Chemola™ Desco

Chemola™ Desco is one of the largest and oldest producers of valve lubricants, sealants and packing. The line also offers a variety of greases for a wide range of industrial applications.

Chemola™ Desco TFE-Seal 108

For Hard to Seal Valves

Chemola™ Desco TFE-Seal 108
is the ultimate sealant for damaged valves. It was developed and tested by a group of valve repair specialists with over 20 years combined experience. This is the ultimate sealant of internally worn or damaged valves. It contains a 100% synthetic base fluid for excellent resistance to washout from hydrocarbons. If TFE-Seal 108 won’t seal your valve, it will need to be taken offline or rebuilt.

Recommended Uses
Chemola™ Desco TFE-Seal may be used on worn or pitted valves. It can also be used as a sealant for stuffing boxes or as an injectable packing.

Designed for use by qualified technicians only 

Can cause ball check valve fittings to fail

Typical Characteristics

Appearance Dark gray, grainy, tacky
NLGI 2-3
Penetration (ASTM D217) 245-275
Worked Penetration, 60x (ASTM D217) 245-275
Base Oil Natural and synthetic ester
Base Oil Viscosity 1,000 cSt at 40°C
Base Oil Pour Point -10°F (-12°C)
Thickener Inorganic
Additives H2S/corrosion inhibitor package
Solids Content PTFE
Specific Gravity 1.1
Density (lb/gal) 9.5
Dropping Point (ASTM D566) >500°F (260°C)
Flash Point >500°F (260°C)
Temperature Range -20°F to 350°F (-29°C to 177°C)

Resistance to Water (FTM 5415)


Resistance to 50% Ethanol in Water (FTM 5415)

Resistance to Synthetic Condensate (FTM 5415 mod) Pass
Resistance to Mineral Spirits (FTM 5415 mod) Pass
Resistance to 20% Hexane in Mineral Spirits (FTM 5415 mod) Pass
Resistance to Diesel Fuel (FTM 5415 mod) Pass



Packaging Information

Item Number Unit Size  Quantity
089816JBX "J" stick 1-3/8"x 8-1/2" 16 per box
089812KBX "K" stick 1-1/2"x 10-1/2" 12 per box
0898010QB 10 lb can  
0898020WMS 20 lb pail  
0898040WMS 40 lb pail  
0898120KG 120 lb keg  


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Do Not Use On Oxygen Services.

Special packaging sizing available upon request.

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