Aeroflow Silicone Heater Hose Block Off Cap 1/2" 13mm I.D AF9289-050-01

Aeroflow Silicone Heater Hose Block Off Cap 1/2" 13mm I.D

The Aeroflow reinforced silicone heater block off cap is designed for coolant, water, air, vacuum ports, throttle body water ports, heater cores, and much more. While they look a lot like traditional vacuum caps, the internal material is designed specifically to be installed on your cooling system. The block off cap is manufactured just like Aeroflow's reinforced silicone heater hoses, featuring three layers of polyester webbing for reinforcement, ensuring they can withstand the high temperatures and pressures of your cooling system for years to come.

These silicone block off caps are not compatible with fuel, oil, or any petroleum-based products.

Key features

• Reinforced silicone construction for durability and longevity.
• Designed specifically for high-temperature and high-pressure applications.
• Compatible with coolant, water, air, and vacuum ports.
• Three layers of polyester webbing for enhanced strength.
• Easy to install and remove when necessary.
• Compact size suitable for various automotive applications.

Technical details

• Internal diameter: 1/2" (13mm).
• Material: Reinforced silicone.
• Application: Cooling systems, heater cores, throttle body water ports.
• Not suitable for petroleum-based products.

Applications / fitment

This block off cap is typically used in automotive cooling systems to seal off unused ports.

• Passenger vehicles.
• 4x4 vehicles.
• Performance and racing applications.
• Custom builds and modifications.
• Marine applications where cooling systems are present.

Why buy from Mick’s Gone Bush?

• Trusted Australian business focused on reliable power, auto-electrical, and service parts.
• Stock sourced from reputable distributors and brands.
• Practical support for trade, off-grid, and fleet customers.
• Clear shipping, warranty, and customer service.

Frequently asked questions

What is the purpose of the Aeroflow silicone heater hose block off cap?

The block off cap is used to seal off unused ports in a cooling system, preventing leaks and maintaining system pressure.

Can this cap be used with fuel or oil?

No, the silicone block off cap is not compatible with fuel, oil, or any petroleum-based products.

How do I install the block off cap?

Simply push the cap onto the desired port until it fits snugly. Ensure the surface is clean for a proper seal.

Is this product suitable for high-pressure applications?

Yes, the Aeroflow silicone block off cap is designed to withstand high temperatures and pressures typical in cooling systems.

What vehicles can use this block off cap?

This cap is suitable for a variety of vehicles, including passenger cars, 4x4s, and performance vehicles that require cooling system modifications.