Silicone Sponge Tape (300 Series)

Silicone Sponge Tape (300 Series)

Silicone Sponge Tape (300) Series with adhesive on one side eliminates the need for mechanical fastening


Silicone Sponge Tape (300 Series)

The DuraStick® Silicone Sponge Tapes have been specially designed for use in a variety of demanding industrial applications. These tapes are manufactured by applying a specially formulated acrylic adhesive to a high-temperature, fiberglass reinforced silicone sponge. The resulting tapes are highly compressible, flexible and conformable; however, the fiberglass reinforcement allows the sponge to keep its shape and reduces stretch. DuraStick® Silicone Sponge Tapes are easy to apply and are excellent for use as gaskets, heat-sealing pads, cushions and thermal insulators.

DuraStick® Silicone Sponge Tape Characteristics

DuraStick® Silicone Sponge Tapes are engineered to retain the distinctive properties of silicone; however, by adding a glass fabric to the matrix, AFC is able to obtain the added benefits of dimensional stability, durability, excellent tensile strength, and extremely low elongation (<1%). The addition of an adhesive on one side eliminates the need for mechanical fastening. DuraStick® Silicone Sponge Tapes have received USDA approval for food processing and handling, and are FDA compliant (21 CFR177.2600). Furnished with a blue liner, these tapes can operate in temperatures from -40°F to 350°F (-40°C to 177°C).

Typical Applications


Sealing pads
Reynolds overwrap sealing

Additional applications exist. Contact AFC for more specific information.

Other Applications:
High temperature gaskets
Vibration dampening medium
Thermal insulation material
Cushioning tape

Styles Available



Nominal Thickness (Substrate)

Nominal Thickness (Adhesive)

Maximum Operating

Full Width

Full Widths

300-90A Acrylic 0.125″ .003″ 350°F (177°C) 36 10

Please note: Additional thicknesses and styles available upon special order.

Disclaimer: All figures provided in the above table are based upon ASTM D 4969-97, the Standard Specification for Polytetrafluoroethylene (PTFE) Coated Glass Fabric. The above tensile values are based upon the ASTM D902 test method and are not actual values of AFC’s materials. The above tensile values are 80% of the figures provided in Table 6 of specification D579. AFC states that its actual tensile will be greater than the above material specification and that actual tensile values will be provided upon request. AFC measures adhesion according to ASTM D 3654/D 3654M, Standard Test Methods for Shear Adhesion of Pressure-Sensitive Tapes, and actual adhesion values will vary. Edge Tear values are based upon ASTM D1424 (Elmendorf Tearing Test) and are average values that can vary.

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