Chesterton 185 Form-in-Place Spooled Joint Sealant

Chesterton 185 Form-in-Place PTFE Joint Sealant
Reliable Sealing with Minimal Re-Torque Requirements


​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​Chesterton 185 Expanded, Form-In-Place Spooled Joint Sealant is 100% virgin PTFE with micro-fibrillated internal structure for excellent stability. A micro-fibrillated structure turns ordinary PTFE into a dimensionally strong, creep-resistant gasket material. 

185 provides a long-lasting, high-reliability seal with minimum re-torque requirements. It is soft and pliable, to conform to worn or uneven surfaces, and easy to use. 

Lay out complex shapes fast with 185 and eliminate waste from cut sheet.  Self-adhesive strip holds the joint sealant in place for easy assembly in the shop or in the field. 

185 PTFE Joint Sealant Kit Reorder No. 004801. Kit includes four spool sizes: 3/16", 1/4", 3/8" and 1/2".​

Chesterton 185
​Superior sealability, even on worn or uneven flange surfaces
Minimum re-torque requirements
Suitable for food-grade applications FDA 21 CFR 77.1550

​Non-standard or complex flange shapes
Steam vessel flanges
Water systems
Pump or compressor housing flanges
Most flanges and joints, even with worn or uneven surfaces

​Temperature Limit: 270° C (450° F) to 315° C (600° F)​
Pressure Limit:​Full vacuum to 210 bar g (3000 psig)
Chemical Resistance:​pH 0-14 except molten alkalii metals and elemental fluorine​​



SDS: 184 (English) 184 (English)pdf
Installation Instructions: 185 (English) Instructions: 185 (English)pdf
SDS: 184 (Francais) 184 (Francais)pdf
SDS: 184 (Deutsch) 184 (Deutsch)pdf
SDS: 184 (Svenska) 184 (Svenska)pdf