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The premise is that if one reduces sealant fatigue by lowering modulus while leaving other characteristics of a sealant unchanged, its durability will improve. Reducing sealant fatigue is seen as a positive consequence of lowering the modulus of elasticity of a sealant. The data shows the effect of incorporating a modulus modifier in one- and two-part (standard curing) urethane sealants and a one-part silane curing polyether sealant. This approach lowers modulus with no or minimum reformulation.
sealant, additive, adhesion, modulus, elongation, movement, durability
President of Klosowski Scientific Inc.Senior Scientist, Chief Chemist—Engineering Diagnostics Inc., FASTMDow Corning Corporation, Klosowski Scientific Inc., Bay City, Michigan
PresidentRegistered Professional Engineer, The Performance Strategy Group, www.performancestrategygroup.comCertified New Product Development Professional, John E. Plott, PE LLC, Midland, MI