3M Marine Sealants for Campers
Having come from the boating world, is there a reason folks don't use the 4200/5200 marine sealants from 3M? They last years and are proven sealants. They can be tough to remove but isn't that the poi...
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I'm also involved in the boating world, and don't use anything else on my camper. No one on a boat would ever use the junk they turn out for RVs. The 3M sealants are expensive, and the RV industry is cheap which might explain some of it. They can also be very messy to use for the inexperienced.
I'm sure you know that 5200 is a very strong adhesive making later removal difficult if that is a consideration. 4200 is weaker but still much better than anything in the RV store. My favorite for most roof sealing is 4000UV - this is actually a polyether, not a polyurethane, and is more UV resistant (mainly it does not yellow in the sun), with about the same bonding strength as 4200.
I'm sure you know that 5200 is a very strong adhesive making later removal difficult if that is a consideration. 4200 is weaker but still much better than anything in the RV store. My favorite for most roof sealing is 4000UV - this is actually a polyether, not a polyurethane, and is more UV resistant (mainly it does not yellow in the sun), with about the same bonding strength as 4200.
