AlltraTM 440 is a true re-structured PTFE gasket sheet with excellent physical properties to be used in the most demanding applications. Its unique construction, which includes premium PTFE resin and glass microspheres, limits the cold flow problems associated with skived PTFE sheets. AlltraTM 440 is highly compressible making it effective in applications where bolt load is limited by equipment design.
Alltra 440 is suitable for a variety of services including aggressive fluids such as acids and caustics, hydrocarbon derivatives, solvents, water, steam, hydrogen-peroxide, refrigerants, and more. The high compressibility of this style makes it particularly suitable for use with stress-sensitive joints.