LOCTITE® SI 5940

Known as LOCTITE 5940

Features and Benefits

A 1-part, black, solvent-free acetoxy silicone-based paste for bonding, sealing and gasketing.
LOCTITE® SI 5940 is a black, multi-substrate, acetoxy silicone compound primarily used as a general-purpose sealing and bonding agent, space-filling rubber adhesive or FIPG (form-in-place gasket). It cures when exposed to moisture in the air to form a tough, flexible, waterproof, oil-resistant silicone rubber bond. It’s solvent-free and offers excellent resistance to aging, shrinkage, cracking and discoloring. LOCTITE SI 5940 adheres to an array of materials, including clean metal, glass, most non-oily woods, silicone resin, vulcanized silicone rubber, ceramic, natural and synthetic fiber and many painted and plastic surfaces. Though typically used in applications with an operating range of -50°C to 200°C (-58°F to 392°F), it can short-term handle temperatures up to 220°C (428°F).
  • Solvent-free
  • Room Temperature Vulcanization (RTV) cure
  • Service/operating temperature: -50°C to 200°C (-58°F to 392°F)
  • Excellent resistance to aging, shrinkage and cracking
Read More

Technical Information

Chemical basis / base Acetoxy silicone
Color Black
Cure speed vs time 6.0 mm
Extrusion rate 200.0 g/min.
Fixture time 30.0 min.
Gap fill 6.0 mm
Key characteristics Thixotropic
Lab shear strength 1.3 N/mm²
Physical form Paste
Recommended for use with Ceramic, Composite, Glass, Metal: aluminum, Metal: steel, Plastic