Dennis. Your messages to the list come to me with a yellow warning. I don't understand why. You been posting good information for many years on the C&C list. The warning has appeared on you recent posts.
On Tue, Mar 22, 2022 at 3:51 PM Dennis C. via CnC-List < cnc-list@cnc-list.com> wrote: > Some thoughts on sealants. Sealants are primarily silicone, polysulfide, > polyurethane and blends of them. Add to that butyl rubber. > > First, as a rule, I like butyl for any hardware that has the potential to > flex or move. Chainplates fit that criteria. > > My default sealant for most everything else except plastic is LifeSeal. > For plastic I generally use silicone. > > Here's a reference for where to use sealants: > https://drive.google.com/file/d/12WmFxRiqzUw2xiqLaEtfBpS1pYocZID-/view?usp=sharing > > Note that Life Calk is a polysulfide. Do not use polysulfide for plastic. > LifeSeal is a blend of silicone and polyurethane. > 4200 is polyurethane. I don't use 4200. Got too many partially cured > tubes. Look at the expiration date before you buy. > > 5200 is NOT a sealant. It's an adhesive. From the 3M website: > > "3M™ Marine Adhesive Sealant 5200 is a one-component, high-strength, > moisture-curing, gap-filling polyurethane for permanent bonding of wood, > gelcoat and fiberglass." Note the word "permanent"! > > A bit off the subject, but Flexpaste seems to fix gouges in rubber rub > rails fairly well. Who'd a thunk it? An "as seen on TV product" that > actually works on a boat! > -- > Dennis C. > Touche' 35-1 #83 > Mandeville, LA > -- Sent from Gmail Mobile
