Black Rubber Resin Silicone Leaking Sealing with High Voltage Self-Fusing Tape. Class H Insulation: Rated as Class H Insulator with dielectric strength up to 25kV/mm for high voltage safety. Customizable Colors: Available in standard colors (Red, Yellow, Green, Black) with custom color options. Waterproof & Airtight Seal: Creates self-integrated, airtight, and waterproof seals on hoses, cables, and connections. Chemical Resistance: Resistant to fuel, water, oil, acids, solvents, and UV exposure for harsh environments. Long Service Life: Rated service life reaches 30 to 50 years, significantly longer than industry peers. Flame Retardant: Meets UL94 V0 flame rating for enhanced fire safety in electrical applications. Customizable Sizes: Available in various widths and thicknesses with customized packaging options. Free Sample Support: Free samples provided for existing stock to assist customer evaluation.