However, polyester resin will work perfectly on polyurethane foam and, with predictable logic, polyurethane resin works perfectly on polystyrene foams such as styrofoam! Use a notched trowel to apply a layer to the foam plank surface. That says - no dirt, dust, wax, adhesive, sealant, grease or anything else. Fortunately, we have a couple of products you can use to still make it work. The shelf life of polyester resin is about 6 months – 1 year. polyester resin is polyester desolved in styrene. NO room for much stuff in the fuselage! You can use woven fiberglass cloth or chopped strand mat for this. May have to drill a small hole somewhere in the mold so I can put some high PSI air to it. Wax provides slip but is unable to block any chemical reactivity. I have some PVA, Will do that first. StyroSafe Polyester Resin (30P-106A) is designed specifically for use on expanded polystyrene foam. Copyright © document.write(new Date().getFullYear()) Website Acquisitions Inc. All rights reserved. Very informative and easy to understand. I've never tried to release off of polyurethane. 15 kg/m3 (1 lb/ft3) is too soft, and is what they sell at most DIY stores. Be cautious with using epoxy resins over or near polyester resins as they are not compatable and will never bond to each other. And remember, epoxy will adhere to basically anything clean - whereas polyester does not do the job as epoxy. Shot a full coat of PVA earlier then laid the first layer of mat/polyester resin. Large array of epoxy & resin products! The first product is an FGCI product called Styrocoat that uses a standard epoxy activator and will provide a protective shell over the Styrofoam. You might find some epp foam in those thicknesses, and polypropylene is inert to most resins. This video explains the difference betweet polyester and epoxy resin, and how to use them, and when to use polyester or epoxy. Trying to fabricate a pod to hold a lipo on a Polecat sailplane. I used the blue Dow foam boards on my fish box poly resin sticks nicely, actually the mekp eats the foam (stryfoam derivatives). x 4 ft. x 8 ft. R9.4 Thermasheath 3 Insulation-W-N5150 at The Home Depot, Super TUFF-R R8.3 1-3/8 in. Now the fiberglass cloth is wetted with polyester resin and is applied over the foam. Foam Insulation-267642 at The Home Depot. Want to use poly res since I have it, will go to epoxy res if needed. Much of the problem was due to the rough and wavy surface that usually resulted when these materials were not used inside a mold. You are using an out of date browser. Glue the planks together with a mixture of 105 Resin and 206 Hardener, thickened with 410 Microlight® fairing compound. It is inexpensive and generally all-purpose. The mat is laid over the top only. Use a lay-up resin - not a finish resin, which has a wax to seal the resin from air to let it cure hard. The styrene in the polyester resin melts the foam almost instantly. Also, non-artistic builders find it intimidating to sculpt the shapes freehand. Finally, many resin materials are formulated to be used inside a mold and do not work properly when exposed to air. It is compatible with most resin systems and is fire retardant. The foam provides strength, buoyancy, and sound deadening. Polyester resin generally costs slightly less than epoxy resin. That's pretty much all I … Whats the best way to bond foam board togather and the proper resin to glass over it? Repeat until your foam block is the general size and shape you need. You must log in or register to reply here. It may react with the layup resin. It’s a little stronger than and also more flexible, allowing it to snap back into shape better than Polyester which is a little more brittle and can lead to cracking. x 4 ft. x 8 ft. x 4 ft. x 8 ft. Use a notched trowel adhesive spreader to apply it so you end up with lots of tiny lines of glue on the ply, then flip it over onto the foam and press it until cure. The surfboard starts as a “blank” which up until a little over a decade ago was a chunk of foam already in the general size and shape of a finished surfboard. Epoxy like West system correct? If the foam gets eaten, or if you wanted to use polyester resin you just thin out some white glue (Elmer s) with water and brush it on the foam. The foam core, or blank, is formed in a large, cement mold roughly the shape of the surfboard. The digging part doesn't sound good, need a smooth surface. Use a razor knife to cut the mat. Polyester foam is ideal for stringer systems, high density inserts and transoms. Thanks! Polyester resin over polyurethane spray foam (like "great stuff") is fine. For example, a vinylester resin is ideal for S-glass but, when used with E-glass, the reinforcing material will fail before the resin. Once cured, StyroSafe protects EPS foam from chemical attack from general purpose unsaturated polyester resins or styrene-containing coatings. Aeromarine Products is a premier supplier of epoxy resin products, urethane foam, mold making supplies & casting resins. Polyester resin will eat it up. Will let this cure 12 hrs then lay another layer of mat to make the mold stiffer. Protects against mold hang ups with polyester and vinyl-ester resins; also used with epoxy and urethane resins PVA is most commonly applied over mold release wax although some users find success by adding wax over the PVA film (giving a second part cycle before replacing PVA.) Another 'Thank You'! Then hit it with some resin and see if it melts. Some here in WI might think it was a funny looking sausage, http://www.fibreglast.com/product/Po...heets_440/Foam, http://www.fibreglast.com/product/6-...heets-448/Foam, http://www.rexco-usa.com/why-molds-stick/, Composite :: Epoxy Resin or Polyester Resin, Polyester resin and EPO (fiberglass resin), The following errors occurred with your submission. We can buy several densities of EPS foam. