The Critical Bond: Why S1125 Adhesive is the “Secret Sauce” of Sealed Harnesses
If you ask a professional wire harness builder the difference between a good loom and a legendary one, they will point to the sealant. Heat shrink is a protective sleeve, but adhesion makes it a seal. Our factory recommends Raychem S1125 as the definitive solution for environmental protection [11].
The Third Member of the System 25 Trio
S1125 is not just “glue.” It is a high-performance, two-part epoxy specifically developed to match the chemical and heat resistance of DR-25 tubing and -25 molded parts [12]. Together, they form the System 25 Product Trio—the industry’s most robust defense against the elements [13, 14].
Technical Properties: Built for Extreme Fluids
Operating in a temperature range from -55°C to +150°C, S1125 is engineered to resist aggressive solvents, diesel fuel, and hydraulic fluids [11, 15]. Its “low outgassing” properties also make it suitable for space equipment and high-vacuum environments [12, 16].
- Mixing: Supplied in convenient bi-packs to ensure a perfect mix ratio every time [11, 17].
- Wicking Prevention: Forms a permanent bond that prevents moisture from traveling down the wires (wicking) into sensitive connectors [11, 18].
- Versatility: Bonds excellently to aluminum alloy adapters, polyolefin tubing, and even mild steel [15, 17].
Factory Expertise: Achieving a Professional Seal
With 20 years in the industry, we know that the correct application of S1125 is key. We provide complete kits, including dual syringes and mixing sticks, and support for high-volume customized packaging for industrial clients. When failure is not an option, the bond must be S1125.
