This work presents the studies conducted on the compatibility of deltamethrin when mixed with wood adhesive to manufacture plywood in order to protect the wood against wood-borers insects and termites. The following types of adhesive were tested: PVA, Urea-formaldehyde, phenol-formaldehyde and a formulation based on tannin. The experiments were made in the adhesive manufacturers' laboratories, where the conditions to which the adhesives are submitted during the manufacturing process were simulated. To verify the effectiveness of the adhesive mixed with deltamethrin the block tests were exposed to subterranean termites, Coptotermes havilandi. The tests showed that the internal layers of the plywood made with adhesives based on PVA and Urea-formaldehyde were protected for 40 months.