HT800 Gasket

HT800 Silicone Gaskets – Flame Retardant & High-Performance

Advanced Seals & Gaskets Ltd manufactures and supplies high-quality HT800 silicone gaskets, designed to meet the most demanding sealing and gasketing applications. Made from HT800 silicone sponge, these gaskets offer medium firmness, excellent durability, and flame-retardant properties, making them ideal for industrial, electrical, and transport applications.

Our HT800 silicone sponge is produced in rolls 915mm wide, with standard thicknesses ranging from 0.8mm to 12.7mm, and is available in various roll lengths, depending on the thickness. From these rolls, we convert custom gaskets in a range of shapes, including simple strips, complex cut-outs, bolt-hole designs, and laminations.

Whether you need a single prototype gasket or a multi-thousand batch, our advanced machinery ensures precision, consistency, and high-quality finishes. HT800 gaskets can be supplied plain, laminated, or coated with adhesive or foil facings to suit your project requirements.

What Are HT800 Silicone Gaskets?

HT800 silicone sponge is a lightweight, medium-firmness, closed-cell material with flame-retardant properties. It is designed for applications where fire safety, UV resistance, and environmental sealing are critical.

The closed-cell structure makes HT800 gaskets ideal for sealing against dust, moisture, and air, providing low-pressure seals that prevent leakage of liquids or gases. HT800 gaskets can be used as strips, pads, or intricately cut shapes placed between two surfaces to create reliable seals in electrical enclosures, HVAC systems, and transport equipment.

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For information on HT800 Silicone Gaskets – Flame Retardant & High-Performance please complete the following quick enquiry or call us on +44(0)1384 252555.






    Product Specifications & Key Features

    • Colours: Grey, Red, Black

    • Resistances: UV, ozone, and fire resistant

    • Flame Retardancy: UL94 HF1 & V-0; Low smoke; BS6853 Cat 1A approved; LUL-approved for London Underground

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

    • Thickness: 0.8mm – 12.7mm (custom laminations available)

    • FDA Compliant

    • Closed-cell silicone sponge provides excellent sealing capabilities.

    Full technical data sheets are available upon request or can be downloaded from our online portal.

    Product Specification Sheet

    Advantages of HT800 Silicone Sponge

    • Flame Retardant: Complies with UL94 HF1 & V-0, BS6853 Cat 1A, and LUL standards

    • Heat & Temperature Resistant: Operates reliably between -55°C and +200°C

    • UV & Ozone Resistant: Ideal for outdoor and industrial environments

    • Durable & Lightweight: Excellent memory and low compression set

    • Closed-Cell Structure: Prevents intrusion of dust, air, and moisture.

    • FDA Approved: Suitable for food, beverage, and pharmaceutical applications

    Benefits of Using HT800 Silicone Gaskets

    • Enhanced Sealing: Closed-cell silicone sponge ensures an effective barrier against air, dust, moisture, and gases.

    • Shock & Vibration Absorption: Medium firmness and low compression set provide superior cushioning for electronics and transport systems.

    • Flame Safety: Flame-retardant properties reduce fire propagation, smoke generation, and toxic gas emissions.

    • Versatile Conversion: Easily converted into custom gaskets, strips, pads, or laminated products for unique applications.

    • Compliance & Standards: Meets rigorous UL, aerospace, railway, and London Underground standards, offering peace of mind for high-risk installations.

    Applications of HT800 Gaskets

    HT800 silicone gaskets are widely used across multiple industries:

    • Electrical Enclosures & Cabinets: Sealing against moisture, dust, and air ingress.

    • Lighting Fixtures: Protects against environmental elements while providing shock absorption.

    • HVAC Systems: Ensures airtight sealing and efficient thermal insulation.

    • Transport & Automotive: Reduces vibration, noise, and component wear.

    • Food & Pharmaceutical: FDA-approved grades for hygienic sealing applications.

    Different Grades of Silicone Sponge Available

    Advanced Seals & Gaskets also offers other high-performance silicone sponge grades:

    • High-Temperature Sponge: Medium-density silicone for applications ranging from -60°C to +270 °C.

    • Fluorosilicone Sponge: Blue closed-cell material, resistant to oils, fuels, harsh chemicals, and solvents.

    • Thermally Conductive Silicone: Provides thermal transfer while maintaining electrical isolation.

    • High-Recovery Silicone Sponge: Features a fine fabric finish, making it ideal for printing and fabric applications.

    • FDA Silicone Sponge: Platinum-cured, white silicone compliant with FDA 177.2600 and EC 1935/2004 standards.

    Advanced Seals & Gaskets Ltd provides precision-cut, custom HT800 silicone gaskets with exceptional sealing, fire resistance, and environmental protection. Perfect for demanding industrial, transport, and electrical applications, HT800 gaskets combine durability, compliance, and versatility in every strip, pad, or custom shape.

    📞 Call 01384 252555 to discuss your requirements or request a sample today.

    Have a Question about HT800 Gasket?

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