Re: [bolger] Re: Materials: Plywood and Epoxy
Just my two penny'orth... Marine Plywood does not need sheathing to prevent
delamination. A good sealer and paint job will do the trick providing that seams
and all plywood edges are taped. This is not intended to provoke a massive
debate but merely pointing out that not everybody wants to double the money
spent on building a boat by sheathing it.
Regards
Daniel
delamination. A good sealer and paint job will do the trick providing that seams
and all plywood edges are taped. This is not intended to provoke a massive
debate but merely pointing out that not everybody wants to double the money
spent on building a boat by sheathing it.
Regards
Daniel
Just to cheerfully add a couple thoughts on what's worth
shopping for
when you choose epoxy:
1. Ratio. 4 : 1 might be trickier to mix in small
amounts that 2 : 1.
2. Ambient temperature. Some like 70 or higher. Others
work as low as 35-40, and can handle high humidity. Those
that mixnmatch the hardeners let you adjust the temp and
curing time to suit.
3. Amine Blush. Some have this, others not. It come off,
but is an extra operation, and has to go somewhere.
4 Clarity. Tends to go inverse proportion to the blush in
products. Darker
and more yellow might not be so nice for varnish finish than
the water clear.
I like one that gives the best of all of this.
I've used the double syringes from the dime store and love
the dry sticks of plumber's epoxy putty for a quick repairs,
but since epoxy formulations vary in service for temp
resistance and ( I think ) water permeability, for a real
project marine epoxy's right.
Mark
shopping for
when you choose epoxy:
1. Ratio. 4 : 1 might be trickier to mix in small
amounts that 2 : 1.
2. Ambient temperature. Some like 70 or higher. Others
work as low as 35-40, and can handle high humidity. Those
that mixnmatch the hardeners let you adjust the temp and
curing time to suit.
3. Amine Blush. Some have this, others not. It come off,
but is an extra operation, and has to go somewhere.
4 Clarity. Tends to go inverse proportion to the blush in
products. Darker
and more yellow might not be so nice for varnish finish than
the water clear.
I like one that gives the best of all of this.
I've used the double syringes from the dime store and love
the dry sticks of plumber's epoxy putty for a quick repairs,
but since epoxy formulations vary in service for temp
resistance and ( I think ) water permeability, for a real
project marine epoxy's right.
Mark