Aeroflow Silicone Heater Hose Block Off Cap 5/8" 16mm I.D AF9289-062-01

Aeroflow Silicone Heater Hose Block Off Cap 5/8" 16mm 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 specifically designed to be installed on your cooling system. The block off cap is manufactured just like Aeroflow's reinforced silicone heater hoses, ensuring durability and reliability.

With three layers of polyester webbing for reinforcement, you can be confident that this block off cap will withstand the high temperatures and pressures of your cooling system for years to come. Ideal for DIY enthusiasts, tradies, and automotive professionals alike, this product is a must-have for maintaining a well-functioning cooling system.

Key features

• Reinforced silicone construction for durability.
• Three layers of polyester webbing for added strength.
• Designed for high-temperature and high-pressure applications.
• Versatile use for coolant, water, air, and vacuum ports.
• Easy installation for a secure fit.
• Not compatible with fuel, oil, or petroleum-based products.

Technical details

• Internal diameter: 5/8" (16mm).
• Material: Reinforced silicone.
• Application type: Block off cap for cooling systems.
• Temperature resistance: Suitable for high-temperature applications.

Applications / fitment

This block off cap is typically used in various automotive cooling systems.

• Passenger vehicles.
• 4x4 vehicles.
• Performance cars.
• Heater cores in automotive systems.
• Vacuum ports in engines.

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 policies.

Frequently asked questions

How do I install the block off cap?

Simply slide the cap over the desired port and ensure it fits snugly to create a secure seal.

Is this cap suitable for fuel or oil applications?

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

Can I use this cap on my heater core?

Yes, it is designed specifically for use on heater cores and other cooling system applications.

What temperature can this cap withstand?

The reinforced silicone construction allows it to withstand high temperatures typical in automotive cooling systems.

Is it easy to remove the cap if needed?

Yes, the cap can be easily removed when necessary, making it convenient for maintenance and repairs.