Gasket Tape

Gasket tape is an adhesive backed silicone foam or closed cell silicone sponge that is supplied on slit-to-width rolls. End users cut the gasket tape to length, peel and remove the backing, and bond the gasket tape in place. If a standard gasket tape is insufficient, use custom gasket strips instead.

Gasket Tape: The Stockwell Advantage

Stockwell Elastomerics inventories high performance gasket tape materials and converts them into ready to install products. Silicone sponge tapes and silicone foam tapes include materials from the Saint-Gobain Norseal® Silicone SNS Tapes, formerly called Strip-N-Stick®, and BISCO® silicones from Rogers Corporation.

Stockwell Elastomerics has extensive experience with sealing and gasketing applications and offers gasket tape materials that include:

• 480S
• HT-800
• HT-870
• BF-1000
• BF-2000
• R10470M
• 400FR

Gasket tape can be laminated to a high-performance acrylic or a high temperature silicone adhesive. Stockwell Elastomerics offers over 20 pressure sensitive adhesives (PSAs), and most are categorized as film supported acrylic, unsupported transfer film, or low surface energy. In addition to 3M adhesives, Stockwell DP-1001 high temperature silicone PSA for extreme conditions is available.

Stockwell Elastomerics is a Preferred Converter for Rogers Corporation and 3M and an authorized converter for Saint-Gobain. Stockwell Elastomerics is also one of the leading authorized suppliers for BISCO silicones in the United States. Gasket tape manufacturing is done in Philadelphia, Pennsylvania (USA).

The wide range of sponge gasket tapes and foam gasket tapes that Stockwell Elastomerics inventories and converts can meet most enclosure gasket needs. These silicone gasket tapes take into consideration long term use, UV and ozone exposure, extreme high/low temperatures, firmness, compression set, and flame resistance.

Gasket Tape Demonstration Video

Request a Free Silicone Sponge / Silicone Foam Gasket Tape Touch Brochure and Pre-Made Gasket Tape Sample Rolls

The tactile brochure as small samples of gasket tape materials to touch and feel. Small sample rolls are also available.

HT-800 Gasket Tape

HT-800 silicone foam is UL recognized for UL 50, UL 50E (periodic recompression and continuous compression), UL 508, UL 1571, UL 1572, and UL 94V-0. This makes HT-800 ideal for outdoor lighting gaskets and NEMA enclosure gaskets. HT-800 silicone foam and the closed cell silicone sponge used for 400FR meets 21 CFR 177.2600 suitable for indirect food contact.

Gasket Tape with Stockwell Elastomerics’ DP-1001 Silicone Adhesive for Extreme Conditions

Stockwell Elastomerics offers 3 gasket tapes with DP-1001 silicone adhesive backing in slit-to-width rolls for use in extra conditions.

The 3 gasket tapes with DP-1001 silicone adhesive are:

• R10470-M from Saint-Gobain is a closed cell silicone sponge that is UV resistant, provides long service life in rugged conditions, and meets ASTM D6576, Type 2, Grades B and C. R10470 is red/orange in color.
• BF-1000 from Rogers Corporation is a low density, open cell silicone foam with a UL 94V-0 flame rating. It is used for air diverting and dust sealing. BF-1000 is white in color.
• HT-800 from Rogers Corporation is a medium density, closed cell silicone foam with a UL 94V-0 flame rating. It passes the UL 50E recompression test and can provide weather sealing when deflected at 35 to 50%. HT-800 is black, gray or red in color.

With proper deflection, all these gasket tapes can be used to seal out rain, withstand outdoor conditions and temperature extremes. They have been specified for long term sealing of outdoor enclosures, industrial ovens and dryers, and ventilating and airflow applications subject to temperature extremes.

The Stockwell DP-1001 silicone adhesive that is used with these tapes contains an amber colored polyimide film support layer that provides dimensional stability when users remove the release liner and install the gasket strips. The polyimide film layer improves the shelf life of the silicone adhesive backing by preventing migration of the adhesive into the silicone sponge or foam.

The polyimide film also withstands a temperature range of -100°F to +500°F, thereby not limiting the performance of the silicone gasket in extreme temperature conditions. DP-1001 silicone adhesive is a total of .005” thick and has an easy peel release liner to aid installation.

Gasket Tape Material Considerations

When selecting a gasket tape material, the following should be considered:

• Indoor Applications – For dust and light water splashing, most gasket tapes can be used.
• Outdoor Applications – Dust, rain, snow, and hose down require closed cell foam or closed cell sponge.
• Spec Requirements – For NEMA 4, NEMA 4X, IP64, IP65, the material has to be functional with design but no material qualifications needed. For UL 50E, UL 94, the material has to be UL recognized (yellow card).
• Bonding Surface – Powder coats and certain plastics may require high strength adhesive.
• Temperature – Norseal SNS 100S offers a very wide temperature range. HT-800 gasket tape is available in certain thicknesses with 3M 350 series adhesive.
• Compression Set and Stress Relaxation – The gasket tapes offered by Stockwell Elastomerics offer very good resistance to compression set and stress relaxation making them ideal for enclosure gaskets.
• Flame Rated Foam Tape – Silicone foam materials typically meet UL 94V-0. HT-800 foam also meets FAR 25.853 requirements.
• Water Sealing – Aggressive wash down requirements such as IP64, IP65, IP66, NEMA 4, NEMA 4X, and UL 50 type 4 may require bonded corners to prevent the ingress of pressurized water.

Custom (Made-to-Order) Foam, Sponge and Adhesive Combinations

Stockwell Elastomerics can provide guidance on selecting the proper gasket tape material and adhesive backing for specific customer applications. For example:

• A film support adhesive backing to prevent stretching during assembly may be recommended.
• A transfer film adhesive to allow for making corners and radii as assembly technicians install the gasket tape.
• Stockwell Elastomerics also regularly supplies silicone foams with low surface energy acrylic adhesives for powder coated surfaces.

DP-1001 polyimide film supported silicone adhesive from Stockwell Elastomerics allows silicone foam and silicone sponge gasket tape with broad temperature range and longer shelf life to be supplied. The polyimide film support serves as a barrier to prevent the user side of the silicone adhesive from cross-linking prematurely, and allows for an extended shelf life compared to Norseal SNS 100S.

Norseal®, Strip-N-Stick® and COHRlastic® are registered trademarks of Saint-Gobain.

BISCO® is a registered trademark of Rogers Corporation.