Urethane Filled Mounts
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This is the stuff you want to use. Shore A 80 urethane (part # 8644K11) purchased from www.mcmaster.com
In one of the mounts, inside the rubber is a black liquid. I cut out that pocket and drained the liquid.
Tape up one side of the mounts real good. I would recommend after mixing the urethane mixture to let it sit for at least 15-20 min, so its not too liquidy and doesn't leak out easily when you pour it.
This stuff cures to 80-90% in 3 days and takes about a week to cure fully. After that, you're good to GO!
