Wings Forum Forum for homebuilt experimental & light sport aircraft pilots, owners, & builders.   inside surface sealing of fiberglass cowlings? Click here to go to the original topic          Wings Forum Forum Index -> Just Aircraft View previous topic :: View next topic   Author Message Dave Krall CFII SEL SES Joined: 14 Mar 2007 Posts: 338 Location: Seattle WA Posted: Mon Aug 11, 2008 9:11 pm    Post subject: inside surface sealing of fiberglass cowlings?   Should the work and weight penalty be accepted and the inside surfaces be sealed with primer &/or paint or some other substance to help protect against microscopic water &/or humidity invasion that will freeze at altitude or on cold nights thereby gradually weakening the fiberglass mesh with micro-fractures? Back to top   stede52 Joined: 06 Sep 2007 Posts: 243 Location: Carnation, WA Posted: Tue Aug 12, 2008 12:47 am    Post subject:   Dave, there really isn't any need to coat the fiberglass to make it moisture proof even though you may have a little surface freezing unless it's for looks.  The polyester resin which the cowling is made of won't be affected, unless it is frozen all the way thru and if you're flying in that kind of weather for that length of time you'll have bigger problems then frozen fiberglass.  :) Steve Back to top            Wings Forum Forum Index -> Just Aircraft Page 1 of 1 Powered by phpBB Search Engine Indexer Powered by phpBB 2.0.22 © 2001, 2002 phpBB Group