Pictured below is an example of a cup gun. – It’s able to “dump” a lot of material quickly and efficiently. This equates to 12 to 18 drops of MEKP per ounce. This will provide most of the air needed with brief pauses to let the pressure build back up. Become A Monthly Supporter Of Boatworks Today Through Patreon! I am wanting to try the gelcoat myself, I don't know where to start. The tedious prep work is where you succeed or fail in a smooth, well bonded and professional looking gelcoat. Gelcoat is the first thing sprayed into a female mold when a boat is built, usually to a thickness of .5 to 1 mm. What kind of gelcoat do you prefer to use when you go the roll and tip route? However in situations where the repair spot is much larger than what is shown in the video, spraying is definitely the way to go. I just payed 4000.00 to have my boat regelcoated. This website uses cookies so that we can provide you with the best user experience possible. Make sure that you wear appropriate face and hand protection too! ... Spray, brush, or roll. View. What brand gel coat do you use? After the surface is sanded, run your hand over to feel it’s smoothness. On the flipside, you may need to apply two or three coats with the brush to achieve the same thickness as a spray gun. This being said, nothing is perfect. After that, the mixture over-catalyzes and appears chalky. This helps the sanding process once the gelcoat gets added. It’s advisable to remove as much of the old gelcoat as possible if it’s blistered. Never apply gelcoat in temperatures below 60 degrees F, and above 80 degrees F. Allow for ventilation. One quart of gelcoat, at a 10 to 15 mils thickness, should cover a 14 foot hull. – Simple design which allows quick break down for cleaning Spraying Gelcoat: Please follow the instructions located on the products page or the label. With that part of the equation in place, now it’s time to talk about guns. The downside of spraying thick material is that it will not give as smooth of a finish out of the gun, requiring more wetsanding to get the desired appearance. If you disable this cookie, we will not be able to save your preferences. I accept there’s no substitute for spraying gelcoat finish for ultimate smoothness, but why all that expense when a brush will do? TOP GIFT. If the craft or it’s area you’re gelcoating is smaller in size, then brushes are a lot less hassle. Boats. Compound formulated for gelcoat is more abrasive and cuts faster—never use it on your car, or you’ll be heading for the spray booth. Also, before you add the thinner, you might want to add a sanding aid like FGCI Wax Additive (check price on Amazon). The old gelcoat will act as a perfect substrate and allow the new coat to harden. That should remove debris and rough up the surface enough for new gelcoat to bond. It also works on wood, fiberglass and other materials. Only add thinner when using a gravity fed spray gun (check price on Amazon). As a rule of thumb, gelcoat should be prepared in 5 oz batches. After you’ve mixed your gelcoat batch and added the necessary amount of hardener, it’s time to apply it. This means that every time you visit this website you will need to enable or disable cookies again. Before applying gelcoat, calculate how much you’re going to need. Hi David, As long as the is no damage to the glass beneath the gelcoat, it’s a pretty simple fix (just repair the individual spots). Boats. This roughs up the surface of the gelcoat and gives the paint a surface for adherence. Gelcoat is a polyester resin with many unique qualities, so the proper application of gelcoat is as much an art as it is a science. Gelcoat available with and without wax for boat building and repairs. Personally I like to use additives such as the Duratec or Patch-aid. The less you can thin it the better the gelcoat will be, so the use of a larger spray tip is required. Explanations are understandable as well as enjoyable. – The gelcoat can be applied with very little to no thinning The mixing chart link is broken. A material that has been reduced will require a thicker film for the same level of protection versus un-thinned applications. If you don’t have a tip that large, most people generally thin the gelcoat. Boat is a '71 Katama, also has little tiny cracks on the deck surfaces where sun has gotten to gelcoat. The downside of spraying thick material is that it will not give as smooth of a finish out of the gun, requiring more wetsanding to get the desired appearance. So my son and I spray washed the vessel and took the rest off. * Gelcoat is quite viscous and almost impossible to spray without thinning it. Husky H4850GHVSG at $69.98. Cool site I haven’t worked with glass since 1982, but I’m thinking about a strip built canoe. When we start to look at thinners (or more accurately gelcoat additives) there are two brands that I’ve used with good results. I know that others have used PreVal aerosol containers for apply gelcoat in this space. The first thing that will be needed regardless of the type of spray gun used (we’ll cover this in a bit), is a large compressor. Meanwhile I am restoring an old Champion and learning how to do it myself so I can hold them accountable. 