Phenol-formaldehyde (PF) resin is one of the most well-known adhesives for exterior use. PF adhesive commercial thermoset polymers that used extensively due to its many benefits. This study investigated influence different types and levels catalysts, i.e., NaOH CaCO3 at 1% 5% based on solids content properties, adhesion, cohesion strength resin. The results show catalyst type significantly infl...