Boatlife makes a product called LifeCaulk which is in a yellow tube. It's their brand name for polysulfide. Turns out they also make some stuff called Life 'Seal' which is also in a yellow tube but is made from polyurethane and silicone. Well, I guess the numbnuts at West Marine can't read.
Mar 11, 2020 · A long lasting, permanently flexible marine polysulfide sealant which can be sanded, painted, and used above and below the waterline. Tack-free in 1 to 3 days, excellent resistance to teak oils, gasoline, and diesel fuel. Ideal for teak decks, to bed deck and hull hardware, seal thru-hull fittings, and underwater seams.
The polysulfides, such as BoatLIFE'sLife Calk or 3M's 101, bond to wood better than silicone does and also bond fairly well to metals and fiberglass. However, they can melt some plastics and acrylics, such as Lexan, and some vinyls can become softened by exposure to their solvents.
If I use LIFE-CALK on my wooden boat is it advisable or necessary to fiberglass over it. When is it advisable to use Two Part Type P LIFE A No, fiberglass should never be used on a wood boat except as a last resort. If LIFE-CALK is properly applied all