Outus 3/4" Silicone Heater Hose 10ft Roll (Blue) — Reinforced 85 PSI High‑Temp Coolant Line

Outus 3/4" ID Silicone Heater Hose is a reinforced 10-foot silicone coolant line made for vehicle heating and radiator systems, offering high-temperature resilience, 85 PSI working pressure and easy cut-to-fit installation.

Built from silicone with a polyester braid, this 19 mm (3/4") inner-diameter hose comes in a 10 ft coil and is specifically designed for automotive heater cores, radiator bypass lines, and general hot-water or low-pressure steam transport. Its wide operating range and resistance to common engine fluids make it a practical replacement for worn rubber hoses and a handy spare for shop or roadside repairs.

How does this hose stand up to heat and pressure?

The Outus silicone hose is formulated to tolerate prolonged high temperatures and routine pressure cycles without cracking or hardening. It works reliably between -40°F and 230°F (-40°C to 160°C) and is rated to 85 PSI working pressure with a 170 PSI burst threshold, offering a solid safety margin for most vehicle cooling jobs.

• Temperature tolerance: -40°F to 230°F (-40°C to 160°C)
• Rated working pressure: 85 PSI (burst ~170 PSI)
• Reinforcement: polyester braid for added strength
• Durability: resists cracking and aging better than EPDM rubber

Will this fit my vehicle and how easy is it to install?

The hose has a 3/4" (19 mm) inner diameter and a 27 mm outer diameter, supplied as a continuous 10-foot roll so you can cut pieces to the exact length required. Its flexibility and kink resistance make routing around engine bays straightforward, and it seals well with standard hose clamps for a quick, no-fuss replacement.

• Inner diameter: 3/4" (19 mm); outer diameter: 27 mm
• Supplied length: 10 ft roll for custom cuts
• Installation: cut-to-fit and secure with standard clamps
• Flexibility: resists kinks for easier routing in tight spaces

What fluids and environments is this hose compatible with?

This silicone heater hose accepts a range of thermal media commonly found in vehicles and light industrial setups, including coolant, hot water, air and weak acids or alkalis up to 25%. It is engineered to tolerate antifreeze blends and standard engine coolants while maintaining shape and function under repeated heating cycles.

• Compatible fluids: coolant, hot water, air, weak acids/alkalis (≤25%)
• Resists common automotive coolants and thermal media
• Not recommended for concentrated strong acids or fuels
• Designed for automotive and light industrial use

How long will the hose last and what should I expect during high-temperature use?

Silicone’s properties give this hose a longer service life than many EPDM alternatives by resisting aging and cracking. Expect excellent longevity, though slight expansion or softening under extreme and sustained heat is normal and does not indicate failure if used within specified limits.

• Longer service life versus typical rubber hoses
• Resistant to aging, cracking, and splits
• Possible slight expansion or softening at very high temperatures
• Still performs reliably when used within temperature and pressure specs

Who is this for? Mechanics, DIY car owners, fleet maintenance teams and small shops that need a dependable, easy-to-cut coolant or heater hose will find the Outus 3/4" ID Silicone Heater Hose useful. It’s especially suited for vehicles that see repeated temperature cycling or for anyone replacing perished rubber heater lines who wants improved longevity and heat resistance without changing fittings or hose clamps.