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™ 357P Black Stem Pak

Non-Curing VOC Valve Packing/Sealant


Check Seal™ 357P Black Stem Pak is a non-curing pumpable packing that contains a blend of non-asbestos fibers in synthetic oils. It works great on valve packing and wire wrap fugitive emission repairs, and is specifically designed for high temperature hydrocarbon service up to 750°F. It is pumpable with a high pressure (10,000 psi) lubrication hand gun.

Typical Characteristics


Glycols, hydrocarbons, water, steam, bfw and manysolvents. Good general purpose, high temperature valve packing.

Note: For chemicals, refer to compatibility chart  
Temperature Range -40°F to 750°F (-40°C to 399°C)
Appearance Black, fibrous
Injection Characteristics 900 psi - Flows well at higher pressures
Cure Non-curing
Long Term Changes

None; permanent packing, may be added to

Storage Keep in dry area


Packaging Information

Item Number Unit Size   Quantity
 CS082316JBX 300J-12 “J” stick 1-3/8” x 8-1/2”  16 per box
 CS0823001PL 5/8” x 4” plugs  10 per pouch
Do Not Use On Oxygen Services.

Special packaging sizing available upon request.


More Non-Curing