application with a pressure pot or catalyst injection system. Wiping will allow you to control the evenness and depth of color being applied, as the more you wipe away, the lighter the color level of the stain. The heavier fast-cut grits (40/80/100) are used to feather sand and ground out a routed area prior to filling. The color wet is the color when dry. If you decide to roll on the gelcoat, be sure to use a solvent-resistant 1/8” or ¼” nap. Gel coat also can be applied with a standard paint gun with primer nozzle (70-80 thousandths) at 40-50 psi or Preval sprayer. Instead, an air-activated high ratio pump (usually 33 to 1) puts the gel coat under high pressure (1000-3000 psi.) If you need more time to work, be sure to sit the can in some cold ice water to cool it down to 60 degrees to allow you a little more working time. With all other factors normal, gel coats are ready for laminating within 45 to 60 minutes after catalyzation. While gel stain does go on thick and sit on the surface of the wood, I found that you can still see and feel the natural wood grain beneath, unlike paint. When the surface is clean, you want to get moving fairly quickly; if the surface is sitting for some amount of time, you want to re-clean the surface. Usually 320 or 400 grit wet paper is sufficient for the initial sanding. I have been applying 2 coats of gel coat of about 125 grams per coat using a cup gun. Here comes the final and most exciting part of the manicure: painting your nails with gel polish. Gelcoat will not darken or change colors when it dries. Begin wet sanding with the finest grit that will remove orange peel in the re-sprayed area. It is easy to use for the “do it your selfers’! Gel coat makes the surface of fiberglass products more beautiful, and plays a role of protection preventing resistance to chemical erosion,bruise and aging. Fiberglass resin is a thick liquid that requires a catalyst in order to become a solid. We also sell a Brushable Gelcoat that can be applied with a brush. Gelcoat or 'Gel Coat' is a material used to provide a high-quality finish on the visible surface of a fibre-reinforced composite.The most common gelcoats are thermosetting polymers based on epoxy or unsaturated polyester resin chemistry. 99-$107.99 $ 107. It’s a very small number. Avoid dilution of gel coat with solvent during application. The amount of work and material saved by investing in a proper gel coat application process will pay off in the end. Resin and gel-coat manufacturers are constantly trying to keep up with these demands, and several have brought out low emission products that promise to reduce emission levels without compromising on surface quality. Start the spring by hitting the hull with an oxidation remover and a buffer (after an initial wash-down, … Gel coat is typically a thicker material and is catalyzed so that it will harden. Darker colors need a little more catalyst for the same reaction, so you can catalyze up to 2%. Due to the catalyst and thicker nature of gel coat spraying it requires specific considerations. A gel coat should be sprayed in three passes for a total wet film thickness of 18 +/- 2 mils thickness. Keep in mind that you have a limited time to apply what you have mixed (usually between 5-15 minutes). This coat should be mostly in the repair area, and may be repeated. After applying a coat, cure the nail in your UV lamp for up to 30 seconds. Gel coat is best applied by spray application with a pressure pot or catalyst injection system. 3M and UV tapes , and masking papers are recommended. Gel coat also can be applied with a standard paint gun with primer nozzle (70-80 thousandths) at 40-50 psi or Preval sprayer. HOW TO: USE OIL BASE GEL STAINS OVER EXISTING FINISHES. A gel coat should be sprayed in three passes for a total wet film thickness of 18 +/- 2 mils thickness. If you try to apply it with pressure, rather than floating it on with an aerosol tool, it can remove the base coat beneath it. Paint on a thin base coat of primer gel from your cuticle to the free edge. Choose a good pure (natural) resin resistant bristle brush with tapered ends. Method of Application: Next, determine if you are going to brush, roll or spray your gelcoat so you can prepare the gelcoat for application. To test whether a gel coat is ready for lamination touch the film at the lowest part of the mold. 4.7 out of 5 stars 405. The three active ingredients in a MEKP-based catalyst are: Each component helps the curing of unsaturated polyesters. Too thin a coating can result in undercure of the gel coat. It seems like the resin pulls the pigment or dilutes the gel coat. Going up to 400, then 600, and eventually 800 grit sandpaper.You can use an 800 grit compound for the gelcoat at this stage. Gel Coat Application Tips. We suggest a thickness of 18-20 mils to properly cure. A proper gel coat application can often mean the difference between the look of a professionally