"I was using this in fairly low temperatures, so I can't vouch for how long it takes to go off in warm temperatures. At 15 degrees it was taking ten to fifteen minutes to firm up and about an hour to go rock hard. This stuff is just as good as more expensive resins. I find chemical mortar very useful. It's brilliant in upstairs bathrooms in to light blocks when you need a good load bearing fastening. I also use it when I need a waterproof glue! It's good for example glueing back large fragments of brick that might explode away while drilling through a wall. I have even used it as a waterproof grout for an entrance step!"
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Review 3 for No Nonsense Polyester Styrene-Free Resin 380ml