Dow Corning 7091 Silicone Suitable for Engine Gaskets

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Dow Corning 7091

Dow Corning 7091 is a high performance, neutral silicone adhesive and sealant that cures at room temperature. Designed for automotive applications that require a strong but flexible bond, such as engine gaskets, auto headlamps and other parts.

Dow Corning 7091 is a robust and reliable adhesive & sealant, that provides excellent adhesion and tensile force, making it a good choice for a variety of applications. It remains flexible and stable from -55 to 180 ° C (-67º to 356º F) and has the ability to bond materials with different thermal expansion rates, such as glass, metal or plastic.

Dow Corning 7091 Silicone suitable for engine gaskets

This product  is a high viscosity sealant, easy to apply and provides unprimed adhesion to commonly used materials including enamelled and painted steel, aluminum, ceramic and glass as well as to certain plastics used in engineering applications.
Used as a Formed-in-Place Gasket (FIPG) material.

Dow Corning 7091 Features

  • One-component adhesive/sealant
  • Cures at room temperature when exposed to moisture in the air
  • Alkoxy cure system
  • Non-sag, paste consistency
  • Easy to apply
  • Cures to a tough, flexible rubber
  • Excellent adhesion to many substrates
  • Stable and flexible from -40°C  (-40°F) to +180°C (+356°F)

How to use Dow Corning 7091

Substrate preparation

All surfaces must be clean and dry. Degrease and wash off any contaminants that could impair adhesion. Suitable solvents include isopropyl alcohol, acetone or methyl ethyl ketone.

Good unprimed adhesion may be obtained on a variety of substrates, including enamelled and painted steel, aluminum, ceramic, glass and certain plastics. Substrates to which good adhesion is normally not obtained include PTFE, polyethylene, polypropylene and related materials.  For maximum adhesion, the use of Dow Corning® 1200 OS Primer is recommended. After solvent cleaning apply a thin coat of Dow Corning 1200 OS Primer by dipping, brushing or spraying.Allow primer to dry for 15 to 90 minutes at room temperature and a relative humidity of 50% or higher.

Dow Corning 7091

How to apply Dow Corning 7091

Apply a bead of Dow Corning 7091 Adhesive/Sealant (see Handling Precautions) to one of the prepared surfaces, then quickly cover with the other substrate to be bonded.

On exposure to moisture, the freshly applied material will “skinover” in about 10-15 minutes at room temperature and 50% relative humidity. Any tooling should be completed before this skin forms.

The surface is easily tooled with a spatula. The adhesive/sealant will be tack-free in approximately 30 minutes.

Dow Corning 7091 Video

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Dow Corning 7091 Cure time

After skin formation, cure continues inward from the surface. In 24 hours (at room temperature and 50% relative humidity) Dow Corning 7091 Adhesive/Sealant will cure to a depth of about 2mm. Very deep sections, especially when access to atmospheric moisture is restricted, will take longer to cure completely. Cure time is extended at lower humidity levels. Before handling and packaging bonded components, users are advised to wait a sufficiently long time to ensure that the integrity of the adhesive seal is not affected. This will depend on many factors and should be determined by the user for each specific application.

Handling precautions

When using solvents avoid contact with skin and eyes, heat, sparks and open flames. Always provide adequate ventilation. Obtain and follow handling precautions from the solvent supplier.

Product safety information required for safe use is not included. Before handling, read product and safety data sheets and container labels for safe use, physical and health hazard information. The material safety data sheet is available on the Dow Corning Website at You can also obtain a copy from corning.

Usable life and storage

When stored at or below 30°C (86°F) in the original unopened containers, this product has a usable life of 12 months from the date of production.

Packaging formats

This product is available in 310ml cartridge, 600ml sausage , 20-liter and 250kg cans.

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