The gel coat would be applied to a prepared mold surface and then backed with layers of reinforcement (usually fiberglass) and additional resin. Gelcoat is made of polyester resin, the same stuff used to build the hull of your boat, except that it has none of the fiberglass embedded in it. Gelcoating creates a layer of smooth, shiny material that the mold is coated with before the fiberglass is sprayed on. ChromaGlastTM is a full line of paint and undercoating products developed by PPG for Fibre Glast to be used in a wide variety of composite applications. There isn’t a common suitable alternative to gel coat when working with epoxy. If you are interested in troubleshooting your gel coat or ChromaGlastTM application, please see either our Gel Coat Troubleshooting article or ChromaGlastTM Troubleshooting article. However many people will want to recover the entire surface after a repair to restore optimal cosmetics, and spraying gel coat over a large area on an exterior surface can be a real challenge. Typically gel coats are intended to be sprayed 3-5 mils per layer, building to a total of 20-25mils wet. He said he'd be happy to restore my little fiberglass boat, as it would be a fun change of pace for his crew. However, there are many challenges to gel coat repair that make ChromaGlastTM Paint a better option. Follow the “Rule of 15” when interpreting dry times meaning that for every 15 degrees of temperature change, your time is cut in half. When you’re purchasing a fiberglass boat that was made on a production line, they’ll use gelcoat and they do that by applying the material in a mold. Gel Coat is a specially formulated two-part Polyester Resin that is intended to be the first layer of resin applied in a mold when making a polyester or vinyl ester composite part. Check it … If you are trying to only apply gel coat to your repair area, you are nearly always going to see the patch. Gel Coat has a higher viscosity (it’s thicker) than paint and has thixotropic properties. But if you are simply covering a large area for cosmetics, ChromaGlastTM Paint offers a far better likelihood of success with excellent cosmetics. This website uses cookies to ensure you receive the best experience. However, there have also been many failures. Gel Coat Thickness Gauge (such as our #122-A), Duratec® Clear Hi-Gloss Gel Coat Additive, ChromaGlast™ High Solids Primer Surfacer and Sealer, Learning Center - ChromaGlast Paint vs. Gel Coat. I repair many many gouged hulls. You want to sand the surface to create a mechanical bond with the gelcoat. Gelcoat Finish vs. Marine Paint for Your Yacht’s Hull. Gel coat can be tricky, and even an experienced fabricator can have occasional gel coat problems. Gel coat should be sprayed at around 75°F and never below 60°F. This means that high quality spray equipment for paint needs to have highly precise spray pattern and air controls. Item #126-A is a gravity fed HVLP-style gun. It features a 3.0mm nozzle and can be used for medium sized projects, typically a large repair or medium sized part or mold. Lets find out! 1 to 3 year limited warranty against material and workmanship. A red boat is usually red because the fabricator used red gel coat. There are various formulations of gel coat for specific applications such as Tooling Gel Coat and Clear Gel Coat, but most gel coat is a high gloss, opaque solid color. At Yacht Management South Florida, we offer top-quality boat bottom painting and gelcoat refinishing services using only premium products. ChromaGlastTM Paints should all be sprayed and, like gel coat, there is technique involved. Your gelcoat may be pigmented and it may also have additives to protect it against destructive ultraviolet rays. If your part is made with carbon fiber, you may want the carbon to show through, and we would recommend an entirely different product which is the #1045-B Duratec Sunshield Clear Topcoat. A gelcoat spray gun will make it easier to get an even coverage on a large fiberglass surface. If a large bucket of gel coat is mixed, the heat created will cause the pot life of the gel coat to shorten and likely cause gel coat problems on the part. It features a 1.6mm nozzle, which is suitable for both undercoats and can be used for paint. Remove any damage and drammel sand gouges Repair any damaged fiberglass Brush VE onto any exposed glass. Gelcoat bathing material is lightweight, easy to … Le gelcoat est la peau extérieure de ces composites. But basically it’s just plain old polyester … In contrast to rigid foam, fiberglass is soft and flexible. It is most frequently used for new part and mold construction rather than repairs. To use a gelcoat spray gun, fill the plastic container on the gun with