Wood-Resin Compatibility and Mechanical Performance in *Pinus pinaster*

ACREMA studied the impact of resin tapping on Pinus pinaster wood strength using mechanical testing on 238 structural-sized logs. Visual grading and UNE-EN 338 compliance confirmed similar rejection rates between resin-tapped and control groups. Static bending tests showed no significant difference in modulus of elasticity, bending strength, or density, with only a 6% higher average strength in the control group. Results confirm resin tapping does not compromise structural wood quality, supporting its integration as a sustainable ecosystem service in Galician mountain forests.