Overview

The BISCO RS-700 is a lightweight, resilient silicone sponge product used in industrial applications requiring high-temperature stability, flexibility, and electrical insulation. Some key features of this versatile sponge material include:

Temperature Resistance

• Withstands continuous use up to 500°F
• Retains flexibility even down to -85°F

Compression Set Resistance

• Highly resilient, retains over 90% of original thickness after compression

Electrical Insulation

• Non-conductive and non-arcing up to 11,000 volts

Chemical Resistance

• Inert to oils, solvents, and most acids and caustics

Applications

The BISCO RS-700 silicone sponge has many uses across a variety of industries:

Gasketing and Sealing

• For ovens, boilers, autoclaves, and other high-temperature equipment
• Used as expansion joint filler
• For irregular flanges and surfaces

Electrical Insulation

• Insulates electrical components and prevents short circuiting
• Used in switchgear, transformers, and electric motor end bells

Cushioning and Padding

• Absorbs vibration, shock, and noise
• Used for equipment anti-skid feet or pads

Specifications

Property	Value
Temperature Range	-85°F to 500°F
Tensile Strength	110 psi
Elongation	175%
Compression Set	10%
Dielectric Strength	500 volts/mil

Frequently Asked Questions

What are some alternatives to the RS-700 sponge?

Some alternatives include lower-temperature silicone sponges like the RS-500 (max 300°F), as well as non-silicone materials like neoprene, nitrile, EPR, and fiberglass-reinforced rubber sheets. The RS-700 is unique in its combination of high heat resistance, flexibility, and electrical insulation.

What thicknesses is the RS-700 available in?

Standard thicknesses range from 1/32″ to 2″ thick. Custom sizes can be fabricated as well. The material can be die cut into gaskets and other custom shapes.

Can the RS-700 be adhesive-mounted?

Yes, adhesive-backing can be applied to one or both sides of the silicone sponge for easy mounting. Common adhesives used include silicone, acrylic, and rubber-based adhesives.

Is the RS-700 sponge compressible?

Yes, the RS-700 is highly compressible and has excellent rebound characteristics. At 50% compression for 22 hours, it will regain over 90% of its original thickness. This makes it well-suited for applications requiring a compliant yet resilient foam.

Is the RS-700 available with a self-adhesive backing?

Yes, adhesive-backed versions like the RS-700-SA are available for easy installation. The adhesive is a high-temperature silicone that bonds aggressively to metals, glass, ceramics, and many plastics.