Aquathene FR420000 is a colorable flame retardant catalyst masterbatch selected by customers for use in moisture cure applications. FR420000 also contains antioxidants, metal deactivator and stabilizers for sunlight resistance. When FR420000 is melt blended with Aquathene AQ120000 in a 52% / 48% ratio, respectively, and crosslinked after exposure to moisture, this formulation is typically used in low voltage power and control cable applications where UL44 and CSA 22.2 (No. 38 and No. 52) specify VW-1 and FT-4 flame rating with 90°C service in wet locations.