fabricated part, and an amateurish attempt. Gel Stain Tips and Tricks. This guide will cover tips on spraying gel coat, equipment suggestions, ways you can spray gel coat, and more. What’s best? When spraying to a radius, flow the gelcoat to the tape. Below you will find a detailed gel coat preparation guide on how to apply gelcoat to your boat, RV or other surface. This time element is dependent on material temperature, room temperature, humidity, air movement, and catalyst concentration. Avoid brushes that are either too stiff or too soft. A colour variation, usually showing as fading or bleaching. Thin gel coat to your preferred viscosity using #70 Styrene Thinner or #1039 Duratec Clear Hi-Gloss Gel Coat Additive. Ideal range is 1.8% @ 77°F. Correct application of gelcoat is critical to get the optimum performance from it. Once the coating (, Clean repair area and all tools with acetone prior to application. All Gel Coats from Bottom Paint Store come with MEKP with each gelcoat purchase. This further assures that no uncatalyzed material is clinging to the sides of the pot. Use a flat, narrow brush to … As soon as you are done spraying, clean your sprayer fully with acetone. TotalBoat Marine Gelcoat for Boat Building, Repair and Composite Coatings. Spraying Gelcoat: Please follow the instructions located on the products page or the label. Refer to the catalyst chart located on the product page for the gelcoat you are using or follow the label guidelines. Catalyst levels are important to the curing of the gel coat and dependent upon shop conditions. Use the recommend thinners / addtives only which are listed on the gelcoats’ product page. Air bubbling for mixing is not advised. 4.3 out of 5 stars 29. The amount of gel coat sprayed and the maintenance history of the spray tip will determine how often they are replaced. Final thickness should be 16-20 mils minimum or the gelcoat may not fully cure. It’s best to do a 4 foot by 4 foot area at a time. There are many catalysts for use in resins and gel coats. With the oak cabinets, the grain was very evident post-staining. Gel time at 1.8% MEKP is 10-17 minutes. (P.S. The secret to a good finish is to apply gel coat properly. It is ineffective and adds for potential water or oil contamination. Generally, one heavy coat is sufficient. This may feel a little bit like spreading thick ketchup and will appear very uneven, which … When using styrene thinner, add to gel coat at 2-5% to lower viscosity and … Our technicians suggest the use of Dyekum Steel Blue Dye to be really thorough. Better yet, how’z about a video targeting severely scratched gel coat (cause there’s more than one in mine, like 10 or twelve worth fixing). Start by sanding the surface with 150 grit or sandpaper. It must be mechanically finished by wet/dry sanding and polishing for a “like new” look. It is ready if no material transfers. Remove seals from the edges of parts or fittings when doing a repair around that part or fitting. Gelcoat derives its name due to it high viscosity and ability to be applied thickly on vertical and overhead surfaces in one coat. Catalyzing Gelcoat with MEKP: All gelcoat MUST be catalyzed with MEKP to cure. We suggest a thickness of 18-20 mils to properly cure. The thickness of the matchbook cover is approximately 18 mils. If you don’t see the blue dye again, you know you’ve sanded it all properly. If you’re using our Brushable Gel Coat, you’ll want to let it cure overnight to make sure it’s completely cured. Avoid re-brushing as this could remove the waxy surface additive. 99 ($2.83/Ounce) $2.00 coupon applied at checkout Save $2.00 with coupon. If there is a trim color, you should have a narrow trim brush on hand. Our Brushable Gelcoat comes with MEKP hardener with every purchase, but you may need more which you can purchase as an option depending on the application, temperature and other environmental factors. Not only handlay-up products, but also pultruded products can be attached gel coat. Be even and consistent in your gun movement, overlapping each previous pass slightly and not hesitating on the ends. In gel coats, only MEKP-based catalysts should be used. Unlike the in-mold application, applying gel coat to a finished product relies solely on a mechanical bond. The consistency of gel coat is too thick to use in a regular spray gun, so in order to use it in a regular spray gun the gel coat … The equipment used for spraying must be selected carefully and maintained well. Gelcoats are based on a thermoset resin that requires an initiator and proper temperatures to cure thoroughly. The application of gelcoat and by pretty straight forward when you follow this guide. We encourage the use of Acetone, because it does not leave the residue and evaporates easily. How to repair and re-coat gel coat finish on kayak or boat hull using DIY methods. $29.99 $ 29. Proper gel coat application includes: Gel coats should be sprayed and