Quote:
Originally Posted by Jim Day
I wonder if there is any difference between 4200 fast and 5200 fast.
Jim
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Tensile strength for the 3M 4200 is 300 PSI, the 5200 fast cure is 600 PSI, the 5200 slow cure is 700 PSI.
All those numbers are for adhesion under ideal conditions. On gelcoat the 5200 tensile strength is 519 PSI, and for adhesion to polyethylene that number drops down to 48 PSI.
The Marine Goop tensile strength starts around 3800 PSI under ideal conditions, and is at about 1700 PSI on some plastics. Much stronger that the 5200, but all of this is still ridiculous overkill for the sealant properties that we actualy use them for.