3M ThermaVolt AR Electrical Insulation Paper provides excellent thermal stability and high dielectric strength. It is ideal for open ventilated, dry type transformer applications. The paper provides low moisture absorption and exhibits low moisture content, even under high humidity conditions.This insulating paper has good mechanical strength that resists damage during handling and maintains excellent conformability. It is suitable for core wrap, phase insulation, high low barrier, major and minor ground insulation, interwinding and turn insulation applications. It is approved for use as major ground insulation in Class 220(R) electrical insulation systems. 3M UL Recognized Insulation Systems may be found in UL File No. 65007. REACH Compliant and RoHS 2011/65/EU Compliant .