cavelamb himself wrote in
m:



It's the same principle, as both are polyester resin products.

Yes, but gell coat has wax mixed in - same as finishing resin.
The Wax floats to the surface during cure and blocks off contact
with air.

PVA (or anything else) is not required.


Richard

Polyester Gel coat comes in waxed and non waxed, non waxed is usually
used for in in-mold layup where the gel coat can cure hard without the
presence of air. You can add wax to non waxed for non mold or in air
curing or use non waxed and seal from air to give a hard cure by
covering with something like PVA. PVA works, as would almost any other
air barrier..

Jerry wrote:
cavelamb himself wrote in
m:



It's the same principle, as both are polyester resin products.

Yes, but gell coat has wax mixed in - same as finishing resin.
The Wax floats to the surface during cure and blocks off contact
with air.

PVA (or anything else) is not required.


Richard


Polyester Gel coat comes in waxed and non waxed, non waxed is usually
used for in in-mold layup where the gel coat can cure hard without the
presence of air. You can add wax to non waxed for non mold or in air
curing or use non waxed and seal from air to give a hard cure by
covering with something like PVA. PVA works, as would almost any other
air barrier..


Ya got me there, Jerry.
In that case PVA should work fine...


Richard
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