The fiberglass cloth used in fiberglassing a typical plywood boat must be compatible with epoxy resin.
Epoxy plywood mat in between.
Wet out clarity of mat with epoxy varies somewhat with different suppliers but none of them wet out as clear as a good 4 oz or 6 oz fiberglass cloth.
Fiberglass mat should not be substituted for cloth.
We have more than four decades of experience in composite construction in marine aviation industrial applications.
Dip the brush in the epoxy and lay the epoxy on the surface with light even strokes.
Not a way to promote the use of inferior materials in the hope of selling some epoxy.
After several minutes lay on additional epoxy to dry white areas.
Don t force the epoxy into the cloth which may trap air in the fabric and show through the clear finish.
The mat that is stitched to the fabric does not have a styrene binder like the regular chopped strand mat.
The most common is stitch and glue construction where panels are cut to a designed shape and temporarily joined with wire or plastic ties.
Make the transom a couple of inches over size all the way around.
The fabric does not wet out perfectly clear with epoxy.
And two or three layers of fiberglass cloth or mat between the two sheets of plywood before you cut to shape.
Apply enough epoxy to saturate the fabric and the wood below.
The 1708 is a 17 ounce 45 bias fabric with a 3 4 ounce chopped strand mat stitched to it.
If in doubt test the material using scrap wood to insure that it cannot be pulled off.
No amount of epoxy can change an exterior grade panel into one of marine grade.
For gently curving or flat projects like cabin soles or plywood decks mat and epoxy should work fine.
Knitted fabric is compatible with polyester vinyl ester and epoxy fiberglass resin.
Construction methods with plywood plywood is ideal for several construction methods.
You may want to entertain the idea of epoxy i use raka 900 medium.
It s thinner it s not as viscos.
Features an inventory of polyester resin epoxy gel coat mat and cloth foam and the various tools to aid in any lamination project.
It is compatible with epoxy even though it has mat with it.
Lt should be emphasized that the glen l epoxy encapsulation system is designed to make an already good material wood and plywood a better composite engineering material.
Epoxy coating would be used on something that is plywood based construction that may be veneered inside and out so it has the appearance of traditional joinery but is very much a monocoque structure.
Again this is epoxy that is sold as a clear coating epoxy.
Then you apply epoxy fillets and fiberglass tape to permanently join the structure in a rigid shape.