SigmaDur 520 Tar Based one coat should do the

one coat should do the job

Setting time: more than 4 hours

AndCoat is recommended for use with the AndCoat range of protective topcoats

test adhesion or consult Thermoguard

fully weathered and/or very porous: Primer

SigmaDur 520 Tar Based one coat should do thePPG SigmaDur 520 High Build Semi Gloss Polyurethane Finish PPG SigmaDur 520 is a two component, high build aliphatic acrylic polyurethane finish designed for long term durability in industrial and marine environments. Offering excellent resistance to atmospheric exposure, it can be recoated an unlimited number of times, even after prolonged weathering, making it highly suitable for maintenance programs. This tough, abrasion resistant coating provides