Thread: sealing plywood

Originally Posted by bigbear

Anyone recommend a product to seal a plywood floor, also would like to use the same product on ply walls. A easy to use and easy on the wallet product would be nice. Just after a clear finish like vanish but a product that doesn't go yellow.

Either water based or oil based aliphatic urethanes are non yellowing but exposed to sunlight even briefly pine will yellow, and other timbers like cedar will bleach. On a floor oil is a bad idea, it gives no protection to the timber and depending on what its thinned with can cause delamination or if in a damp area possibly mould.