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what can I use for a releasing agent for fiberglassing

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what can I use for a releasing agent for fiberglassing

Old 09-24-2017, 07:10 PM
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Default what can I use for a releasing agent for fiberglassing

guys, I would like to mold an air scoop for my ShoeString, thought it would look cool,, so I'm just wondering what you guys use for a releasing agent for Polyester and Epoxy , I'm wondering if there is some home made trick I can use instead of having to buy 195 times the amount than I actually need

thanks guys !!

Jim
Old 09-24-2017, 09:05 PM
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PVA. Stands for poly vinyl alcohol. Places like Fiberglast Products sell it in quarts, and yes that's a lot of material, but not exceedingly expensive. If you can find a modeler who works in fiberglass, or a fiberglass fabrication shop you might could "bum" enough for your project. You would benefit from studying a good tutorial on mold making, which would explain, materials, techniques, processes, and procedures. Fiberglast Probucts has books, and videos. I've been doing it for 40 years, and I'm still learning. You might post further questions in the "Composite" thread.
Old 09-25-2017, 03:54 AM
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Carve a plug out of foam, and glass it. Dissolve the foam with solvent, and you'll have your scoop.
Old 09-25-2017, 12:04 PM
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With epoxy resin and a smooth form paste wax works very well. First try it on the bottom of a bottle or something that is no loss if you screw it up. D.H.
Old 09-25-2017, 03:43 PM
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Super simple: shape your part out of purple project foam from Home Depot, aka insulation, comes in 2x2 foot x 1 inch panels. Shape the part and then use packing tape to cover it. Wet lay up on top of the tape is possible with no release agent or wax and you will get a gloss finish part. Use 3/4 ounce cloth and veil cloth to make a nice part
Old 09-25-2017, 03:57 PM
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Carnuba wax, PVA and Moldese Spray release will all work by the way.

Photos show my latest quick part using foam and tape, it's a duct.
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Old 09-27-2017, 09:54 AM
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For a one off part, I carved it out of a piece of pine I had on hand. Sanded smooth, clear coated, sanded, cleared. Sanded. Then I used modeling clay, pressed the wood into the clay, made a nice clean impression, put the wetted out glass cloth in the clay mold. When cured it popped out with very little water clean up. A spray can of mold release is about $8.00, tin of carnuba wax is even less.


Buzz.
Old 09-27-2017, 11:11 AM
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For multiple small parts..make the part out of foam, wood, spackle ,automotive, body putty ect..wax with simonize then cover with silicon rubber (if need be reinforce so the silicon doesnt deform after removal) then after curing remove "plug" The silicon is now a reuseable mold..no release agent needed.
Old 09-28-2017, 07:39 PM
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thanks for the info guys !! it helps !!

Jim

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