I’m building some outdoor furniture, mainly redwood, and I’d like to use plates for speed and strength. The obvious problem is that the method normally uses a water soluble glue to swell the plates, and all of those glues I’m familiar with are not waterproof. Can I get away with using polyurethane glue or should I stick with loose tenons and the required jigs ?
Steve
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Many PVA adhesives are rated ANSI Type II water resistant. "Water resistant" means it will maintain adhesion when the joint gets wet. It's not good for joints that are continually and totally submerged. That's the definition of "water proof".
That said, Titebond II is rated ANSI Type II water resistant and is perfectly suitable for outdoor funiture. In fact, that is what it was designed for. If you want to spend the money, Titebond III is rated as rated as "waterproof".
Thanks for the advice. I'll give it a shot.
Titebond III is rated waterproof, Titebond II is water resistant
There is a lengthy discussion going on in Breaktime about glue failures that applies to your situation.
http://forums.taunton.com/tp-breaktime/messages?msg=68318.1
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