07-14-2020, 07:06 PM
Been using the stuff for 40+ years, so here's what I know.
100% pure silicone sealant cures to touch within 8 hours, full cure is 24 hours.
Things that inhibit curing: oils, moisture, solvents, and other contaminants.
I would suspect the cork is contaminated or there was something on the metal.
Any chance your tube of sealant got contaminated or is really old?
btw, silicone sealant will not properly bond to cured silicone sealant!
100% pure silicone sealant cures to touch within 8 hours, full cure is 24 hours.
Things that inhibit curing: oils, moisture, solvents, and other contaminants.
I would suspect the cork is contaminated or there was something on the metal.
Any chance your tube of sealant got contaminated or is really old?
btw, silicone sealant will not properly bond to cured silicone sealant!