Vibra-TITE 440 Hydraulic & Pneumatic Thread Sealant, 50 ml Purple — Fast‑Curing, 300°F Resistant

Vibra-TITE 440 is a fast-curing anaerobic thread sealant formulated to seal and lock hydraulic and pneumatic fittings up to 2" while resisting vibration, solvents, and temperatures up to 300°F.

This high-strength liquid sealant cures in the absence of air to form a durable polymer that fills gaps, prevents leaks, and secures threaded metal connections under demanding conditions. Supplied in a 50 ml purple bottle, Vibra-TITE 440 is engineered for fluid, power and gas system fittings—especially where vibration and high pressure are present. Follow surface-preparation instructions and recommended storage conditions for best performance.

How quickly does Vibra-TITE 440 cure and reach handling strength?

Cure speed depends on contact surfaces and whether an activator is used. With a compatible activator, parts typically fixture in under 30 minutes; without activator, initial fixture occurs in about 4 hours. Full cure is achieved at room temperature in approximately 24 hours.

• Fixture with activator: < 30 minutes
• Fixture without activator: ~4 hours
• Full cure: 24 hours at 68°F (20°C)
• Store at -10°C to 30°C; optimal 22 ± 4°C for best shelf life

What pressure, temperature and gap conditions can this sealant handle?

Vibra-TITE 440 is formulated for high-pressure hydraulic and pneumatic systems. It withstands temperatures up to 300°F and seals gaps up to 0.007 inches, offering robust performance against pressure and vibrational loosening typical in power and fluid systems.

• Maximum sealing pressure: 10,000 PSI
• Maximum temperature resistance: 300°F (149°C)
• Maximum gap fill: 0.007 inches
• Suitable for metal-to-metal threaded fittings up to 2" diameter

How should I prepare and apply Vibra-TITE 440 for reliable results?

Cleanliness and dryness are critical: remove oil, grease, dirt and old sealants before applying. The product is generally hand-applied directly from the bottle onto threaded parts; use a primer (N or T) or activator when faster fixturing is needed. Allow recommended cure time before pressurizing the system.

• Ensure parts are clean, dry, and free from oil/grease
• Apply directly from the 50 ml bottle to threads; assemble immediately
• Use suggested primer N or T for improved adhesion on challenging substrates
• Do not pressurize until full cure time has passed for the application

Who is this for: Vibra-TITE 440 is intended for maintenance technicians, hydraulic and pneumatic system assemblers, and engineers who need a reliable anaerobic thread sealant that resists vibration, solvents and high pressures. It works well in industrial service, mobile equipment repairs, filtration systems, servomechanisms and other applications where secure, leak-free threaded connections are essential. Follow storage guidelines and handling instructions to maximize shelf life and product performance.