not brushed. Brushing Gel Coat The major disadvantage of gel coat is that they cannot be applied in a perfect “self leveling” coat by brush. Cure each finger individually under the LED lamp for 5 seconds. It allows for a much smoother finish and less time finishing the gelcoat. (other Gelcoats are best applied by Spray) The Ultra Plus Brushable Gelcoat is designed to self-leveling and is much easier application. Gel coat consists of fiberglass resin that is pigmented with color. If the surface is already coated with gelcoat, or if the surface is a fiberglass or polyester resin, then the application of gelcoat is a snap. Application. This can decrease thixotropy, which increases sag. Tips will wear over time. Each of these coats of gelcoat may involve several passes. We suggest 1-1/4% to 1-1/2% by volume, i.e. 4.8 out of 5 stars 68. You may either roll the gelcoat on, like paint, or spray it on, to apply the gelcoat. Too thick a coat can crack when flexed. Plug is 14-inch by 16-inch. For most work, a 3″ or 4″ wide brush will suffice. Pot life (amount of time for application of the product) shortens dramatically as you mix larger batch sizes. Gelcoats are modified resins which are applied to moulds in the liquid state. Take Our Gel Coat Troubleshooting Quiz! To start, apply base coat and shine your nail under a table lamp to ensure it is covered up to the edge. The time is dependent upon: A slowing of gel and cure occurs with low temperatures, low catalyst concentrations, and high humidity. Take steps to cover and protect the rest of the boat before starting. Gelcoat needs to be applied evenly. Use 3M Abrasives for best results. Please refer the to Catalyzation chart on the Brushable Gelcoat page or on the label. If the surface is paint then the paint should be removed before the gelcoat is applied. Wear gloves while working with gel … Clear coat is best applied with a spray gun because it acts like a solvent. Use a gelcoat spray gun such as ES Manufacturing Gelcoat Spray Gun G830, ES-G100 Spray Gun , or equivalent. How Do Improperly Applied Gel Coats Increase Cost? 1-16 of 500 results for "white gel coat repair kit" Price and other details may vary based on size and color. A Brushable Gel coat that can be applied with a brush and does not need any other additives except MEKP that is included with your Brushable Gelcoat. Duct tape off adjacent gunwale molding, and deck fittings you are unable to remove. DIRECTIONS Prepare existing surfaces first by cleaning well. Be sure not to use foam rollers because they tend to leave the bubbles. Gel coats will also not entrap air when applied according to instructions. temperature Be sure not to … At this point, the repair is ready to prep and spray/brush with gel coat. Shop temperature is 72 to 75 F. I have let gel coat dry for up to 48 hours before laminating but the moulds always seem to have a thin gel coat when held to the light. The following is each chemicalâs specific role: Achieving the correct thickness of a gel coat is imperative as well. OK, enough of the background info! Once your repair is covered, feather a ‘flow’ or sanding coat on the masked-off area making layered passes to avoid a buildup of gel coat in any one area. Too thin a coating can result in undercure of the gel coat. If cracks or gouges are present, they should be repaired first. The thickness of the matchbook cover is approximately 18 mils. Anything below 60 degrees, and your gelcoat will not cure, but as you get warmer and warmer, your working time will decrease rapidly. Store gel coat in a cool, dry place; Gel coat should be applied in temperatures of 60ºF to 80ºF; Always use eye and hand protection If you change colors, it will require at least two gel coat coats.If this is going over a patch, at least 2 coats are recommended to get a uniform surface. Where unusual exposure can be anticipated use special gel coat resins which have been approved. Gel Nail Polish Starter Kit - BabeNail Cyberpunk 12 Colors + 3 Base Top Coat Gel Polish Set Soak Off UV LED Manicure Gel Nail Polish Set 6W MiNi UV/LED Nail Lamp DIY Gel Nail Kit. When working on the deck or cabin, tarp off the adjacent areas. When sanding areas that have been filled with putty we suggest using 40 or 80 grit sandpaper, depending on how large the repair is. It depends on a number of parts that get rejected and the work required to fix them. Generally mix one-pint batches. Initially spray a cover coat as smooth and evenly as you can to cover your repair. Prepping the Surface: Remove rails, cleats, louvers, snaps, striping tape, etc. Also, they are used for the first sanding of gouges, dock dings, scratches, and blisters. I personally do not like how dark gel stain looks on raw wood. For product consistency, gel coats should be mixed for 10 minutes before use. Too thick a coat can crack when flexed. When painting on the gel polish, use short strokes, especially around the cuticle … Agitation should be enough to allow the product to move all the way to the container walls while preventing as much turbulence as possible. Applying gel coat correctly is of utmost importance to making aesthetically pleasing and long-lasting end products. Gelcoat needs to be applied evenly. Determine the Existing Surface: First thing you want to do is look at the surface on which you want gelcoat applied. Application Apply catalyzed gel coat to a thickness of approximately 20 mils or slightly above surrounding gel coat. This should be added after all other additives just prior to application. 