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Loctite 609 has a lower viscosity of 125 cPs compared to the 2000 cPs of 635. As a result, the 635 will work with a gap of .010" where 609 is recommended only to a gap of .005". 635 has a shear strength of 4500 psi where the shear strength of 609 is only 2300 psi. 635 has a cure rate of 1 hour to fixture vs. the 10 minutes needed for 609. Both meet the Mil Spec MIL-R-46082B Hope this helps, Kevin

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16y ago

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