rcguy1958
50cc
Foam Tac & Welders work the same way, but the Welders isn't safe around Depron or EPS foam, only EPP. To use it like a contact cement, put a thin bead on one side, push the two sides of the repair together to spread it out, then push it together and pull it apart a few times until you see it making "hairs". If it's a tear in the center of an area, after making the "hairs", just push the tear back together making sure the outer edges are flush to one another and let it dry, 30 - 45 minutes. if it's 2 separate pieces, after making the "hairs", let the pieces dry separately from one another for about 5 - 10 minutes, make sure you've got them lined up straight and push them together, it should grab tight like contact cement, and let it dry another 20 minutes or so. To make hinges with it on flat foam, one side beveled 45*, butt the two pieces together with the bevel facing down, put a 1/8" bead down the butt joint line, then take a straight edge razor held on an angle to "squeegee the foam tac or welders out as thin as you can. Allow it to dry about 1 hour and you should have a nice ,soft flexible permanent hinge on the foam (takes a little practice, but once you get it figured out, makes putting profiles and flat foam wing scratch builds together fast)
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