Someone asked awhile back about a good white outdoor sealant. I have no experience with this yet, but 3M makes a new sealant, Fast Cure 4000 UV, which is supposedly great for outdoor use, UV resistant, pure white, etc. It doesn't say what it is, but I would imagine it's not a silicone, but not sure. Worth looking into. Keith __ Health is merely the slowest possible rate at which one can die.