What kind of glue is today's plywood?
if you want to make outdoor use of wood products, you can use E1 grade (or even E0 level) phenolic glue.
if you want the wood products have a stronger waterproof and moisture-proof performance, you can use E1 (or even E0) melamine glue.
if you want to make general indoor wood products, you can use E1 (or even E0) urea formaldehyde;
High-quality urea-formaldehyde glue / melamine glue / phenolic glue can reach E0 level, E1 level, that can be used directly for indoor.
