Been doing some research and I came to the conclusion like I thought, you don't need fiber tape or mesh. Fiber glass mesh won't help keep a corner together as the wood would come apart before the resin would!
When I build my plywood I will just use Fillets in the corners then epoxy
The fiberglass will help keep the water out though. And if you apply the fiberglass to the corners on the outside, it will help keep the corners from pulling apart..
If everything goes as planned, the MAX ACR epoxy is probably the best bang for your buck..At ~$90/Gal it's one of the cheapest aquarium specific epoxies out there, and aside from Ames Blue Max liquid rubber, its the cheapest waterproofing I have found out there.
Ames blue max is very thin stuff, I watched a demo at a local hardware store and it took over 7 coats before the wood wasnt visible..you probably get about the same amount of coverage out of 2 gallons of the MAX ACR as you would a 5 gal of the blue max..
But this is just my observation, I havent personally used it myself, just saw the demo at the hardware store.
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