Best glue is with VOC because doesn't content water because as you know water isn't good for wood, but VOC glue is forbidden for competition so you must buy blade factory pre-lacqued or do it yourself.
The difference is WBG is allowed and VOC is forbidden for competition.
Also is important the sponge hardness of rubber, for Chinese hard sponge rubbers I use latex glue with high viscosity with minimum 1 layers at blade & two on the sponge.