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I have an aluminum channel I need to stiffen. I'd like to do this with epoxy/flox, foam and fiberglass. Answered

The channel is long enough to twistAfter slathering the mixture around the foam in the channel Do I wait for the epoxy/flox mixture to dry before applying the fiberglass strips? Will the epoxy bond to the aluminum without specific surface prep? Thanks in advance

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orksecurity

7 years ago

I presume switching to steel channel, or thicker aluminum, or solid rather than channel, aren't options...?

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frollard

9 years ago

it couldn't hurt to rough up the surface of the aluminium to aide in adhesion. Most epoxies should stick to aluminium. Polyurethane foam - read the instructions to see if it needs to out-gas to harden, or if its chemically hardened with a catalyst. If it comes from a can it probably needs SOME contact with air to harden/cure. What are you stiffening? Join instructables and post whatever you build!