Shear strength of urea-formaldehyde, phenol-formaldehyde and polyvinyl acetate glue bonds in fungi and insect-preserved pine plywood. Article describes influence of Lignofix E - Profi preservation on shear strength of plywood, in case of treatment of raw veneers or ready made composite. It was determined that preservation of veneers before pressing causes significant loss of final product strength. Impregnation of ready made plywood does not change its strength, so Lignofix E - Profi treatment should be performed after gluing/pressing of plywood.