CrystalWax™ CSL-57 is a petroleum based wax which will protect vulcanized rubber products from the degradation (cracking) associated with exposure to atmospheric ozone. The blooming properties of CSL-57 cover a wide range of temperatures and provide continuous product exposure protection under general climatic conditions. As an anti-sunchecking wax, CSL-57 is used in natural, styrene-butadiene, butyl, neoprene and nitrite rubbers.