Window & Door Sealing Solutions

Cooper Standard ISG designs seals and gaskets for commercial and residential windows and doors, storefronts, curtain wall systems and other building applications.

Learn how we work with you to engineer components that will withstand environmental conditions, meet architectural specifications and fulfill performance requirements.


  • Standard & Custom Profiles
  • Molded Corners & Frames
  • Custom Material Mixing
  • Rubber & Plastic
  • UL Materials
  • Closed-Cell Sponge & Dense Compounds
Commercial Window & Door Gaskets

Commercial Window & Door Seals

Our engineered glazing seals, curtain wall systems, storefront gaskets and architectural components deliver long-lasting performance.

Residential Weatherstripping

Residential Weatherstripping

Seals for residential applications feature excellent weatherability, compression set and rebound properties to improve window and door performance.

iDea Seal

Slide-In Seals

Our iDea® Seal product line is perfect for commercial applications. With a rigid plastic slide-in base, these non-stretch seals will help you speed up production.

Silicone Teardrop Seals

Silicone Teardrop Seals

Easily install this UL-listed self-adhesive teardrop profile, which provides an excellent air/smoke seal. 

Silicone Setting Block

Setting Blocks

An 85 +/-5 durometer silicone setting block is durable, UV resistant and compatible with most sealants. (Job specific compatibility testing is recommended.)

Door Sweeps

Door Sweeps

Created for a strong seal against air, moisture and dust in any weather conditions, our door sweep is made from environmentally friendly PVC-FREE materials that are more durable and resistant to tears and cracks.

EPDM Door Seals

EPDM Door Seals

Standard and extended reach door seals offer a high-performance solution for entry door systems. A dual-durometer EPDM design prevents water wicking while providing UV and weathering resistance. Learn more in our Door Seal Sell Sheet.

Vulcanized Corner

Gasket Frames

Transfer molding can create simple corners or complex frames made up of multiple dissimilar profiles. Vulcanized corners can be installed as a single component, reducing the potential for leaks and improving assembly.

Window & Door Seal Considerations

Whether it is a standard profile or custom solution, work with us to optimize sealing components for your application. We can redesign an existing part or develop an entirely new component.

As an experienced window and door seal manufacturer, we provide creative and reliable solutions that help you meet requirements including:

  • Cost
  • Material
  • Compatibility
  • Profile Design
  • End-Use Conditions
  • Aesthetics
  • UL Specifications
  • Installation Processes
  • Other Project Considerations

Commercial and Residential

Discover new ideas for window and door systems in our Window and Door Brochure.

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Window & Door Seal Materials

Closed-cell sponge rubber, dense rubber and plastic are commonly used in building and construction sealing components. Materials we commonly work with include:

  • Silicone (VMQ)
  • EPDM (Ethylene Propylene Diene Monomer)
  • Chloroprene/Neoprene (CR)
  • Thermoplastic Vulcanizate (TPV)
  • Polypropylene (PP)
  • Polyvinyl Chloride (PVC)
  • See all materials


As a single-source supplier of these materials, Cooper Standard ISG gives you more versatility in the design process.

Rubber Material


Closed-Cell Sponge Seals

For applications that require superior compression properties, closed-cell sponge rubber often provides the solution. Unlike open-cell products, closed-cell sponge will not wick or absorb water.

The surface of the extruded part is smooth, without exposed cells. This makes closed-cell rubber an excellent choice for weatherstripping applications.

  • Sponge profiles may be coextruded with a dense base to allow for easy kerf insertion.

  • Closed-cell EPDM is the preferred choice for many window & door applications due to its cost-effectiveness, weatherability, UV resistance and other properties.

  • Custom silicone gaskets and silicone setting blocks can be used when higher performance or material compatibility is required.
Sponge Window Gasket


Window Gasket

This dual-durometer profile features a closed-cell sponge EPDM bulb with a dense EPDM base.

Window Gasket

By bonding a plastic extrusion to an EPDM profile, seal installation processes can be significantly improved. This co-polymer design is the foundation of our iDea® Seal process.

Profile Design

Many window and door applications call for custom profile designs to achieve the desired performance properties. These profiles can range from dense EPDM glazing seals to dual- and tri-durometer extrusions that combine sponge and dense materials.

Engineers will consider factors such as the required closing force and the direction of the load applied in order to achieve an effective seal.

Designing For Compression

When designing compression fit applications, it is necessary to have a 30–40 percent compression in the channel for sponge sections to hold the seal in place. By the same token, for dense sections, up to 10 percent compression is necessary to hold the seal in the channel.

Another consideration is size of the gap or opening the profile is expected to seal.

This includes both the minimum and maximum gap widths that exist in the application, taking into account tolerances of the enclosure and sealing material.

Commercial Glazing Seals


Corners & Gasket Frames

Vulcanized or transfer molded corners provide a superior solution to butt joints in critical window and door sealing applications, such as silicone curtain wall gaskets.

The transfer molding process involves connecting two or more rubber extrusions using a moldable material from a like compound.

This ensures material compatibility and avoids concerns about the breakdown of a joint over time. Cooper Standard ISG can use this technique to create simple corners or complex frames made up of multiple dissimilar profiles.

Gasket Frame


Window and Door Seal Coatings

Seal and gasket coatings are frequently used in the window and door industry to improve part installation and reduce abrasion. Coatings help ensure that window and door components perform properly while extending the life of the seal or gasket.

Coatings can be used on both rubber and flexible plastic materials. The coating layer may be applied to the entire part or to a localized area.

Learn more about Cooper Standard ISG's coating capabilities in our Sell Sheet.