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PO Osmosis Primer is a one-pot polyurethane resin, which hardens by reacting with moisture in the air. PO is easy to use in most weather conditions (temperatures above 0oC).
Applied onto a hull in multi-coats, it highly reinforces the watertightness of gelcoat and is a very efficient osmosis prevention system.
After only one coat, PO is a very efficient adhesion primer.