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
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.
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
|Percent Solids, Volume
|Percent Solids, Weight
||PCBTF, Toluene, MEK
||<250 g/l (2.1 lb/gal)
||ASTM D327 (Closed Cup)
|Water Vapor Transmission Rate
||<0.5 g/ (h*m²)
||ASTM E96 Procedure B
|Holiday Detection Setting
||4800V for 15 mil DFT
|Cathodic Disbondment, 30 Days
||<10 mm radial <0.7 in²
|Service Temperature Range
||-40°F to +150°F