if you buy the rubber seal new,it already has a sealant on the outer part. personally I use a non setting mastic like this Magnum Motorhomes - Viewing Product: the windows I put in mine and my daughter's vans had the original rubbers and they never leaked
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.