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Royston A51 and Tapecoat TC Mastic are thixotropic, brush applied coal tar coatings for below grade applications. A time proven coating technology for providing corrosion protection to metal fittings, flanges, valves, tanks, mechanical couplings, anode connections and other difficult and irregular configurations. They are also designed to protect concrete surfaces from adverse environments.

A51 and TC Mastic are easy to apply by brush or rubber glove. Due to their thixotropic nature they resist drips and sags during application, but will become more flowable the more they are brushed. The A51 and TC Mastic can also be sprayed via air or airless sprayers. The A51 and TC Mastic may need to be thinned for spray applications below 60°F, contact a Chase Representative for more details.