Roskote A-51 Plus Low VOC Mastic, 1-Gallon Can, by Royston

Totally Resistant to Aliphatic Hydrocarbons. Easiest to Apply (even in severe weather). Multi-Application Versatility For Any Oil/Gas Line Surface. Finest Engineered Thixotropic Viscosity. For use in CA and AZ

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.

Recommended Use
Appropriate for coating fittings, flanges, valves, tanks, mechanical couplings, anode connections and other difficult and irregular configurations. Their resistance to gasoline and oil make A51 and TC Mastic a good choice for service stations, terminals, bulk stations, producing fields and similar locations.

Substrate:  Steel, Stainless Steel, Ductile Iron, Other Metals, FBE, CTE, Concrete

Surface Preparation:  SSPC SP-2 Hand Tool Cleaning, SSPC SP-3 Power Tool Cleaning or SSPC SP-6/
NACE No. 3 Commercial Blast Cleaning

Optional Reinforcement: Royston Glas-Wrap can be applied over the mastic or between mastic layers, giving the coating added strength and impact resistance.

Safety:  Refer to Material Safety Data Sheet: MSDS-A51, MSDS-A51-LOW-VOC or MSDSTC-MASTIC

Application:  Apply in two coats that each have a WFT of 15 mils. Allow the first coat to dry to the touch before application of the second coat. Never apply more than 40 mils in a single coat to prevent mud cracking.

Property                               A51 Low VOC                Test Method

Color Black  
Percent Solids, Volume 53% ASTM D2697
Percent Solids, Weight 59% ASTM D2369
Solvents PCBTF, Toluene, MEK  
VOC Content <250 g/l (2.1 lb/gal)  
Flash Point 25°F ASTM D327 (Closed Cup)
Water Absorption <0.5% ASTM D570
Water Vapor Transmission Rate <0.5 g/ (h*m²) ASTM E96 Procedure B
Holiday Detection Setting 4800V for 15 mil DFT NACE RP0274
Cathodic Disbondment, 30 Days <10 mm radial <0.7 in² ASTM G8
Service Temperature Range -40°F to +150°F