Heavy Duty High Temperature Three Ply Reinforced Silicone Coolant Cap Bypass Heater Three Quarter Inch Fitting One And Five Eighths Inch Length 350 Fahrenheit Max Four Millimeter Wall Thickness Compatible With Coolant Water Air Turbo Bypass

Single Pack Heavy-Duty Reinforced Silicone Coolant Cap
✔️ 3/4" ID (19mm), 1-5/8" L (41mm), 4mm wall, 350°F rating

This heavy-duty reinforced silicone cap is designed to seal coolant and bypass ports in automotive cooling systems. It’s ideal for heater cores, turbo bypass valve ports, vacuum ports, and similar applications where high-temp performance and reliability matter.

✅ Inside Diameter: 3/4" (19mm)
✅ Overall Length: 1-5/8" (41mm)
✅ Wall Thickness: 4mm
✅ Temperature Rating: Up to 350°F (177°C)
✅ Material: 3-ply polyester reinforced silicone

💡 What is a high-temperature reinforced silicone cap used for in cooling lines?

Handy, durable solution for sealing ports in engine cooling and bypass systems.

• Seals coolant, water, and air ports under pressure
• 3-ply reinforcement for heat and pressure resistance
• 350°F (177°C) max rating for reliable operation
• UV and ozone resistant for long life