Join Date: Jan 2003
Location: Maine Coast
Thanked 296 Times in 229 Posts
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If the frames...
If the frames are aluminum then 3M 101 is the best choice if they are plastic I would not advise the use anything containing polysulfide as it may not be compatible...
NOTHING on a boat is permanent so please, please, please DO NOT listen to the 5200 support group! 5200 is EVIL stuff and is nearly DOUBLE the strength, PSI peel strength wise, than the fiberglass your boat was laminated and built with!! 5200 is 100% NOT necessary!!!
Window's will eventually leak again no matter what you do! I personally do not like Life Seal due to the addition of Silicone. 3M 101 is a pure polysulfide with no silicone... You want to use a "light" adhesive and 3M 101 is 139 PSI vs. the 700 PSI of 5200..
There are plenty of threads on this subject....
P.S. I think you meant DAP Kwik Seal 3.0 as they don't make a Dynaflex 3.0 according to their web site. Neither of these products contains any polysulfide like Life Caulk does so I can;t grasp how you came away with the assumption they were similar. Life Caulk and Kwik Seal 3.0 or Dynaflex are about as similar as Rosie O'Donnel and Lance Armstrong!
Kwik Seal 3.0 also states, right in it's literature, "Not recommended for continuous underwater use". 3M 101 CAN be used for continuous underwater use as can most Marine rated sealants..
DAP also gives NO peel strength information, or strength ratings, and only calls it an "advanced polymer" but the MSDS makes no mention of polysulfide. Also absent is any exposure to UV information..
If it's Dynaflex you were talking about STAY AWAY! Latex is water based and if you seal a window frame what's inside may not dry for a long time, then, when it rains, it will leak!!
There are many things on a boat that you can save money on by buying non-marine but marine sealants are not one of them! Sure you could try and find some Thiokol, the inventor of polysulfide, but the last time I did it was the same price as 3M 101 and much harder to get...
Don't be penny wise and pound foolish. In terms of potential future repair costs, created by using an inferior product or the wrong product, the price difference between a marine sealant and DAP is .000000001% important...
-Maine Sail / CS-36T
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Last edited by Maine Sail; 11-10-2008 at 11:02 PM.