DOWSIL™ 732 – Versatility and Performance Combined in a Single Adhesive and Sealant Product

In the fields of bonding and sealing, it is essential to rely on products that are reliable, durable, and adapted to the constraints of each environment. DOWSIL™ 732, developed by Dow, is an acetoxy silicone sealant that meets these requirements effectively.

At Samaro, a specialist in the distribution of specialty chemical products for industry, we support our customers in selecting high-performance technical solutions. DOWSIL™ 732 is one of the references we recommend for its versatility, proven performance, and multiple certifications. It is suitable for a wide range of industries—from food processing and aerospace to marine and household appliances.

In this article, we invite you to discover its key characteristics, advantages, and main applications.

Find out more about Dowsil silicones

What is DOWSIL™ 732?

DOWSIL™ 732 is a one-part acetoxy silicone sealant that cures at room temperature when exposed to moisture in the air. Designed by Dow, this product is ideal for bonding, sealing, and gasketing in demanding environments. Thanks to its advanced mechanical and chemical properties, it offers a reliable and long-lasting solution for highly regulated industries such as aerospace, food processing, marine, and electrical appliances.

Key Advantages of DOWSIL™ 732

✔ Excellent Multi-Surface Adhesion

DOWSIL™ 732 adheres efficiently to a wide range of substrates:

Glass
Aluminum and other metals
Engineering plastics
Ceramics
Rubber
Painted or enameled surfaces

This makes it a universal choice for many industrial applications requiring strong, lasting adhesion.

✔ Resistance to Water and Marine Environments

One of its most sought-after features is exceptional saltwater resistance, making it ideal for:

Marine and offshore environments
Outdoor applications exposed to extreme weather conditions
Areas prone to humidity and constant condensation

✔ Recognized Certifications and Standards

DOWSIL™ 732 complies with several major certifications:

FDA – safe for use in food-related environments
NSF-51 & NSF-61 – suitable for potable water and food contact equipment
UL94-HB – flame retardant according to recognized fire safety standards
MIL-A-46106 – conforms to U.S. military specifications for use in extreme conditions

Technical Performance:

DOWSIL™ 732 is a versatile acetic silicone sealant available in three colors: transparent, white, and black. It offers remarkable technical performance tailored to the needs of adhesion and sealing professionals.

Temperature Range: DOWSIL™ 732 can be used in extreme conditions, with a temperature range from -60°C to +180°C. It maintains its mechanical and sealing properties over a wide temperature range, ensuring long-term reliability.
Skin Formation Time: With a rapid skin formation time of only 7 minutes, DOWSIL™ 732 allows for efficient handling and work, reducing waiting time and increasing productivity.
Tensile Strength and Elongation: DOWSIL™ 732 offers a tensile strength of 2.3 MPa, ensuring a strong and durable bond.
Its elongation of 540% provides sufficient flexibility to withstand mechanical stresses and expansion/contraction movements.
Shore Hardness: DOWSIL™ 732 has a Shore hardness of A25, making it flexible and malleable, facilitating its application and adhesion to various substrates.

Applications by Sector

Food and Beverage Sector: Use DOWSIL™ 732 as a sealant for wine tanks, grinders, and mixers. Its versatility and water resistance make it an ideal choice for the food and beverage industry.
Aerospace Sector: Whether for exterior sealants or sealing engines, DOWSIL™ 732 meets the rigorous requirements of the aerospace industry.
Maritime Sector: With its resistance to immersion in seawater, DOWSIL™ 732 is perfect for window sealing and other maritime applications.
Household Appliance Sector: Use DOWSIL™ 732 for sealing and bonding oven doors. Its extended temperature range allows it to withstand high temperatures in household appliances.