HPS Performance Products Silicone Coolant Bypass Cap

HPS Performance Products Silicone Coolant Bypass Caps are high-temperature reinforced silicone caps, also sold as heater hose caps or coolant port blockoff caps. They seal off unused coolant, water, air, and vacuum ports in your cooling system. They are made the same way as HPS reinforced silicone radiator hoses.

Key Features:

• 3-ply polyester reinforcement gives a heavy-duty, pressure-resistant seal.
• High-temperature rating from -65°F to +350°F (177°C).
• 4mm wall thickness helps the cap hold up under cooling system heat and pressure.
• UV and ozone resistant silicone for long service life.
• Versatile use on coolant and water ports, air ports, turbocharger bypass valve ports, vacuum ports, throttle body water ports, and heater cores.

Please note: HPS reinforced silicone caps are not compatible with fuel, oil, or any petroleum-based products. Reinforced caps are intended for cooling system pressure. Unreinforced vacuum caps are meant only for vacuum and very little pressure.

Choose the cap that matches the port you are sealing. A reinforced silicone cap is a durable fix for a leaking or unused coolant port, and it is built to last in demanding street, track, and performance applications.