JZP-5.2 Outdoor-Rated Precision Molded Rubber Vibration Isolator Mount — Zero-Void Construction for Exposed Installations What Happens When You Install an Indoor-Rated Rubber Mount Outside? The failure chain is predictable and well-documented. Within 3-6 months of continuous outdoor exposure, the surface of a standard natural rubber Rubber Vibration Isolator develops a network of micro-cracks — technically termed ozone crazing — as atmospheric ozone attacks the unsaturated