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Home > About > Saint-Gobain Partnership

Stockwell Elastomerics, a Saint-Gobain Partner

Saint-Gobain logo

Saint-Gobain is multinational materials manufacturer, best known to consumers in North America for their CertainTeed brand of construction materials. Saint-Gobain Performance Plastics, based in New York state, manufactures silicone materials - NORSEAL® Silicone, previously known as COHRlastic® Silicone.


COHRlastic Silicone

Starting with the COHRlastic brand name, Saint-Gobain has been a longtime leader in quality and high performance silicone sponge and solid silicone rubber. The COHRlastic silicone sponge family of materials included: R10400, R10404, R10450, R10460, R10470, and R10480. Also included in the COHRlastic sponge line is R10490, a unique fluorosilicone sponge, and COHRlastic Strip-N-Stick® gasket tapes.

Products in the COHRlastic solid silicone product family include 9030, 9040, 9050, 9060 and 9070, which are specification grade solid silicone sheet materials made with peroxide catalyst. Also in the COHRlastic solid silicone rubber family is 9235, 9255 and 9275 high tear strength silicone rubber sheets.


COHRlastic becomes NORSEAL

NORSEAL logo

In late 2014, Saint-Gobain announced the transition of the brand name COHRlastic into the NORSEAL brand. The NORSEAL brand is best known for its PVC foam glazing tapes but there is variety of polymers and products in this brand portfolio.

The transition from COHRlastic Silicone Rubber to NORSEAL Silicone is a change in brand name only; the products and the individual product names (e.g. R10470) remain the same. Stockwell Elastomerics recognizes both brands of silicone sponge sheet and solid silicone sheet materials.


NORSEAL / COHRlastic Silicone Sponge Sheet Products

The following list shows many of the NORSEAL silicone sponge materials used at Stockwell Elastomerics, along with their corresponding former COHRlastic name.

  • NORSEAL R10400 - UL 94V-0 Closed Cell Silicone Sponge, Medium (formerly COHRlastic R10400)
  • NORSEAL R10480S – Closed Cell Silicone Sponge, Low Compression Set, Soft (formerly COHRlastic R10480S)
  • NORSEAL R10480M – Closed Cell Silicone Sponge, Low Compression Set, Medium (formerly COHRlastic R10480M)
  • NORSEAL R10470M – Closed Cell Silicone Sponge, Specification Grade, Medium (formerly COHRlastic R10470M)
  • NORSEAL R10470F – Closed Cell Silicone Sponge, Specification Grade, Firm (formerly COHRlastic R10470F)
  • NORSEAL R10460M – UL 94HBF, Closed Cell Silicone Sponge, Medium (formerly COHRlastic R10460M)
  • NORSEAL R10404 – Thermally Conductive, Closed Cell Silicone Sponge, Medium (formerly COHRlastic R10404)
  • NORSEAL R10490 – Closed Cell Fluorosilicone Sponge, Medium (formerly COHRlastic R10490)
  • NORSEAL R10450 – Reinforced, Closed Cell Silicone Sponge, Reinforced, Medium (formerly COHRlastic R10450)

NORSEAL / COHRlastic Silicone Tapes

The following list shows many of the NORSEAL silicone tape products used at Stockwell Elastomerics, along with their corresponding former COHRlastic name

  • NORSEAL Silicone SNS Tape 200A – Medium Silicone Sponge with Acrylic PSA (formerly COHRlastic Strip-N-Stick 200A)
  • NORSEAL Silicone SNS Tape 100S – Medium Silicone Sponge with Silicone PSA (formerly COHRlastic Strip-N-Stick 100S)
  • NORSEAL Silicone SNS Tape 300AR – Reinforced Silicone Sponge with Acrylic PSA (formerly COHRlastic Strip-N-Stick 300AR)
  • NORSEAL Silicone SNS Tape 512AF – Silicone Foam with Acrylic PSA (formerly COHRlastic Strip-N-Stick 512AF)

NORSEAL / COHRlastic 9030-9070 Solid Silicone Sheet Products

The following list shows the five NORSEAL silicone sheet products used at Stockwell Elastomerics, along with their corresponding former COHRlastic name

  • NORSEAL 9030 - 30 durometer silicone rubber (formerly COHRlastic 9030)
  • NORSEAL 9040 - 40 durometer silicone rubber (formerly COHRlastic 9040)
  • NORSEAL 9050 - 50 durometer silicone rubber (formerly COHRlastic 9050)
  • NORSEAL 9060 - 60 durometer silicone rubber (formerly COHRlastic 9060)
  • NORSEAL 9070 - 70 durometer silicone rubber (formerly COHRlastic 9060)

NORSEAL / COHRlastic 9200 Series High Strength Solid Silicone Products

The following list contains three NORSEAL high performance solid silicone rubber products used at Stockwell Elastomerics, along with their corresponding former COHRlastic name

  • NORSEAL 9235 - 30 durometer high strength silicone rubber (formerly COHRlastic 9235)
  • NORSEAL 9255 - 50 durometer high strength silicone rubber (formerly COHRlastic 9255)
  • NORSEAL 9275 - 70 durometer high strength silicone rubber (formerly COHRlastic 9275)

Stockwell Elastomerics' Use of Saint-Gobain Products

Stockwell Elastomerics is been a long time supplier of Saint-Gobain silicones and maintains inventory of most NORSEAL Silicone products for fast gasket production. In addition, Stockwell Elastomerics is a 3M Select Converter and laminates acrylic and silicone pressure sensitive adhesives to most NORSEAL silicone products. Stockwell Elastomerics' in-house die cutting, waterjet cutting, and flashcutting allow for quick turn custom silicone gaskets made from NORSEAL / COHRlastic silicone products.

Contact Stockwell Elastomerics

Contact Us for further assistance with materials from Saint-Gobain.


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