True Composites:MEK-P Polyester Resin Hardener – Methyl Ethyl Ketone Resin Catalyst – Advanced Activator Bottle for Polyester Resin, Gelcoat, Epoxy Ester Products – 2 x 4oz Bottles

I bought this hardener because of the price, the price of this and the price of other small tubes of hardener is quite substantial , I read where some had complaints for this or that , but for the price it was worth trying . I used this with the fiberglass resin I bought from a chain auto parts store and it worked fine whether it cured faster slower I can't say it was somewhat cool when I used it and it seemed to cure at the same rate as any other hardener I have used, I am very pleased with the product it worked fine and much cheaper than the 1.5 oz one person complained there was not a nozzle spout easy to find a plastic bottle with a drip spout , I just poured my guesstimate into the cap and used it that way.

First kept on the bottom shaded space of my desk. One of the bottles destroyed my wooden shelf!!! Transferred to a different place, still the bottle was exerting the toxic particles into the air, as eyes felt irritable. I transferred the leftover of one bottle to a glass jar, which I hope that will help the issue. Still didn't have a chance to use it. Also, even after just holding the plastic bottle, the fingers will have a residue of the substance left on the skin, which is HIGHLY DANGEROUSE, and will severely irritate your eyelids for days!!! VERY DANGEROUS PRODUCT!!!

Not sure if this is a little stronger than what I had but it works very well without adding as much , I used about 2 cc per pint

My tube of hardener for a quart of Polyester resin broke, I could not find the same chemical hardener so I tried this. It did nothing to start the catalyzation.

Does just what it's supposed to do and in this cold weather I need more of it

Product does not work as listed; there is a viscosity difference & a difference in tint. Product has not catalyzed after 2 attempts using specifications, attempted a hot batch assuming I didnt have enough thermal mass but this was not the case. Overall would not purchase again.

this item does what it's intended to do. catalyst for resin

Great product, great price.