Loctite SI 5926 Silicone Adhesive Blue
LOCTITE® SI 5926™ is a commercial-grade, multi-purpose flexible silicone sealant engineered to deliver reliable performance in demanding industrial applications. As a room temperature vulcanizing (RTV) silicone, it cures upon exposure to atmospheric moisture to form a tough, high-integrity rubber gasket that resists vibration, thermal expansion, and contraction.
Designed for professional engineering and automotive maintenance applications, this RTV blue silicone compound maintains its flexibility without hardening, shrinking, or cracking under intense environmental cycles. It offers excellent resistance to common automotive and industrial fluids, including motor oil, transmission fluids, alcohol, and antifreeze solutions.
Applications & Substrates
This versatile industrial sealant bonds effectively to metal, plastic, and painted parts. Typical applications include:
- Valve covers and timing gear covers
- Differential covers and oil/transmission pans
- Water pumps and thermostat housings
Technical Specifications
- Product: LOCTITE SI 5926 Blue 40ml
- Color: Blue
- Curing Type: Room Temperature Vulcanizing (RTV) / Moisture Curing
- Viscosity: Flow similar to SAE 10 Motor Oil
- Operating Temperature Range: -54°C to +204°C (-54°C to +150°C for specific continuous exposure applications)
- Key Substrates: Metal, Plastic, and Painted Surfaces
- Primary Application: Gasketing and Sealant
Application & Curing Instructions
- Surface Preparation: For optimal bond strength, ensure all surfaces are thoroughly clean, dry, and completely free from grease or oil.
- Assembly: Moisture curing begins immediately upon exposure to the atmosphere. Parts must be mated within a few minutes after the product is dispensed to ensure proper sealing.
- Full Cure: Allow the bond to fully cure (up to seven days depending on bead thickness and humidity) before subjecting components to heavy service loads.
- Clean-up: Excess uncured material can be easily wiped away using non-polar solvents. For cleanup and surface prep, ensure your team is equipped with Loctite 7063.
Frequently Asked Questions
Is LOCTITE SI 5926 safe for use on fuel systems or cylinder heads?
No. LOCTITE SI 5926 is strictly not recommended for use as a cylinder head gasket or a head gasket sealant. Additionally, it should not be used on components that come into direct, constant contact with gasoline.
What is the maximum operating temperature for LOCTITE SI 5926?
LOCTITE SI 5926 is rated for a broad operating temperature range of -54°C to +204°C, making it highly effective for high-heat environments like engine pans, water pumps, and valve covers.
How long does it take for LOCTITE SI 5926 to fully cure?
Moisture curing starts immediately upon exposure to air. While parts should be joined within minutes of dispensing, the sealant should be allowed to cure for up to seven days before subjecting the assembly to maximum operational stress or heavy service loads.
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