3M™ Heat Shrink Tubing Eps-300 Is A Dual Wall Tubing Provides The Advantage Of An Integral, Adhesive Lined Construction. This Flame Retardant Tubing With A 3:1 Shrink Ratio Offers Insulation For 600V Rated Applications. The Flexible Polyolefin Construction Features An Internal Layer Of Thermoplastic Adhesive, Which Offers Moisture Seal Protection In Automotive and Marine Applications.