6. Ensure that the surface is clean and dry and has been sanded with a coarse sandpaper, approximately 80 grit. Spraying gel coat onto vertical surfaces will not cause sag because of itsâ thixotropic characteristics. Gel stain will not require you to … Once the fill area is level or contoured to the desired shape, sand with 100 grit paper to remove the course scratches from 40 or 80 grit. Gelcoat needs to be applied evenly. Apply catalyzed gel coat to a thickness of approximately 20 mils or slightly above surrounding gel coat. If the flow rate increases or the spray pattern declines, this indicates wear, and the tip should be replaced. Not only hand lay-up products but also pultruded products can be attached gel coat. In open flat areas, layer passes. Spraying Gel coat can be challenging. Overmixing may also result in styrene loss that can add to porosity. The coating is designed not to ‘yellow’ and to keep its glossy surface and resist blistering even under harsh conditions. Swipe on a base coat—it’s basically the foundation for any fire gel mani. What Should be Applied to a Baptismal Pool, Water Fountain or Small Pond? Let’s get down to the best gel stain tips and tricks, which I’ve compiled over the last several years of working with gel stain on various projects. Mix small batches at a time since too much MEPK will result in hardening of the, DO NOT WORK IN DIRECT SUNLIGHT -Choose a shady location or an overcast day. We stock a wide variety of colors in marine and tooling gelcoat. Gel coat will not fully cure without adding a surfacing agent or over spraying with PVA; Check color thoroughly before applying. Always monitor equipment and application procedures to ensure proper application and cure of the gel coat. The Properties and Applications of Platinum, How to Make Nitrocellulose or Flash Paper, B.S., Business Management, University of Colorado Boulder, MEKP monomer: plays roles in initial cure and overall cure, MEKP dimer: active during file cure stage of polymerization, high MEKP dimer typically causes porosity (air entrapping) in gel coats. We suggest a thickness of 18-20 mils to properly cure. However, if you have opacity problems two coats may be necessary with a light sanding between coats. Gel coats will also not entrap air when applied according to instructions. This is a simple, easy way to see the thickness of your gelcoat. Applying Gelcoat by Brush or Roller – (Use a Brushable Gelcoat) : When applying gelcoat by brush or roller, we recommend the Ultra Plus Brushable Gelcoat. Environmental factors that may require an adjustment in catalyst levels are: A catalyst level below 1.2 percent or above 3 percent should not be used because the cure of the gel coated can be affected permanently. This will avoid unnecessary sanding scratches. You want to use abuffer that turns 1600-3000 RPM. You could also use clear coat in a spray can, but a gun will give you a smoother, more professional finish. The car polishers won’t work if they’re spinning too slowly, so you want to check the speed of the spin. Spraying Gelcoat delivery rate of no more than 2.5 pounds per minute with conventional air atomized spray, and no more than 4 pounds per minute with airless equipment. He also writes about the industry. You should also feather the surrounding area of the gel coat repair with 220/330. 13-15 cc per quart. Use Short Strokes. West Marine - Gelcoat Repair Kit. Incomplete cure will result in poor durability of the gelcoat. 99. Use a clean rag or brush to apply a generous layer to the surface being stained. Gel Coat Troubleshooting Guide Put your Gel Coat Troubleshooting Knowledge to the Test!? Gel coat is typically the first layer of a part to be applied. Finishing your Gelcoat Application: If you’re using our Professional Grade Exterior Gelcoat, you’ll be ready to sand and buff your freshly gelcoated surface after about 1- 3 hours. You want there … The high velocity fluid impacts with ambient If you are applying gel over another finish you need to clean the surface well with a mixture of one-half water and one-half … Some say to just spray the whole thing with gel coat (obviously not racers). It is imperative not to over-mix. To apply the gelcoat with a brush, dip the brush in the gelcoat so there’s a liberal amount of gelcoat on it.
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