Need an adhesive that actually improves its grip in water? Endura-Bond is specially formulated to keep unwanted crystallization to an absolute minimum. Designed for use in the Medical Industry, Endura-bond is gentle on skin. Used sparingly, our hard bond should provide an uncompromising 30-day wear! Get 20 - 30 full perimeter applications per 1 oz. bottle and twice that for a 2 oz. bottle. Does not contain formaldehyde, lead or mercury.