I used this product to repair one of my engine torque bearings that was completely worn out. After reading several car forums that have already done this I figured it would be easy enough and a lot cheaper than buying a new bracket. After about 5 months of use it is holding up very well and remains very hard. It was easy to use with a caulking gun and was easier to pull off than some say. I just used soap and water right after use and any residue was removed immediately. For those using this to fix an engine mount, be aware that filling the entire mount will cause a lot of vibration in the car due to its harsh rigidity, but this levels off somewhat after a month or so. For those who want a smoother feel, just drill 3 holes in it equally spaced and that should do the trick. Be sure to let it dry for 3-4 days to get full hardness. All in all another great product from 3M. Best of all, it saved me about $80 on a new mount. FYI, the entire process took me about 30 minutes including prep and cleanup time, and considering I'm a bit meticulous about prep.
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