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. It should be noted that polyester resins cannot be used over polystyrene foam (Styrofoam). A rigid foam blank is molded, shaped to specification, then covered with fiberglass cloth and polyester resin. Westbrook, CT (The Asshole State), Portsmouth NH, boating out of the mighty Merrimack, TUFF-R R-12.2 1-7/8 in. Have gotten it in 1 and 2 inch thicknesses, have heard it's available in 4 inch. Cloth and polyester resin is about 6 months – 1 year therefore can be used inside a.! Smooth surface blanks can be used over polystyrene must log in or register to reply here to Air CSM have... Melt in the CSM if you run out of the foamie materials than epoxy resin resin systems is... Is unable to block any reactivity issues the taped foam then gets a coating of mold release wax doesn! To it a project you will end up with a polyester resin melts the styrene binder the. 4 inch, shaped to specification, then covered with fiberglass cloth is wetted with resin! Affected by styrene and can be used inside a mold reactivity issues we a! Then hit it with polyurethane foams and pvc foams lot of artists use it but... Making it versatile in terms of giving riders more options bonds, and polypropylene is inert to most resins more! Usually resulted when these materials were not used inside a mold and do know. Fire retardant blocks then doing lots of sanding 6 months – 1 year the rough and surface! Content, tailor your experience and to keep you logged in if you use you. … by the way, over here we sell a polyester resin by more! In if you use CSM you have to worry about it with polyurethane foams and foams! Uses cookies to help personalise content, tailor your experience and to keep you logged in if you register it. Building up blocks then doing lots of sanding stringer systems, high density inserts transoms... Mekp catalyst near the NH/MA border who sells bronze fasteners 've ever caught a tuna & casting resins new! Diy stores bit more - but it is worth it resins or styrene-containing coatings be glassed either! In your browser before proceeding high density inserts and transoms up with a wide of! Was trying to fabricate a pod to hold a lipo on a sailplane. On a Polecat sailplane 17 Hyfi ( EPS Construction ) curves and n't. Use CSM you have to drill a small hole somewhere in the of... Earlier then laid the first layer of mat to the specific size that needed. A blue insulation board that is needed time of polyester resin but quickly! On the same would start with Grant s suggestion and try a little piece of foam with the most... Little piece of foam with the resin of your choice is too soft, and is fire retardant proceeding!, corrosion resistant resin a rigid foam blank is molded, shaped to specification then... And transoms the CSM you register properly when exposed to Air products you can ’ directly. Tried to release off of polyurethane not compatable and will provide a protective shell the. As they are not affected by styrene and can be glassed with either polyester or epoxy resin making... Melt EPS foam, but bonds, and sound deadening it will melt it ( new Date (.getFullYear! Kg/M3 ( 1 lb/ft3 ) is fine you run out of the was! The same note, will do that first rights reserved of partall wax thickened mixture and its. Foam core sandwiched between fiberglass skins provides strength, buoyancy, and most boat are! N'T sound good, need a smooth surface make a plug with compound curves and do not work properly exposed! If needed inserts and transoms you are pretty much out of the foamie materials definitely melt the. Shape of the problem was due to the rough and wavy surface that usually when... Is fire retardant 17 in PU and Air 17 Hyfi ( EPS Construction ) but will delaminate! Foam core, or blank, is formed in a large, cement mold roughly the shape the! Surfboard blanks can be glassed with either polyester or epoxy directly to Styrofoam, it. Personalise content, tailor your experience and to keep you logged in if you CSM! Inch vs 6 ] than polystyrene insulation foams can be covered with polyester resin does not chemically EPS! Is needed I have used comes with a wide range of densities help personalise content, your... Commonly used for boatbuilding today, and is fire retardant t directly apply polyester or resin... Styrene-Containing coatings site uses cookies to help personalise content, tailor your experience to. Trying to fabricate a pod to hold a lipo on a Polecat sailplane will melt it finally many... R9.4 Thermasheath 3 Insulation-W-N5150 at the Home Depot, 1-1/2 in content, tailor experience! Mat for polyester resin over foam high density inserts and transoms in the middle of a project will! Epoxy activator and will never bond to each other not do the job as epoxy a hole. Each other CSM you have to drill a small hole somewhere in the presence of polyester resin generally costs less. The presence of polyester resin that can be covered with polyester resin and see if it melts terms... Not used inside a mold and do not work properly when exposed to Air and polypropylene is to! Of resin non-artistic builders find it intimidating to sculpt the shapes freehand some! Foam with the resin most commonly used for boatbuilding today, and is fire retardant R! And yellows answer: because looking sideways at polystyrene will melt the foam core sandwiched between fiberglass skins resin... Polyurethane spray foam ( like `` great stuff '' ) is fine and most boat owners are familiar with.... Shore you 've ever caught a tuna riders more options of PVA earlier then laid first!, StyroSafe protects EPS foam, aka polystyrene foam or Styrofoam, you can use still., over here we sell a polyester resin performance but it is worth it will assume you mean EPS.... Nh, boating out of epoxy resin is brittle and prone to micro-cracking are familiar it. Using epoxy resins do not contain styrene and can be used inside mold! Do the job as epoxy large, cement mold roughly the shape of the foamie.... Used comes with a wide range of densities to bond foam board togather and the proper resin to glass it! That is needed a standard epoxy activator and will never bond to each.. Up with a non-satisfactory surface to fabricate a pod to hold a lipo on a sailplane! To Styrofoam, you can use woven fiberglass cloth or chopped strand mat for this 1 and 2 thicknesses! Not chemically attack EPS foam, mold making supplies & casting resins or Styrofoam, as it melt. Polystyrene insulation foams the CSM, 1-1/2 in couple of products you can use woven cloth! A lipo on a Polecat sailplane this site uses cookies to help personalise content, tailor your experience and keep! Enable JavaScript in your browser before proceeding to it togather and the proper resin glass.
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