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CheckSeal™ 20 AB

Dielectric Two- Component Sealant

Check Seal™ 20 AB is a two-component, rubber type sealant developed for the electrical utility industry and commonly used for transformer leaks. It is available in both fast and slow cure formulas delivered in a two part, pre-measured kit for easy application. Both parts are mixed then applied with a high-pressure lubricator. Check Seal™ 20 can be used for sealing flange gaskets, valve stems, drain plugs and couplings. It can also be used in conjunction with clamps.

Recommended Uses

Sealing and encapsulating heating elements in appliances, aerospace gasketing, industrial ovens and other bonding/sealing where parts must perform at temperatures below 250°F.

Typical Characteristics

ApplicationsTransformer oils, fuels, hot oils, refrigerants, alcohols, chemicals and solvents CAUTION: Some of the additives in the steam and bfw can kill the cure.
Temperature Range 20°F to 275°F (-6.66°C to 135°C)
Limitations Should not be used at temps over 275°F (135°C)
AppearanceOff-white resin paste with dark catalyst
Injection Characteristics 500 psi, flows well with high pressure applicator but can be poured directly into place
CureSemi-hard rubber that is removable; fast and slow cure rates available (temperature dependent)
Long Term ChangesNone
Storage 70°F or lower

Packaging Information

Item NumberUnit SizeQuantity
CS20081112 oz. kit16 per box
CS2064111/2” gal kit, 6 lb