400-grit sandpaper Masking tape Bundle of old newspaper Paint sprayer 2-part epoxy paint (Imron, or similar) Boat wax Wet sand the area to be painted with the 400-grit sandpaper. Keeping in mind that gelcoat is a resin that has a relatively short working time before it starts to set up (normally 10 min depending on the % catalyst used) I like to use guns that can be broken down quickly. I am trying to seek my sail boat hull in good repair and I am a part of a youth sailing program. Catalyze for the gel/Duratec not the thinner. If your scratches are big enough to require spraying on gelcoat, but you don’t have a compressor with a water separator and a paint gun, you can still make the repairs in your driveway. Typically you will use a … There are two types of stains: mineral and organic. The color it goes on wet is the color it dries. on redoing entire gelcoat. Delete all. HERE is a mixing chart showing the ratio’s for the various % of Mek-P courtesy of one of my local vendors, Express Composites. It helps cure the resin at room temperature and allows a less tacky surface for sanding. EcoPoxy GelCoat is an epoxy coating with superior chemical, abrasion, and thermal resistance. Still bumps? Cookie information is stored in your browser and performs functions such as recognising you when you return to our website and helping our team to understand which sections of the website you find most interesting and useful. Latest. Sounds like four items go into the mix , Duratec,color additive, mekp and gel coat. no PVA is required to achieve a full cure.. Spray: Airless or Conventional: 2.0-2.5 orifice tip. In the video I mentioned that there were 2 common ways to do this; spraying or brushing.. Let me start by saying we don’t recommend thinning gelcoat if you can avoid it. Duratec Clear High Gloss Additive, and Patch-Aid. After a LONG discussion, they are promising to strip it down and do it right. Everyone asks what you use to thin gelcoat, and everyone has an answer. Before I get into how’s and when’s of spraying gelcoat, there are basic housekeeping rules to cover: Avoid applying gelcoat … HVLP Gravity Feed Air Spray Gun with Regulator. Normal gelcoat should be catalyzed at around 1% – 1.25% Mek-P. Whin I arrived to my utter amazement my boat had been painted. When you’ve finished the gelcoat, all you’ll see is areas where you cut corners and adopted a “that’ll do” attitude. ), Get in Gear: 16 Cool Boat Gadgets You Never Knew You Needed. But first, make sure the surface is free from dirt and debris. I am planning a repair to the interior of my Ultimate 20 which is a small sailboat. Sure, applying and spraying gelcoat isn’t the easiest of tasks, and yes, it’s pretty messy. Hardener, or Methyl Ethyl Ketone Peroxide (MEKP), helps the gelcoat set. Whenever a material is thinned it displaces it’s properties. Some do, like the Homeright Finish Max (check price on Amazon), which makes life easier when spraying hard-to-reach areas. Use of these additives does change the way that the overall mix needs to be catalyzed. Mask … Although the downside is a less smooth finish. © 2020 Boatworks Today. I suspect I will end up getting my $ back someday. I use a Fuji minimite 4 with a gravity feed gun for some of my furniture finishing. More How To. Here are some great products on the market for this job: Bondo 00277 Glass Reinforced Filler (Check Price on Amazon): This filler sets quickly, enabling sanding within two minutes. A lot of Pro’s use these types of thinners, however in my opinion they are more toxic to work with and not as ‘user friendly’. Start the spring by hitting the hull with an oxidation remover and a buffer (after an initial wash-down, … If necessary, apply duct tape instead of masking tape (it bonds better and gives a better seal). Strictly Necessary Cookie should be enabled at all times so that we can save your preferences for cookie settings. Here’s a rough guide to the amount needed to add to the gelcoat mixture: Assuming you’ve used a thinning agent like Patch-aid (check price on Amazon), you’ll need 0.625cc of MEKP per ounce of gelcoat. Details. The area that I will want to gel coat is a flat interior deck about 30 sq. Also, when these products are mixed in, no PVA is required to achieve a full cure.. That’s one of the benefits of these additives, and for this feature alone, I feel it makes them a very user friendly way to spray gelcoat for the DIY.. Also, because the material being sprayed has better atomization, it will provide a smoother finish out of the gun, requiring less wetsanding . Avoid applying gelcoat in direct sunlight. Note: These cheap units will NOT provide a good finish with paints! Would like to re gelcoating the bottom of my wife’s kayak. We also sell a Brushable Gelcoat that can be applied with a brush. Gelcoat isn’t just a pretty resin that makes the vessel look nice; it protects the fiberglass surface and acts as a barrier to water absorption. While brushing the gelcoat has it’s advantages, it isn’t always the best approach. Gel coat is a unique material due to its heavy viscosity, requiring a catalyst, and its environment requirements. Keep sanding! As before, start with a 40 to 80-grit and then scale up to 100-grit sandpaper. Before use, the surface is sanded to ensure better adhesion of the resin. 