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Hartse25 wrote:... do I need to skin it with another piece of wood, like an 1/8th inch luan. Or can I just put my waterproofing and finish on my 3/4 or 1/2 inch plywood that I use for my side walls?
GPW wrote:We actually like applying "the mix" to wood in several coats, only because we’ve been doing this for decades and it WORKS !!! The PROPERLY Thinned mix , 75% Mineral Spirits , and 25% Polyurethane varnish .. is just the right consistency to really sink in DEEP into the wood ... Other thicker preparations only linger near the surface and ultimately do Not completely protect the wood over time ...
And second, if I use this mix on wood before skinning is there been any issue with adhesives like PL premium or even TB finding traction on the sealed surfaces?
tony.latham wrote:And second, if I use this mix on wood before skinning is there been any issue with adhesives like PL premium or even TB finding traction on the sealed surfaces?
TBII glue, applied to bare wood and clamped, is stronger than the wood. The wood will fail before the glue line fails. (Of course this doesn't apply to butt joined pieces).
I don't believe you'll get anything that approaches that with wood that has been sealed with the mix and then sanded to give it tooth. I think it's similar with PL Premium (and I use a lot of it but have not tested it on poly'd wood). You just can't beat the fact that adhesives are taken into bare wood with capillary action and clamp pressure.
Join your wood. (Fit, glue, and clamp –or screw) Then apply the mix. It'll soak into any voids in your joint and aid in the adhesion. Polyurethane finish is a fairly decent glue.
Tony
p.s. PL Premium uses moisture in the wood to cure.
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