LifeCaulk is not recommended for plastics because it’s partly a polysulfide product, which will eat plastic. LifeSeal is my product of choice for this.
— Fred Fred Street -- Minneapolis S/V Oceanis (1979 C&C Landfall 38) -- on the hard in Bayfield, WI :^( > On Apr 5, 2017, at 11:59 AM, Steve Thomas via CnC-List > <cnc-list@cnc-list.com> wrote: > > 3M 4200 will work, but if the fitting is plastic, chances are you will be > replacing it again someday. 4200 is not as difficult as 5200, but neither is > easy to remove. Above the waterline through hulls are the only place that I > use silicone. Polysulfide (Life Caulk) would probably work, but there is a > caution about its use with plastics, and I don't know why. All of the plastic > tank vent through hulls, the shower through hull, and the electric bilge > through hulls needed replacement on my C&C36. Southern sunshine! > > Steve Thomas
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