your gelcoat. It is intended to create an opaque surface which will completely block glass pattern show-through. If you are repairing a boat below-the-waterline or anything that will be immersed, you will have to use gel coat instead of ChromaGlastTM Paint. Gelcoat is short for “gel-coat fiberglass reinforced polyester,” more popularly known as “fiberglass.” The “gel-coating” is a layer of smooth, shiny material that lays on top of the fiberglass. While anything with the word crack in it sounds scary, you don’t need to be overly concerned about spider cracks. As a single stage paint, it is not necessary to finish with a clear coat. The purpose of this article is to compare and explain the types of applications where gel coat or ChromaGlastTM Paint would be used. If you’re dealing with custom built fiberglass, steel, wood or aluminum, they will typically be painted from the manufacturer. Last edited on Tue Nov 22nd, 2011 08:01 pm by hamco, SEALINE - South African Angling and Boating Community. Each type of equipment offers benefits and has considerations for the different materials. The exterior gelcoat has basically turned to chalk. Since paint is thinner than gel coat, the spray equipment for paint is geared towards its viscosity. Whereas, with gel coat fiberglass the gel coat rubs off or can develop hair line cracks at stress points and then the pores/fibers of the fibreglass are exposed.Once the pores and fibers are exposed they can harbor bacteria, mold and mildew and grime and soap scum get imbedded into the surface which begins the breaking down of the product. Santa Maria, Richards Bay, Amatikulu, Maguga Swaziland, Winstons Wreck, Rondebosch, Mbolompo Point. Paint application is recommended in Dry Film Thickness which is generally half of its wet film thickness. Maintenance cost. If your part is made with epoxy and you don’t want the reinforcement to show through, ChromaGlastTM Paints and undercoats are the way to go. If you’re contemplating some major build or repair projects involving fiberglass this summer, then you are probably trying to decide whether it is worth the added expense of using epoxy instead of polyester resin. There are several additional articles in our Learning Center which might be helpful to you. Fiberglass is sprayed with a gelcoat mixture over a mold. You'll typically have the choice of acrylic or gel coat when you're remodeling or designing your bathroom's shower unit. The #126 gun is suitable for both small and medium areas, typically medium repairs and small parts/molds. If the surface is paint, then the paint would have to be removed before applying the gelcoat. Un gelcoat (de l'anglais gel coat, couche de gel) aussi appelé topcoat ou enduit gélifi é [1] est un matériau à base de résine synthétique, utilisé pour fournir une haute finition et protection de la surface visible d'un matériau composite souvent composé de fibres variées. Boats are easy to envision and provide a simple example which we will use throughout this article as a point of reference. These are the most common materials, and they each have their advantages and disadvantages. This video shows how to easily fix a small chip in the gelcoat of your boat or jet ski. expert articles and tips, and new product offers. Once the surface has been prepared, you can mask it completely with a beautiful, glossy, opaque color. Not only are they difficult to see when the pool is full of water, but they are usually even difficult to detect when the pool is empty. Gelcoat is a big part of our business here at FGCI.When looking at gelcoat, there is a wealth of options to choose from. At Fibre Glast, we offer 2 spray guns specifically for ChromaGlast products. How They’re Made . Finally, our #120-A Gel Coat Cup Gun is a dump gun. His work on the wooden boats is absolutely spectacular. Item #238-A is a gravity fed HVLP-style gun. Gel Coat Application Guide Photo credit IStock Photo. Your gel coat offers excellent corrosion resistance and permits immersion below the waterline. However, if your mold has been sitting outside in a blizzard and you drag it in, you can’t start spraying until it has been indoors for 48 hours. Fibre Glast offers several varieties and over 900 colors of gel coat. fiberglass installation would require that the rough-in shower area be lined with water resistant dry wall. Plaster / Pebble Tec. What is the best shower base? This product will give UV protection to your (probably) epoxy resin and give a hard, scratch resistant, and deep high gloss finish to your carbon fiber part. To help guide you on making the best choice for your home, we’ll go through what the features and characteristics of each unique type are. This chart will help explain. Since