Loctite HVHT is a high-performance RTV silicone gasket sealant designed for sealing and protecting flange assemblies and mechanical joints exposed to high temperatures and demanding operating conditions. It cures at room temperature upon exposure to atmospheric moisture, forming a tough, flexible silicone rubber gasket that provides long-lasting resistance to oils, coolants, water, weathering, vibration, and thermal cycling.

Its high-viscosity, high-temperature (HVHT) formulation allows it to fill gaps and surface irregularities while maintaining excellent flexibility after curing. The sealant resists cracking, shrinking, and hardening, ensuring a durable leak-proof seal even under continuous vibration and temperature fluctuations. It is commonly used as a replacement for conventional pre-cut gaskets in automotive, industrial, and maintenance applications.

Loctite HVHT adheres well to metals, glass, ceramics, and many engineering plastics, making it suitable for a wide range of sealing applications. It is widely used in engines, transmissions, gearboxes, pumps, compressors, and industrial machinery where reliable high-temperature sealing is essential.

Key Features

• High-viscosity RTV silicone gasket sealant
• Excellent resistance to high temperatures
• Forms a flexible, durable, leak-proof seal
• Resists oils, coolants, water, and weathering
• Withstands vibration and thermal cycling
• Fills gaps and surface imperfections
• Replaces conventional cut gaskets
• Easy to apply and cures at room temperature

Typical Applications

• Engine and transmission assemblies
• Valve covers and oil pans
• Water pumps and thermostat housings
• Gearboxes and differential housings
• Industrial pumps and compressors
• Metal flange sealing in industrial equipment

Benefits

• Prevents leaks and fluid contamination
• Reduces maintenance and equipment downtime
• Maintains flexibility over a wide temperature range
• Simplifies assembly by eliminating conventional gaskets
• Provides reliable, long-lasting sealing performance

Loctite HVHT is a dependable high-temperature silicone gasket maker for automotive and industrial applications, delivering durable sealing, excellent flexibility, and long-term protection against heat, vibration, and harsh operating environments.