This 4 fl. oz. (119 ml) bottle of Catalyst significantly improves the water resistance, solvent resistance, abrasion resistance, and mar resistance or our Waterborne formulations. The catalyst also improves adhesion to specific substrates. Just mix the catalyst 5% by volume to get high-strength cross linking at room temperature. This version of catalyst has a health rating of 1 and offers a 8 hour pot life and high-strength cross-linking action. This 1 fl. oz. (30ml) polyethylene bottle has a screw-on lid.