Subject: Trailer or camper
Date: Thu, 08 Aug 2002
Can your products be used on plywood sheathed truck cap or tear drop
trailer instead of expensive aluminum outer skin?
Yes, absolutely, and with an expectation of a longer wood life than you
would get with the metal skin. Plastic or metal skins over plywood
actually promote wood rot and deterioration. The reason is that the
skins condense moisture inside, wet the wood, and then prevent it from
evaporating away into the atmosphere. When the sun hits the skin the
inside temperature rises and it becomes in effect an incubator for the
rot fungi. This is why plywood and structural rot is so prevalent in
campers and motor homes.
The proper procedure is to cut and trim all your plywood (use untreated
plywood, standard exterior grade) to fit, and then before installation
coat it on all sides with CPES (Clear Penetrating Epoxy Sealer). Pay
particular attention to the cut edges. Any holes drilled into the
plywood for screws/bolts should also be CPES-treated before the fastener
Final coatings on the ply can be anything from a standard paint to
something totally waterproof and UV resistant, such as our Elasta-Tuff™ 6000-AL-HS Polyurethane Coating. The
Elasta-Tuff™ 6000-AL-HS is totally waterproof,
bonds VERY well to the treated ply surface, and has a life expectancy of
Come on back if you have additional questions.