Long-lasting waterbased waterproofing for synthetic ropes. Helps to maintain rope handling characteristics and minimizes weight gain in wet conditions. Nikwax RopeProof can substantially reduce water absorption in climbing ropes (dynamic and static). We have been successful at maintaining strength, impact force, fall ratings, static elongation, sheath slippage and knotability within UIAA and the manufacturer's allowable limits. One 33.8 oz. bottle treats a 60 m rope.