Waste Away Paint Hardener, 12 pack

Does a good job of hardening paint. If the paint has clear-ish liquid floating on top, stir it up first. The clear liquid will not harden. Specs say it will treat "up to" two-thirds of a gallon of paint. I found that after treating that volume the paint was still a bit soft. Plan to treat just a little less than two-thirds with one packet. The paint sticks are handy if you don't have extras, you'll need to toss your paint stir stick when you're done.

This product I would highly recommend. Only to seconds to harden...

Works well with my elliptical trainer. A 15 year old version of the same fell apart (after many many sweaty hours).

Good and simple to use product

It works as directed.