Sanhui Company is an authorized agent and distributor designated by Sumitomo Electric of Japan, holding official agency certification. We specialize in representing products such as Sumitomo heat shrink tubing, Taiwan Huayou heat shrink tubing, Sumitomo electronic wires, and Sumitomo connectors. For other models not listed, please feel free to inquire by phone! SA2 Flame-Retardant Heat Shrink Tubing with High Waterproofing and High Flame Resistance, Featuring Highly Shrinkable Adhesive Basic Characteristics Material: Outer Layer — XLPE Inner Layer — Thermoplastic Adhesive Shrink Temperature: 115°C or higher Shrink Ratio: Inner Diameter Shrinkage ≥75% Length Change Rate: ≥ -10% Continuous Operating Temperature: -40°C to 130°C Features: Excellent adhesion to metals, rubber, and plastics Highly shrinkable, making it highly effective for waterproofing coatings on objects with significant step differences The adhesive fills gaps during high shrinkage, providing waterproof protection for bundled wires Superior abrasion resistance Flame retardant Applicable Standards: Standard specifications as defined by Sumitomo Electric Super Engineering Plastics Co., Ltd. (R4-B100) Applications: Waterproofing, insulation, and mechanical protection for automotive and electrical wiring harnesses Waterproof insulation protection for the ends of automotive and electrical wiring harnesses Waterproof insulation and mechanical protection for critical wire connection points Waterproof treatment for automotive parts and electronic components with significant step differences Colors: Custom colors available, including black, yellow, green, blue, gray, pink-white, and red. Black is available in stock. Models: Multiple models available. Sumitomo Heat Shrink Tubing Series: UL Standard Eco-Friendly Heat Shrink Tubing: SUMITUBE F(Z), F2(Z), F3(Z), F4(Z) Double-Layer Waterproof Heat Shrink Tubing: SUMITUBE W, W3C, W3B2, W3F2, O2B2, O2C, SA2, W3B2(4X) High-Temperature Heat Shrink Tubing: SUMITUBE K, K2, K3, KH200 High-Ratio Shrink Heat Shrink Tubing: SUMITUBE B2(3X), B2(4X), W3B2(4X) Halogen-Free Heat Shrink Tubing: SUMIPAC SUMITUBE NHR2, NHR4 Transparent Flame-Retardant UL & Eco-Friendly ROHS Heat Shrink Tubing: SUMITUBE V (PVC Material), C Non-Shrink Sleeving: IRRAXTUBE V2, F2, A, B, B8, ER2, FE2, NHR, RP3, RP4, RP6, etc. Taiwan Huayou Heat Shrink Tubing: SUMIPAC SUMITUBE F32, F34, NHR2, NHR4, A, C Sumitomo Electric Tapes: IRRAX TAPE VZL Electronic Wires (SUMITOMO): LF Eco-Friendly Irradiated Wires: UL1571-AWG (24-36), UL3266-AWG (22-28), UL3265-AWG (22-28), UL3443-AWG (26-28) Shielded Wires: UL1571-AWG32 V2SV, UL2851-AWG32 V2SV HF Eco-Friendly Halogen-Free Wires: UL10368-AWG (24-30), 10368P-AWG26, UL3302-AWG (24-32), UL3385-AWG (22-28), UL3767-AWG (28-32) Flexible High-Voltage Wires for LCDs: UL3239, UL3633, UL3688, UL3613 Teflon Wires: UL1867-AWG (32-36), UL10064-AWG (32-40) Silicone Wires: UL3633-AWG28, UL3688-AWG28 Tinned Wires: UL1571-AWG32OM-1 Ultra-Fine Coaxial Cables: UL10005 AWG40-AWG44