DiamondClear™ LV is a low-viscosity glass repair resin as well as an acrylic acid free resin with the perfect index match for glass. This DiamondClear™ LV resin is designed for star breaks. It can also be used in the winter for all breaks when colder temperatures can slow repair times. LV Resin is formulated with the correct balance of UV inhibitors to prevent any yellowing. Use in temperatures below 60 degrees F. A warming source for the windshield is still recommended in temperatures below 60 degrees F. British Standard Institute (BSI) Tested.