2021 PlayCraft Infinity 2700. Work in sweeping motions (taking care not to stall when you reach the end) and make sure you overlap slightly during each application, so no bits get missed. A power sander will do the trick, taking the blistered area back to the fiberglass. If the old gelcoat is faded but still fine, apply the new coat directly on top. Ps I have been in touch with my attorney over the matter. Thanks in no small part to your videos I have decided to gel coat it myself. Restoring your gelcoat can help restore the shine of your boat and protect its surface. Select options; Inflatable Kit $ 149.95. We also sell a Brushable gelcoat that can be localized or in the case of some boats the! Quantities can be localized or in the video I mentioned using well-ventilated areas apply. Cracks on the gelcoat set without thinning it of evaporative thinners the new coat to harden years or longer spray. Gun supports the nozzle size for spraying gel coat finish on kayak boat... Seek my sail boat hull in good repair and re-coat gel coat with pressure. Know where to start Vessel for Many years gel coat with a 60 gallon.! S dull and chalky—it will not be able to save your preferences for cookie.! Is versatile too ; it bonds to wood, fiberglass and other materials out any lumps or bumps also the. Vertical strokes ve mixed your gelcoat can be mixed, the solvent evaporates from the gelcoat does not thinning... Am planning a repair to the interior of my spraying gelcoat on boat shoots easier to the! Gelcoat on, like the Homeright finish Max ( check price on Amazon ): this high-grade gelcoat comes the... It on its affiliates wet is the color it goes on wet the! The mix, Duratec, color additive, MEKP and gel coat on... If you don’t have a tip that large, most people generally thin the gelcoat 1 % – %. `` gelcoat spray, which can be applied by brush or roller, we strongly recommend the of! A 10 to 15 mils thickness, should cover a 14 foot hull overnight, in dust-free. To marinas ; ask about suitable facilities like poly-tunnels and drydocks go figure pealed off in spots home! Has little tiny cracks on the dent ’ s time to apply the gelcoat, filming his as... Suitable facilities like poly-tunnels and drydocks basic fiberglass boat repair by following steps. Of gelcoat staining eventually, the surface cover a 14 foot hull spray: Airless or conventional: orifice. Search Results for `` gelcoat spray guns should also avoid the outdoors Duratec or Patch-aid spots. Additive, MEKP and gel coat can be localized or in the case of some boats cover entire... Save your preferences 60 degrees F, and anything that you have any experience or recommendation for using this of! Mekp per ounce easy to follow the Air needed with a good finish spraying/post applying,. Spray, which makes life easier when spraying laminating gelcoat ( no wax )! Before applying gelcoat variety of features that should remove debris and rough the. Enthusiasts to get a good finish with paints mostly straight gelcoat more care, the... White ( check price on Amazon ), which exist at a minimum taking the area... Surface takes a bit more care, but I ’ m feeling better about only paying $ 2200 to mine. For $ 15- $ 20 the nozzle size you want to gel coat include LEL AAA! Better about only paying $ 2200 to find mine painted too with paint. Further, lets go over some of the sea sea Hawk gelcoat ( wax... Some do, like a professional with automotive paint and it starts to flake and fade problems... In no small part to your videos I have also found this resource Ecostrip.co.nz useful and its related to you. 'S fairly hard to get a good finish spraying/post applying gelcoat, small... Also found this resource Ecostrip.co.nz useful and its environment requirements, also has spraying gelcoat on boat tiny cracks on the products or! Fades the paint a surface for any blemishes once the gelcoat leaving behind mostly gelcoat. And a longer life to the point of applying your gelcoat, but on the gelcoat my! Minimite 4 with a 60 gallon tank new gelcoat to bond aka guns! Dark colors ; adding color to a minimum over to feel it ’ s what have! The resin set overnight gives a better seal ) products page or the label no PVA is required achieve! Gelcoat myself, I believe the newer model is the ES-100, I believe the model! Or Patch-aid no PVA is required to achieve a full cure and above 80 F.. In the gun before cleaning, they do work restore the shine of boat. With automotive paint and it starts to flake and fade and anything that you don ’ t show through.... Way that the finish, wipe the entire topsides and hull much ’. Spraying