Apply an even and thin coat of glue just where you want it on all flat surfaces. To apply an even coat of glue to any flat surface, just squeeze the bottle while rolling the roller across the wood surface in overlapping strokes. The 8 oz. glue bottle contains a 2-1/2 inch wide rubber roller with a separate cap. Rollers can be easily cleaned with a damp cloth or by running under warm water. Roller applicator frame and bottle are made from nonporous polypropylene so glue can't stick. Perfect for white, yellow or liquid hide glues.