DogBone High Temperature Reinforced Silicone Coolant Cap - 1/4" ID (6.5mm) w/ Hose Clamp

DogBone Reinforced Silicone Caps (1/4")

While they may resemble traditional vacuum caps, these are designed to handle pressure and heat—not just vacuum. Vacuum caps lack internal reinforcement and are not suitable for cooling system applications.

Each DogBone Reinforced Silicone Cap is built using the same process as our reinforced silicone radiator hoses, featuring three layers of polyester webbing for superior strength and durability. This construction ensures reliable performance under high temperatures and pressure, providing long-term protection for your cooling system.

Perfect for use with coolant, water, air, turbocharger bypass valve ports, vacuum ports, throttle body water ports, heater cores, and more.
(Not compatible with fuel, oil, or petroleum-based products.)

Technical Specifications:

• Product Type: Reinforced Silicone Coolant Cap
• Temperature Range: -65°F to +350°F (-53°C to +177°C)
• Reinforced Layer: 3-ply Polyester
• Inside Diameter: 1/4" (6.5mm)
• Color: Black exterior, Red interior
• UV and ozone resistant