Phenolic sidewalls are naturally waterproof and, unlike UHMW and ABS, bond great. No additional treatment (i.e. flame treatment) is needed to bond. Works well with thick wood glues and all epoxies. These sidewall strips are .5" thick and .375" wide. Reinforced phenolic has a high modulus, adding to the torsional stiffness of your ski or board. Available by the piece.