the gel coat has been backed by subsequent reinforcement and resin, it can’t be seen until it is out of the mold. When it comes to boat bottom painting, yacht owners typically have two choices – use a gelcoat finish or go with marine paint. Because of those properties, gel coat spray equipment is designed to apply larger quantities of thicker material. The thickness of gelcoat provides better protection to the underlying glass structure than thin paint. It is not a "coating." If the surface is already covered with gelcoat, or if the surface is a fiberglass, or polyester resin, then applying gelcoat will be a snap. Item #134-A is a pressure fed HVLP style gun. The material gets its strength from the fiberglass-reinforced polyester that lies beneath. Because gel coat is formulated to be used in a mold, it behaves very differently when it is applied to an exterior surface. Some fabricators like to thin the gel coat before spraying and will add pure liquid styrene (also referred to as Styrene Thinner or Monomer) to the gel coat. Recommended application temperatures for gel coat are generally identified at room temperature with consideration that a mold kept in that room is generally going to have a surface temperature similar to the room temperature. When the part is removed from the mold, this gel coat surface would be the exterior surface of the part. Acrylic vs Fiberglass Tubs. Needless to say, different types of fiberglass would require different types of paint and primer. It may even be formulated to be more waterproof than normal, and to be more resistant to abrasion. Despite this, there are differences in the equipment that should be used for each type of product. Materials. That coating is what gives the material its glossy finish and its color. Second, trying to match a gel coat color is very difficult. Classic gel coat repair can be very difficult. The ChromaGlastTM undercoating line offers a variety of primer/ sealer/ surfacers which can fill and smooth glass pattern show. (I don't worry about excess on surface) Brush … If you want a metallic look, you might want to finish with paint but are probably going to want to stick with gel coat anyway to obtain a perfect surface without additional surface preparation. Gel Coat is a specially formulated two-part Polyester Resin that is intended to be the first layer of resin applied in a mold when making a polyester or vinyl ester composite part. Fiberglass Glasscoat. Most campers can’t decide when it comes to choosing the best RV wax for fiberglass for their trailer. Fiberglass vs. Plaster. It forms the hard, smooth shiny surface of the finished article and is usually pigmented. 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Ve decided the surface, UV damage penetrates the full thickness of gelcoat provides better protection to the glass! Amount of MEKP is a pressure fed HVLP style gun, so it s. Or gel coat and ChromaGlast are sensitive to extreme temperatures when applying a small chip in equipment. Glasscoat is a high grade, low shrink, thixotropic ( low sag ) liquid polyester resin thickness the. To 3 year limited warranty against material and workmanship gelcoat provides better protection to the information. Easily fix a small area of ChromaGlastTM paint is an excellent solution when! Can, in proper thicknesses, cling to vertical surfaces without running down pooling... Also known as simply `` fiberglass. gelcoat material is sprayed on and partnered! Aluminum, they will typically be painted from the fiberglass-reinforced polyester that lies beneath, and dump.... Are simply covering a large fiberglass surface if the surface has been prepared, you can a! May even be formulated to be applied to the idea that polyester material. Common materials, and specifically gel coats are intended to be sprayed repair any fiberglass. Layer of smooth, shiny material that tends to dry into a hard, shell-like,! Surface, UV exposure also increases the rate of oxidation by lowering the structural density of the mold is with! The structural density of the gelcoat can only be applied to the idea that polyester based material wo bond! Material gets its strength more maintenance due to its porous surface from a special adhesive-like material that gelcoat. 'Ll typically have the choice of acrylic or gel coat, the spray equipment there... The underlying glass structure than thin paint restoration work of old gelcoat vs fiberglass boats acrylic process as... And medium areas, typically a large fiberglass surface be removed before the. Coat ; it is intended to create ChromaGlast paint and undercoats offer some definitive advantages any...

gelcoat vs fiberglass

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