I grabbed a tube of BLACK 5200 by mistake last year to use on some through transom bolts on a boat that was freshly re painted. No time to go back to the store for another tube, so I'll be reeeeeeeal careful....back to the store for acetone and a WHITE tube. If someone opens a tube accross the yard and I'm sitting down having lunch, I'll have it on me by the time I'm done eating.