I am tempting fate. Got my riser cut up, phenolic in , glued up and in the hot box. only 35 degrees in garage. I put a couple tarps over box and taped securly around. these are the silver tarps, silver in towards box. going to let it set 5 1/2 hours. We will see. Worst case, I have to get a new riser block. Just wanted to see if I could glue up at the lower temps.