Heat Sleeves- Open Seam

Each open seam sleeve features a dual-layer construction with a heat-resistant fibreglass insulation core and a durable aluminium reflective outer layer. The sleeve wraps easily around the component and is secured using either a high-temperature adhesive seam or a hook-and-loop Velcro seam. 

This practical solution is trusted in automotive, industrial, marine, and heavy equipment applications for shielding sensitive parts from radiant and conductive heat. 

Why Choose Open Seam Heat Sleeves?

In many cases, hoses and lines are already connected at both ends, making conventional sleeves difficult to install. For example, air conditioning pipes, fuel lines, or sensor wires near exhaust manifolds or turbochargers cannot be easily disconnected without risk of fluid loss or system damage. 

Kool Wrap’s open seam design eliminates this issue. Instead of threading the line through a fixed sleeve, simply: 

1. Cut the sleeve to your desired length 
2. Open the seam and wrap it around the component 
3. Secure it using the integrated adhesive strip or Velcro seam 

This makes Kool Wrap open seam sleeves one of the most convenient and efficient solutions for heat shielding pre-installed hoses or pipes. 

Features and Benefits 

Kool Wrap’s heat sleeves with open seams offer advanced protection, ease of use, and long-term durability. Key features include: 

• Double-layer construction – Reflective aluminium outer layer and fibreglass thermal insulation 
• High heat resistance – Withstands continuous exposure to extreme under-hood temperatures 
• Multiple seam options – Choose between adhesive seams for a compact fit or hook-and-loop Velcro seams for reusability 
• Flexible and trim-to-length design – Easily tailored to fit pipes, looms, and hose sizes 
• Colour variety – Available in silver, red, and gold finishes for custom builds and visibility preferences 
• Sizes ranging from 10mm to 30mm inner diameter – Suitable for vacuum lines, wiring harnesses, fuel lines, coolant hoses, and more 

These sleeves are a practical heat management upgrade for professional workshops, motorsport applications, restoration projects, and everyday vehicle maintenance. 

Ideal Applications 

Kool Wrap open seam sleeves are used widely across various industries. Common applications include: 

• Automotive engine bays – Protecting hoses and wiring near exhaust manifolds or turbo systems 
• Air conditioning lines – Preventing refrigerant lines from heat soak or vapour lock 
• Fuel and brake lines – Reducing risk of heat-related pressure loss or vaporisation 
• Electrical looms – Shielding wiring from radiant heat in hot environments 
• Industrial machinery – Managing thermal exposure in equipment and production lines 
• Marine vessels – Insulating engine bay lines in confined engine compartments 

Whether you are insulating a single pipe or an entire system, Kool Wrap’s open seam heat sleeves provide a professional-grade solution with easy application. 

Engineered for Heat Management Excellence

Backed by over 20 years of experience in heat protection, Kool Wrap delivers high-performance thermal insulation solutions trusted by race teams, fleet operators, mechanics, and DIY enthusiasts. Our open seam heat shield sleeves are designed for real-world performance, durability, and ease of use. 

These products are tested under extreme temperatures and conditions to ensure they perform reliably in any environment—from urban traffic to the toughest off-road trails or industrial machinery zones. 

A Smart Investment for Thermal Control and Component Longevity

Heat is one of the most common and destructive forces affecting engine bay components. Repeated exposure to high temperatures can degrade rubber, plastic, and electrical insulation—leading to premature failure, leaks, or electrical faults. 

By installing a Kool Wrap open seam heat sleeve, you provide effective thermal protection without disassembling complex systems. These sleeves help preserve the life of critical components, reduce maintenance costs, and support overall vehicle reliability and safety. 

With options to suit nearly every line size, engine bay layout, and performance requirement, Kool Wrap heat sleeves are the smart choice for modern heat management challenges.