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I have some 1/4" aluminum plate I will be gorilla gluing on the backside of a HDU Foam sign. The aluminum is not primed (mill finish) should I prime it first or will I get better adhesion unprimed? Thanks!
-------------------- Bruce Crawford Crawford Sign Co. 9217 Bechtel Road Elyria, Ohio Posts: 69 | From: Elyria, Ohio USA | Registered: Jan 1999
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My inexperienced opinion is: 1. degrease it & wipe it clean 2. scuff it with a scotchbrite pad 3. wipe it clean again, then glue it
If you're lucky it may stick without a cleaning or a scratching, but if in doubt, test a small sample in the workshop, then a couple of days later, put half of it in a vice and hit it with a hammer & see if it separates at the join or elsewhere...
-------------------- "Stewey" on chat
"...there are no limits when you aim for perfection..." Jonathan Livingston Seagull Posts: 7014 | From: Highgrove via Toowoomba, Queensland, Australia | Registered: Dec 2002
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I'd suggest using epoxy. It's much tougher than Gorilla glue and doesn't expand while drying. And do what Ian says.
-------------------- Joe Crumley Norman Sign Company 2200 Research Park Blvd. Norman, OK 73069 Posts: 1428 | From: 2200 Research Park Blvd. | Registered: Sep 2001
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Ian, thanks for the info, that was my thought but its nice to have a little re-enforcement. Joe do you have a brand epoxy you would recommend? Thanks again
-------------------- Bruce Crawford Crawford Sign Co. 9217 Bechtel Road Elyria, Ohio Posts: 69 | From: Elyria, Ohio USA | Registered: Jan 1999
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I don't have a preferance. I've tried Wess, Precision Board, Mass as well as others. I can't tell any difference. They cost about the same.
-------------------- Joe Crumley Norman Sign Company 2200 Research Park Blvd. Norman, OK 73069 Posts: 1428 | From: 2200 Research Park Blvd. | Registered: Sep 2001
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Bruce, I would drill a series of random holes (1/4" or 3/8")in the aluminum plate. The glue will "ooze" through them and will make a much better bond!
-------------------- Tony Vickio The World Famous Vickio Signs 3364 Rt.329 Watkins Glen, NY 14891 t30v@vickiosigns.com 607-535-6241 http://www.vickiosigns.com Posts: 1063 | From: Watkins Glen, New York | Registered: Sep 2001
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Another vote for epoxy. Scratch up the aluminum, everything clean, then glue. I just don't like the way Gorilla glue expands in that application.
-------------------- Dave Sherby "Sandman" SherWood Sign & Graphic Design Crystal Falls, MI 49920 906-875-6201 sherwoodsign@sbcglobal.net Posts: 5396 | From: Crystal Falls, MI USA | Registered: Apr 1999
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