EVIL ENERGY 3/8" Silicone Heater Hose Radiator Coolant Hose Straight SAE J20R3 CLASS-A 60 PSI 5FT Black

Meet the EVIL ENERGY 3/8-inch Silicone Heater Hose, a flexible, high-performance line designed for automotive cooling and heating tasks. The hose combines a braided polyester exterior with silicone inner and outer layers, delivering a balance of durability, heat resistance, and easy routing in tight engine bays.

Built to handle demanding conditions, this hose offers a broad temperature range and sturdy pressure tolerance without sacrificing flexibility. The result is a versatile component that can help you simplify installations, manage bulky routing, and reduce the risk of kinks during turns or bends. While it isn’t a universal cure-all, the design aims to support reliable coolant and steam transport in everyday applications.

Key specifications at a glance

• Inside diameter: 3/8" (9.5 mm); outside diameter: 11/16" (17.5 mm); length: 5 feet
• Working pressure: 60 psi; burst pressure: 246 psi; temperature range: -67°F to 356°F (-55°C to 180°C)
• Minimum bend radius: 38 mm; meets SAE J20R3 Class A requirements

Material and durability

The silicone core and jacket provide solid heat resistance and chemical stability, while the braided polyester layer adds structural support. Compared with standard EPDM hoses, silicone options like this one often offer a wider temperature envelope and potential for longer service life in hot or demanding environments.

This construction supports smoother coolant and steam transport, helping to maintain flow and reduce the risk of collapse under pressure. The hose is designed for flexible routing, which can simplify installation and maintenance in busy engine compartments or compact heating systems.

Applications and best practices

• Automotive cooling systems and vehicle heating circuits
• Residential or commercial water heaters and related plumbing setups
• Water transport for controlled-temperature systems and simple steam lines
• General use for coolant, air, and steam transport within its material limits

Note: Do not use silicone heater hose for alcohol, fuel, engine oil, or lubricants. Ensure proper fitment by confirming the ID/OD before installation, and avoid sharp bends beyond the recommended 38 mm radius to maintain integrity over time.

With its robust build and adaptable size, this hose is a practical choice for DIY enthusiasts and professional technicians who value reliability, ease of routing, and a broad temperature tolerance in everyday systems.