Wayne
Veteran Member
"Waterproofing" Masonite
Hi, When I was about 7 yrs old, I saw designs for a surfboard sailboat in a magazine (?Popular Mechanics?). I decided to build it and started construction on it, but my older brother usurped the project and dropped the sailboat part. It used 4 1"x4" boards for longitudinal stringers, plus 1"x6" bow and stern pieces and some cross pieces, shaped so that the boat tapered from about 4" thick at the dagger board box to ~1 3/4" at each end. The frame was then covered with 1/8" Masonite. The Masonite was heavily varnished on both sides, letting the varnish soak in as much as the Masonite would hold. The Masonite was glued and nailed to the wooden structure, then given a final coat of varnish. The boat often sat in the lake for a few days at a time. The boat lasted for several years, then my brother gave it to a friend - I don't know how much longer it lasted after that.
If I were to make something like that again, I would use a UV resistant polyurethane as plain varnish is not well suited for direct sun and water immersion.
Hi, When I was about 7 yrs old, I saw designs for a surfboard sailboat in a magazine (?Popular Mechanics?). I decided to build it and started construction on it, but my older brother usurped the project and dropped the sailboat part. It used 4 1"x4" boards for longitudinal stringers, plus 1"x6" bow and stern pieces and some cross pieces, shaped so that the boat tapered from about 4" thick at the dagger board box to ~1 3/4" at each end. The frame was then covered with 1/8" Masonite. The Masonite was heavily varnished on both sides, letting the varnish soak in as much as the Masonite would hold. The Masonite was glued and nailed to the wooden structure, then given a final coat of varnish. The boat often sat in the lake for a few days at a time. The boat lasted for several years, then my brother gave it to a friend - I don't know how much longer it lasted after that.
If I were to make something like that again, I would use a UV resistant polyurethane as plain varnish is not well suited for direct sun and water immersion.