HT800 Silicone Sponge Strips

HT800 Silicone Sponge Strips

At Advanced Seals & Gaskets Ltd (ASG), we manufacture and supply HT800 Silicone Sponge strips, a medium-firmness, flame-retardant silicone material designed for high-performance sealing, cushioning, and vibration isolation applications.

HT800 silicone sponge is supplied in rolls 915mm wide with thicknesses from 0.8mm to 12.7mm, which can be cut into strips of any width and length, tailored to your exact specifications. Our in-house production ensures quality control, precise dimensions, and fast turnaround, whether for small bespoke orders or high-volume runs.

We can supply HT800 strips with a plain finish or laminated with self-adhesive foils or other materials for additional functionality.

What Are HT800 Silicone Sponge Strips?

HT800 Silicone Sponge strips are closed-cell, lightweight, medium-firmness strips made from flame-retardant silicone sponge. The closed-cell structure makes these strips ideal for:

  • Sealing against dust, air, and moisture

  • Cushioning between moving parts

  • Anti-vibration applications

  • Acoustic insulation

HT800 strips are often used like gaskets, filling gaps and irregularities between surfaces or as protective components in HVAC systems, electrical enclosures, lighting fixtures, and transport equipment.

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Product Enquiry

For information on HT800 Silicone Sponge Strips please complete the following quick enquiry or call us on +44(0)1384 252555.






    Key Specifications & Characteristics

    • Colour: Grey, Red, Black

    • Thickness Range: 0.8mm – 12.7mm

    • Roll Width: 915mm

    • Temperature Range: -55°C to +200°C

    • Flame Retardancy: UL94 HF1 & V-0, low smoke, meets BS6853 Cat 1A, LUL approved

    • Resistances: UV, ozone, fire

    • FDA-compliant for food, drink, and pharmaceutical applications

    Complete technical data is available on request or via our online portal.

    Download Product Specification Sheet

    Why Use HT800 Silicone Sponge Strips?

    HT800 silicone strips are a versatile and reliable solution for sealing, cushioning, and insulating applications. Key uses include:

    • Gasket-like sealing – fills gaps between surfaces, prevents dust, air, gas, and liquid ingress

    • Vibration and shock absorption – reduces noise, rattling, and wear on moving parts.

    • High-temperature and fire-resistant applications – suitable for both indoor and outdoor use

    • FDA-compliant applications – ideal for food, drink, and pharmaceutical environments

    HT800 combines the benefits of standard silicone sponge with enhanced flame-retardant properties, excellent memory, and low stress relaxation, thereby reducing costs associated with seal failure or material fatigue.

    Benefits of HT800 Silicone Sponge Strips

    • Lightweight, durable, and versatile

    • Excellent compression set and memory

    • Closed-cell structure for superior sealing

    • UV, ozone, and flame resistant

    • Meets rigorous UL, railway, and aerospace standards

    • Easily converted into bespoke strips and components.

    Advantages of HT800 Silicone Sponge Strips

    • Reliable sealing against air, dust, moisture, and liquids

    • Shock and vibration damping – ideal for electronic and transport applications

    • Durable in extreme temperatures – from -55°C to +200°C

    • Flame retardant and low smoke emission – compliant with BS6853 Cat 1A and London Underground requirements

    • Reduces maintenance costs – low-stress relaxation prevents premature seal failure.e

    HT800 strips are widely used in outdoor sealing, HVAC, electrical enclosures, lighting systems, transport vehicles, and industrial machinery.

    Available Grades of Silicone Sponge

    ASG also supplies a range of other silicone sponge grades for specialised applications:

    • High-Temperature Sponge: Medium-density, soft and pliable, suitable for -60°C to +270°C (300°C intermittently)

    • Fluorosilicone Sponge: Blue, oil, chemical, and fuel resistant, with excellent electrical strength

    • Thermally Conductive Silicone: Closed-cell sponge offering thermal conductivity and electrical isolation

    • High Recovery Silicone Sponge: Red oxide or black, closed-cell with a fabric finish, ideal for printing and cushioning

    • FDA Silicone Sponge: White, platinum-cured, medium-density sponge compliant with FDA 177.2600 and EC 1935/2004 standards

    Why Choose ASG for HT800 Silicone Strips?

    At Advanced Seals & Gaskets Ltd, we combine in-house production, state-of-the-art machinery, and a skilled workforce to supply high-quality HT800 silicone strips. Every strip is cut, finished, and inspected onsite, ensuring:

    • Consistent dimensions and quality

    • Competitive pricing

    • Fast turnaround times for urgent projects

    • Bespoke solutions for any industrial, commercial, or technical application
    Have a Question about HT800 Strip?

    Please contact us using the form below or by calling us on +44(0)1384 252555.