100% Silicone-based sealant protects against moisture and corrosion UL?Listed to 486D for use in damp/wet locations or direct burial/below-grade applications Easy to apply, pre-filled twist-on wire connectors Expanding, live-action square-wire spring for fast, secure and long-lasting connections Deep skirt provides superior moisture resistance to protect connections Tough, UL 94V-2 flame-retardant shell rated at 105°C (221°F) Model 64 approved for bonding and grounding applications