Chesterton 185 Expanded Form-In-Place Spooled Joint Sealant is 100% virgin PTFE with micro-fibrillated internal structure for excellent stability. 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. 185 is soft and pliable to conform to worn or uneven surfaces. It is fastand easy to use. Lay out complex shapes fast with 185 Expanded PTFE Spooled Joint Sealant, eliminating waste from cut sheet. Self-adhesive strip holds the joint sealant in place for easy assembly in the shop or in the field.