1/2" 13mm 4-Layer Silicone Hose Caps with Clip,Vacuum Caps for Heater Core

A 4-PLY REINFORCED SILICONE CAP THAT SEALS COOLANT AND VACUUM LINES WITH CONFIDENCEProduct AttributesColors: BlackSizes: 2.36*0.87*0.87 inch, ID: 1/2 inch (13 mm), Wall Thickness: 5 mmWeight: 1.04 ozMaterial: SiliconePackaging: Hose Cap*1, Clamp*1Package Size: 4.58*3.84*1 inchTemperature Range: -40℉ to 392℉Product Functions & Features4-ply reinforced silicone resists tearing and holds its shape under pressure for a lasting sealWide temperature tolerance makes it suitable for both cold-weather starts and hot engine operationIncluded clamp secures the cap firmly and helps maintain a leak-resistant seal under vibration

• Detailed Dimensions: This car hose cap has a 13 mm inner diameter (1/2 inch) and features a 5 mm wall thickness for a secure seal. The overall length measures 2.36 inch, giving you enough coverage to cap off coolant, vacuum, and water lines
• 4-Layer Reinforced Silicone Build: Constructed from high-temp silicone with 4 layers of reinforcement, this car coolant cap resists tearing and holds its shape under pressure. The layered structure adds strength without sacrificing flexibility, so it conforms tightly to the hose end
• Versatile Sealing for Multiple Systems: Use this silicone vacuum caps on throttle body water passages, turbo bypass valves, vacuum ports, and heater core fittings. It handles temperatures from -40°F up to 392°F, making it suitable for engine bay applications where heat and cold cycles are common
• Complete with Clamp for Secure Fit: Your package includes 1 silicone cap and 1 matching clamp. This coolant bypass hose cap comes with a clamp that cinches down evenly around the hose, creating a tight barrier against leaks that holds up under vibration
• Important Compatibility Note: This coolant cap replacement works with coolant, water, and air systems but is not compatible with fuel and oil. DIYers and professional mechanics alike will find it useful for temporary leak repairs and line deletions