Poron 4701 urethane foam gaskets offer excellent compression set resistance which enables durable, long-term performance for gasketing, sealing, and cushioning.Poron 4701 urethane sponge gaskets have low-outgassing and non-fogging, containing no plasticizers or residual chemicals to contaminate the device. Poron 4701 does not become brittle and crumble, and is non-corrosive to metal.Poron 4701 foams are Inherently flame retardant without the use of additives.Many Rogers Poron grades meet flammability requirements of UL HBF and MVSS 302.Engineered urethane formulations offering a wide modulus range - 2-90 psi @ 25% deflection.Poron 4701 provides good chemical resistanceEasy to fabricate, die-cuts cleanly and works with a broad range of adhesivesBroad range of formulas and thicknesses from 0.012" to 0.500" (0.43mm to 12.7mm)Rogers 4701 foams make excellent compression set resistent gaskets and dust seals.