DOWSIL™ 7091: The ideal partner for high-performance, flexible industrial bonding

In the demanding world of industrial adhesives and sealants, DOWSIL™ 7091 stands out for its unique characteristics, making it a must-have product for many applications. If you’re looking for a robust, flexible solution capable of meeting the most severe technical constraints, this neutral alkoxy silicone adhesive/mastic is the ideal choice.

DOWSIL™ 7091: a versatile adhesive/mastic for professionals

DOWSIL™ 7091, produced by Dow, is designed to deliver outstanding performance in a variety of industrial environments. Its single-component, neutral-curing formula at room temperature makes it not only easy to apply, but also quick to set up. Here’s what makes this product an indispensable solution:

Key features

• Neutral Alcoxy silicone – odorless: DOWSIL™ 7091 is a neutral alkoxy silicone, which means that the reaction by-product released is Methanol, which is odorless.
  Its nature therefore makes it more pleasant to handle than acetic silicones whose reaction by-product is acetic acid, which has a pronounced vinegar odor and can cause problems on corrosion-sensitive metals (raw steel, aluminum, copper…).
  The latter are therefore prohibited in the vicinity of electronic boards or components, unlike DOWSIL™ 7091.
• Room-temperature polymerization: Curing takes place in contact with air humidity, at room temperature, offering ease of use on site.
• Paste consistency: Its non-sag texture enables precise application, even on vertical or complex surfaces.
• Flexibility and strength: Once cured, DOWSIL™ 7091 forms a flexible, durable rubber with excellent adhesion to many substrates such as aluminum, glass, ceramics, steel and some plastics.
• Temperature range: the sealant remains stable and flexible over an extreme temperature range from -40°C to 180°C, enabling it to respond to severe and fluctuating environments.

Technical performance

The mechanical properties of DOWSIL™ 7091 make it ideal for assemblies and applications requiring high performance:

• Elongation at break: 680%, which means it can absorb significant deformation, without tearing or losing its grip.
• Tensile strength: With a strength of 2.5 MPa, this adhesive/mastic guarantees a durable bond even under difficult conditions.
• Shore A hardness: 37, offering a good balance between rigidity and flexibility.

These technical performances enable high resistance to thermal shock, particularly in applications where materials subject to different thermal expansion, such as metal and plastic, are bonded together.

Key applications for DOWSIL™ 7091

The versatility of DOWSIL™ 7091 makes it a perfect solution for many industrial sectors. It is particularly suitable for:

• Bonding materials with different thermal expansion: Ideal for joining materials such as glass and metal with plastics, without the risk of uncoupling during temperature variations.
• Molded-in-place gaskets (FIPG): Used particularly in automotive assembly lines, DOWSIL™ 7091 is an excellent solution for making gaskets directly on site, guaranteeing optimum sealing and flexibility.
• Sealing in engine systems: Thanks to its ability to withstand high temperatures, this product is often used to ensure sealing and bonding in engines and other demanding industrial equipment.

Benefits for users

In addition to its outstanding technical features, DOWSIL™ 7091 offers many practical advantages for professionals:

• Excellent adhesion to a wide variety of substrates: Whether you’re working with metals, ceramics or certain plastics, DOWSIL™ 7091 ensures reliable, long-lasting adhesion.
• Fast curing: With a skin-forming time of just 10-15 minutes and no stickiness after 30 minutes, it’s perfect for fast-paced production environments.
• Railway standard compliance: DOWSIL™ 7091 is approved to EN 45545-2, HL1(R22), ensuring optimum safety in railway applications.

Markets of use

DOWSIL™ 7091 is particularly popular in the following sectors:

• Automotive: Used for cast-in-place gaskets (FIPG) and applications requiring high resistance to heat and chemicals.
• Rail: Compliance with fire safety standards in rail transport.
• Marine : Sealing portholes and windows, bonding and sealing deck equipment, sealing engine compartments, fastening panels and cladding.
• General industry: Ideal for bonding different materials in complex industrial environments.
• Electronics: Ensures effective bonding and durable sealing of electronic components.
• Construction: For applications requiring strong adhesion and prolonged flexibility in indoor and outdoor environments.

Conclusion

DOWSIL™ 7091 stands out as the solution of choice for industrial bonding professionals, combining performance, flexibility and speed of application. Its ability to adapt to a wide variety of substrates, resist extreme temperature conditions, as well as its fast curing speed make it a must-have product for companies looking for reliable, long-lasting solutions.

Whether you work in automotive, electronics, rail or general industry, DOWSIL™ 7091 offers you an effective technical solution to meet your specific needs.