Check Seal™

Check Seal™ provides an array of products for online leak protection. This line offers both curing and non-curing sealants and packing.

Check Seal™ 3B

Semi-Curing Rubber Sealant

Check Seal™ 3B cures to an extremely tough, semi-pliable rubber at high temperatures. It is designed for use with temperatures up to +700˚F, and is effective as a primary and secondary sealant. It has been successfully used as a secondary micro-void sealant after initial sealant failed.

Typical Characteristics

Applications Acids, steam, some solvents, fuels, glycols, mild alkalis, aliphatic hydrocarbons, hot oils, kerosene, steam, water, liquors. It also has been used successfully as a secondary micro-void filler after injecting a different sealant on the real problem leaks.
Note: For chemicals, refer to compatibility chart  
Temperature Range  40°F to 700°F (4°C to 371°C)
Limitations Should not be used at temps over 700°F (371°C)
Appearance Yellow paste
Specific Gravity 0.9
Volume 191 cu. in – 1 gal pail
Volume 14 cu. in – J stick
Volume 1.1 cu. in – 3.5” plug
Injection Characteristics 500 psi, flows well with minimum hydraulic pressure
Cure Cures at 350°F to 400°F, non-curing at lower temps
Long Term Changes None
Storage Keep at room temperature


Packaging Information

Item Number Unit Size   Quantity
 CS300211  1 gal pail, 5 lb  
 CS300511  “J” stick 1-3/8” x 8-1/2"  16 per box
 CS08265001PL  5/8” x 4 plugs  10 per pouch


Do Not Use On Oxygen Services.

Special packaging sizing available upon request.

More in this category: Check Seal™ 6B »

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