Fiberglass Supply DepotPremium Polyester Resin w/Hardener for Laminating mat, biaxle, Cloth (Quart)

Didn't know it took longer to harden

The resin came with a meshing cup for the hardner it was a very nice touch, when I finished I put every Bach in the ziplock bag it came in.

My first test batch of one ounce with 10 drops of hardener. failed to harden. All other batches were mixed with 15 to 18 drops per ounce. With that mix ratio this product performed flawlessly! the fact that I had to alter the mix is the only reason for 4 stars.

Came quickly. My use case was odd, I was stabilizing a shepherds crook pole in a bed of gravel. For thispurpose, it worked very well. It does produce annoying fumes but that is a characteristic of all such resins.Good stuff!

Like some other reviewers, I found that this didn't set properly. After 72 hours, it's still tacky and soft enough to be scraped up with a fingernail. I'll need to remove the faulty resin manually and use some VOC to clean it up.I've used tons of polyester fiberglass resin for restoration and repairs and I'm deeply familiar with how to measure and apply it. Due to some manufacturing or storage issue, this was defective. In any case, Amazon - as always - stood by this product and provided me with a credit which I used to buy a different brand of resin.