A new method involving a cyclic vacuum-pressure soak-dry (VPSD) procedure was compared with the traditional two-cycle soak-dry delamination method. Boards of southern pine were treated with (a) PCP and (b) Cu-Cr-As and glued with phenol resorcinol to represent (a) a compatible preservative/adhesive system and (b) an incompatible system. Deep wood failure of the two systems differed only slightly before exposure to the new method but the difference increased after one cycle and continued to increase with increasing cycles. Shear strength measured with the new method was less sensitive to differences in adhesive/preservative compatibility, whereas delamination measured with the old method was much less sensitive. -- AATA