What is HT800 Silicone?

HT800 Silicone is a high-performance closed-cell sponge rubber known for its unique properties and versatility. The silicone rubber offers outstanding thermal stability, chemical resistance, electrical insulation, excellent memory, low stress relaxation, shock reduction and anti-vibration properties. This makes it ideal for use in a wide range of professional industries including automotive, electronics, aerospace, healthcare, and construction.

One of the key benefits of HT800 is its ability to withstand high temperatures of up to 200°C and its fire-retardant properties. For this reason, the material is frequently used within the automotive and aerospace industries where high temperatures are common. HT800 Silicone is also FDA certified and highly resistant to chemicals, oils, solvents, and acid, therefore serving a purpose in the healthcare industry for medical equipment seals and gaskets. In addition, the silicone sponge offers excellent electrical insulation properties and can insulate electronic components to provide protection against electric shock.

HT800 Silicone is available in both grey and black colours, with adhesive backing if required. Due to the materials many benefits such as durability, versatility, efficiency, safety and cost-effectiveness, its often chosen over its silicone counterparts for gaskets, seals and O-Ring manufacturing.  This blog will explore the properties, applications, and benefits of HT800 Silicone to help our clients understand whether the material would be the optimum choice for their project.

Why use HT800 Silicone?

HT800 Silicone rubber possesses a distinctive set of physical and chemical properties that make it suitable for wide range of industrial applications. Here are some of the key properties of the closed-cell sponge:

  • High-temperature resistance: HT800 Silicone can withstand extreme temperatures without losing its shape or physical properties. It can maintain its shape and properties even at temperatures as high as 200°C (392°F).
  • Electrical insulation properties: HT800 Silicone has excellent electrical insulation properties, making it ideal for use in electronic applications. It provides protection against electrical current and prevents electrical leakage.
  • Moisture and chemical resistance: HT800 Silicone is resistant to environmental factors such as moisture and chemicals, providing durability and longevity to the material.
  • Memory and low-stress relaxation: HT800 Silicone offers excellent memory and low-stress relaxation properties, allowing it to return to its original shape even after being compressed or stretched.
  • Shock reduction and anti-vibration properties: HT800 Silicone is a valuable material for applications where vibration or shock reduction is necessary. It can absorb shock and vibration, reducing the amount of stress placed on other components.
  • Fire retardant and FDA compliant: HT800 Silicone is fire retardant and compliant with FDA regulations, making it safe for use in applications that require compliance with safety regulations.

What is HT800 Silicone used for?

HT800 Silicone has been adopted by many professional sectors due to its excellent properties and benefits. Its thermal resistance stability, chemical resistance and electrical insulation properties have resulted in the material becoming prominent within the Electronics, Automotive, Aerospace, Healthcare and Construction industries. Below is an exploration into how HT800 Silicone is used in each sector:


HT800 Silicone is commonly used in the electronics industry for insulation of electronic components, outdoor communication, electronics, and lighting enclosures. It also finds use in sound and vibration dampening applications.


HT800 Silicone is used in the automotive industry for transportation vehicles, door seals, gap fillers, and for vibration dampening. It can absorb shock and vibration, reducing the amount of stress placed on other components, making it an ideal material for automotive applications.


The aerospace industry uses HT800 Silicone for thermal management solutions, gaskets, and seals. Its unique properties, including high-temperature resistance and chemical resistance, make it a valuable material for aerospace applications.


In the healthcare industry, HT800 Silicone finds use in medical equipment seals and gaskets, as well as for shock and vibration reduction. It is safe for use in medical applications as it is compliant with FDA regulations.


HT800 Silicone is also used in the construction industry for HVAC systems, lighting housing gaskets, and sound dampening applications. Its unique properties, including its resistance to high temperatures and moisture, make it a valuable material for construction applications.

Benefits of HT800 Silicone

As one of the most versatile and commonly used Silicone sponge materials on the market, HT800 Silicone offers a broad spectrum of benefits not found with other closed-cell sponge rubbers. To help our clients understand whether the material is suitable for their project, next an insight is provided into each of the benefits of HT800 Silicone.


HT800 Silicone is highly durable and can withstand harsh environmental conditions, including high temperatures and exposure to chemicals and moisture. Its closed-cell structure provides an effective barrier against water absorption and makes it highly resistant to wear and tear. The material is also resistant to UV radiation, making it an ideal choice for outdoor applications.

Longevity of Life

The material’s ability to maintain its shape and properties, even under extreme conditions, makes it a long-lasting solution for various applications. HT800 Silicone has excellent memory and low stress relaxation properties, allowing it to recover its shape after being compressed. This property ensures that it can provide consistent performance over an extended period.


HT800 Silicone’s unique set of properties makes it a versatile material that can be used in a wide range of industrial applications. It can provide efficient solutions for various applications, including sound and vibration dampening, insulation, thermal management, and sealing. Its excellent electrical insulation properties also make it a suitable material for electronic applications.


HT800 Silicone can provide efficient solutions for various applications. Its ability to absorb shock and vibrations makes it an ideal choice for applications that require damping, such as transportation vehicles, medical equipment, and machinery. It also has excellent thermal conductivity properties, allowing it to dissipate heat quickly and efficiently.


HT800 Silicone is fire retardant and FDA compliant, making it a safe material for use in various industrial applications, including those in the healthcare and food industries. It is also non-toxic and does not emit any harmful fumes, making it an ideal choice for applications that require materials that meet strict safety standards.


HT800 Silicone is a cost-effective material that offers numerous benefits and can provide efficient solutions for various industrial applications. Its versatility and durability make it a popular choice for manufacturers looking for cost-effective solutions without compromising on quality.

Where can you buy HT800 Silicone?

As a leading supplier of Silicone rubber materials and partners to a range of professional industries, at Delta Rubber Limited we stock and sell a comprehensive range of Silicone rubber products and components including HT800 Silicone Sponge in sheet form, cut strip or bespoke components such as gaskets and seals on request. We offer HT800 in a range of thicknesses to suit almost any application.

HT800 Silicone Sheet

We stock HT800 Silicone sheet in thickness from 0.4mm to 4.8mm thick, in standard sheet sizes measuring 915mm wide and in any length from 1 metre to a full 10 metre roll. To purchase the silicone sheet material, visit our online shop, we offer fast nationwide delivery on every order and always industry leading prices. If you require your HT800 Silicone with adhesive backing, please contact us to place an order.

HT800 Silicone Cut Strip

As part of our diverse range of in-house manufacturing services at Delta Rubber Limited, the majority of our rubber and sponge sheet materials are available in cut rubber strip form. HT800 Silicone is no exception, we offer the material in thicknesses from 0.4mm to 3.2mm thick (other thicknesses available upon request), any width from 10mm – 50mm wide and in standard lengths of 3 metres. The cut strip material come as standard with self-adhesive backing to help with installation. If you would prefer your HT800 cut rubber strip to be plain in a width unavailable online, please don’t hesitate to contact us for assistance.

Bespoke HT800 Silicone Components

If your project demands a bespoke component to be manufactured from HT800 Silicone rubber such as gaskets, O-rings, or seals, contact us with your enquiry and we will endeavour to provide cost-effective quotation in response. We have the in-house machinery and technologies to manufacture a vast range of HT800 Silicone rubber products and components, with increased accuracy and precision, shorter lead times and lower production costs for our clients.