Temporary Floor Sealing

[OldGMJon]

Originally Posted by Improbcat

You don't need to use POR-specific fiberglass mat, any of the chopped-strand type fiberglass mat will work.

Do all your rust grinding & surface prep, then trim a piece of the mat to cover the holes and overlap onto good metal. Lay down a coat of POR on both sides of the metal as usual, then lay the mat on a plastic covered surface and brush it with POR on both sides, forcing the POR into the weave. Lay this over the still-wet POR on the metal, and use a POR covered brush to force any air bubbles out and the mat hard against the metal. Wait for the POR to dry and put another coat of POR on both sides to seal the mat & metal together.

Be aware that you are going to have to cut out the entire POR & mat section and weld in new metal as there is no way to remove this fix from the metal for welding.

Thanks for the details...I was under the assumption that POR 15 worked best on rusty portions because it reacted with the rust. In your explanation you grind the rust off. Do you lose any of that reaction by doing so?

[Jcox68rt]

You just need to get the heavy scales stuff off and get it prepped according to por15 directions so it will adhere well.

[OldGMJon]

Originally Posted by Jcox68rt

You just need to get the heavy scales stuff off and get it prepped according to por15 directions so it will adhere well.

OK I see what you mean now. Thanks for the info...