I had some 12 min epoxy from Hanger 9 .I tried to use it over a couple of months & it would not go off . Tried several mixs over a couple of months to glue some plywood with cup hooks on in the floor of fuse , left it for 2 days---- 7 days , soon as i pulled on the rubber bands it would come apart. SO phoned to Ha nger 9 sid i had been building for 100's of years , so not a novice . They were good enough to send me some relacement bottles .