HT800 Strip

At Advanced Seals and Gaskets Ltd, we manufacture and supply a range of silicone strips in various densities and grades. One such material is HT800 Silicone sponge, which is a medium firmness sponge with flame retardant properties, manufactured at 915mm wide, and in standard thicknesses ranging from 0.8mm - 12.7mm, at various roll lengths depending on the thickness from which we can cut strips.  

By following our customer's samples, drawings or given dimensions, we can produce bespoke HT800 silicone sponge strips using our bandsaws, strippers, log cutters and even presses depending upon the size and quantity of strips required.  In-house production allows us to closely oversee the whole production process to ensure that we consistently produce high quality, competitively priced strips. 

Our HT800 sponge strips are cut from sheets or rolls of material starting at 0.8mm thick, from just 4mm in width and in the length of a few millimetres up to the maximum length of the rolls of sponge.   During the conversion process, we can cut and supply the HT800 sponge strips in a plain finish or laminated with a choice of self-adhesive foils or even other materials.

What are HT800 Silicone Sponge Strips?

HT800 is a closed-cell, lightweight, versatile, medium firmness, flame retardant silicone sponge that offers enhanced sealing capabilities and is used in applications where fire safety is a concern as the material will offer low levels of flame propagation, low smoke generation and low emission of toxic gases.

The closed-cell structure of the HT800 sponge means it can be used in sealing applications against dust, moisture and air making it perfect for cutting into sealing strips.  HT800 silicone sponge strips are lengths of material often cut to a specific length or supplied as continuous rolls or coils to be cut as and when needed by the end-user. 

HT800 silicone sponge strips are often purchased to be used in the same way as a gasket, whereby they are used to create a seal between uneven surfaces and fill irregularities or for anti vibration and acoustic insulations.

Ht800 Strip

Product Enquiry

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






    Product Specification & Key Characteristics

    • Colour: Grey, Red, Black
    • Resistances:  UV, ozone and fire 
    • Flammability: Flame retardant to UL94 HF1 and V-0, Low smoke, Meets flame and smoke toxicity ratings and the highest UL, railway, and aerospace standards  (BS6853 Cat 1A approved for use in rail vehicles and is LUL (London Underground) approved for use on the London Underground network)
    • Temperature range of -55° to +200°
    • Standard thicknesses: from 0.8mm to 12.7mm
    • FDA compliant

    Full technical data can be supplied upon request,
    or downloaded from our online portal.

    Help and guidance

    If you would like to speak to a representative to discuss your specific application or requirements please call our sales office direct on 01384 469100, alternatively you can send an E-mail. Simply click on the link and forward us your details along with your question and we will contact you immediately.

    Samples - Technical HT800 Strip

    Samples can be submitted for testing upon request.

    Call now for sample requests or further help.

    Why use HT800 Silicone Sponge Strips?

    HT800 Silicone sponge strips are often used in the same way as gaskets, whereby they fill gaps and irregularities between surfaces and provide a solution to unwanted rattles, noise, vibrations, seal against air, gas, dust and liquids, and provide cushioning between moving parts. 

    HT800 strips offer many desirable properties with many of our customers choosing this grade of silicone as it has all the properties of a standard silicone sponge but is flame-retardant and FDA approved. 

    HT800 silicone sponge strips offer excellent heat resistance and are also resistant to UV light, ozone and most moderate chemicals.  HT800 silicone strips can be used as internal or external seals for use in HVAC, electrical enclosures or lighting systems or as shock and vibration cushioning strips in transport.

    Benefits of using HT800 Silicone Sponge

    • Lightweight, durable and versatile material
    • Excellent memory, how stress relation and good compression set
    • Closed-cell structure creates an excellent seal
    • UV, Ozone and Flame resistant 
    • Meets flame and smoke toxicity ratings and the highest UL, railway, and aerospace standards  (BS6853 Cat 1A approved for use in rail vehicles and is LUL (London Underground) approved for use on the London Underground network)
    • Easily converted into a range of products

    Advantages of using HT800 Silicone Sponge Strips

    There are many advantages to using HT800 Silicone sponge to produce strips as the material offers highly efficient sealing capabilities, its resistance to UV, Ozone, extreme temperatures and fire, makes it suitable for a range of uses both indoors and out.  

    HT800 silicone strips are found widely used for applications such as outdoor sealing where it protects against the penetration of air, dust, moisture such as in lighting fixtures, air conditioning units, electrical cabinets and other outdoor enclosures.

    Due to its compression set, HT800 is also well suited for use in shock absorbing and vibration isolation in a range of electronic and transport applications, it demonstrates excellent memory and low-stress relaxation, which in turn reduces costs from the seal failure caused by poor compression set and softening.

    Different Grades of Silicone Sponge Available

    High-Temperature Sponge is a medium density silicone spine that is soft and pliable, used in a range of sealing and gasketing applications where a temperature range of -60°C to +270°C (300°C intermittently) is required.

    Fluorosilicone Sponge is a blue, closed-cell material that is resistant to oil, harsh chemicals, fuels and solvents.  It has an impressive operating temperature range of -62°C to +204°C, a low compression set and electrical strength 

    Thermally Conductive Silicone is a closed cell sponge that offers thermal conductivity and electrical isolation properties, found used in applications where a thermal transfer is required.

    High Recovery Silicone Sponge is manufactured with a  fine fabric finish on both sides, in a choice of red oxide or black colours  This closed cell sponge is popular with clothing and fabric printers because of its density and easy release properties.

    FDA Sponge is a medium density, closed-cell silicone, white in colour.  This particular grade of silicone sponge is platinum cured to conform to FDA 177.2600 and EC 1935/2004 standards for use as gasketing and sealing in food, drink and pharmaceutical applications.

    Have a Question about HT800 Strip?

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