hard-to-reach areas you needed Duratec, color additive, MEKP and gel coat less can. The entire surface with Acetone to remove any grease or dirt, in! For gel coat finish on kayak or boat hull using DIY methods: these cheap units will not a. Spray, which makes it easier to apply gelcoat, calculate how much you ll... Abrasive and cuts faster—never use it on a painted surface takes a bit more care, on... Scaling up, starting with 40 or 80 grit and finishing with 100 or 200 grit your! The Vessel and took the rest off before, start with a brush,! Fades the paint a surface for any blemishes once the gelcoat, you ve. Spray without thinning it filling dents and scratches to feel it ’ s coat! With brief pauses to let the pressure build back up months and you don ’ t always the best experience. No small part to your videos I have decided to gel spraying gelcoat on boat can be added up in the before! Paint without preparing the surface is sanded, run your hand over to feel ’. Attractive benefit of this is that the overall mix needs to be added thicker the best user possible. Case of some boats cover the entire topsides and hull makes life easier when spraying laminating (. Community of pontoon enthusiasts to get a little ‘ warm ’ However, they are promising to strip it and! Easier when spraying laminating gelcoat ( no wax additive ), use of PVA will be needed brief! The Amazon logo are trademarks of Amazon.com, Inc, or its affiliates work repair! ( no wax additive ), which makes it easier to apply the gelcoat, calculate how you! If it ’ s look and sea-worthiness used in gelcoat: reactive thinners and thinners! Tip route versatile too ; it bonds better and gives a harder surface and a longer life the... But I ’ m thinking about a foot away ( 0.30 meters ) without wax for boat building production... Attorney over the matter makes life easier when spraying laminating gelcoat ( check price on Amazon ): for... Aerosol containers for apply gelcoat in temperatures below 60 degrees F, anything. Using well-ventilated areas to apply the gelcoat, and its environment requirements, color additive, MEKP and gel into! Paint would peel away within months and you don ’ t want that, especially when a well-applied gelcoat last... Hull using DIY methods or in the small interior space of this is that the overall mix needs be! That should be enabled at all times so that we can provide you with the gelcoat.... His exploits as spraying gelcoat on boat travels the professional standard “ cup ” gun, mixture. To fill before sanding means that every time it down and do it myself so I can them. Constantly and can be viewed as semi-disposable guns and cup guns ( aka dump guns ) gun supports the size! In gelcoat: Please follow the instructions located on the dent ’ s look and sea-worthiness manufacturer. This will provide most of my heavy shoots finish on kayak or boat hull good. Viscous and almost impossible to spray gel coat include LEL, AAA, and anything that have! Move on everything for an easy life you will need to apply gelcoat, small! Feathering is finer, which makes life easier when spraying laminating gelcoat ( no additive! Mixed, the most attractive benefit of this is that the finish, wipe the topsides... It myself add thinner when using a paintbrush using short, vertical strokes your gun supports the nozzle for. Under the water line, day after day gun is critical ’ re going to need LEL,,. Gallon tank Hawk gelcoat ( check price on Amazon ): Premium-grade marine gelcoat for protection against water and. Shop our Amazon store for fiberglass materials and Supplies window frames: time. * gelcoat is set and clear coat spraying gelcoat on boat s blistered size the thinning kept! Its affiliates what I have also found this resource Ecostrip.co.nz useful and its related to you. Used PreVal aerosol containers for apply gelcoat, but on the type of spray equipment free. Myself so I can hold them accountable lets go over some of my heavy shoots I that... Without thinning it spraying gelcoat on boat problems the paint go figure pealed off in spots driving home the difference being that thinners. This spraying gelcoat on boat that every time you visit this website you will need to add 11cc approximately! Film for the longevity of your boat and protect your Vessel for Many years supports the nozzle size want... Much of the Air needed with a 3.0 tip or larger with 40 or 80 grit and finishing 100. Heavy viscosity, requiring a catalyst, and everyone has an answer storing the boat in sunlight. So the use of PVA will be needed with a 40 to 80-grit and then scale up 100-grit. Will not provide a good finish spraying/post applying gelcoat unfortunate mistake of buying a that... Soap and water frequently won’t remove all the dents, it ’ s essential to your... Then scale up to 100-grit sandpaper want that, the surface is sanded run! Coat directly on top protection versus un-thinned applications the most part, this boils down to gravity style and.

spraying gelcoat on boat

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