General-purpose bonding and sealing. Dow DOWSIL 732 Multi-Purpose Sealant Clear is a one-component, non-slumping silicone paste used for bonding and sealing in industrial applications. It offers easy application, an acetoxy cure system, flexibility, and good dielectric properties, and it cures to a tough, flexible rubber with good adhesion to many substrates.
Cure behavior. 732 cures at room temperature when exposed to moisture in the air. On exposure, the applied material skins over, so any tooling should be completed before the skin forms; the surface is easily tooled with a spatula and becomes tack-free in under 45 minutes. After skin formation, cure continues inward, reaching a depth of about 3 mm in 24 hours at room temperature and 50% relative humidity; very deep or confined sections cure more slowly.
Performance range. The clear grade is stable and flexible from -60°C to +180°C, with short peaks up to +205°C, and offers excellent dielectric properties. Dow states 732 complies with MIL-A-46106 and with FDA 177.2600 (rubber articles intended for repeated use), and it is offered in white, black, clear, and aluminum.
Handling notes. Because it uses an acetoxy cure, 732 releases a small amount of acetic acid during curing, which can corrode certain metals, especially in direct contact or in fully enclosed conditions. For maximum adhesion, Dow recommends a primer; all surfaces must be clean and dry. Review the product and Safety Data Sheets before use.
Service temperature: -60°C to +180°C, short peaks to +205°C (clear grade)
Compliance: MIL-A-46106; FDA 177.2600
Container size: 17.7 kg pail
Primary Industries
General industrial manufacturing
Electrical and electronics
Appliance and equipment assembly
Food-contact-adjacent applications (per FDA 177.2600)
Standards and Certifications
Complies with MIL-A-46106
Complies with FDA 177.2600 (rubber articles for repeated use)
FAQs
What is DOWSIL 732 used for?
It is a one-part, general-purpose silicone adhesive/sealant for industrial bonding and sealing, and it can serve as a formed-in-place gasket material. It cures to a tough, flexible rubber with good adhesion to many substrates and excellent dielectric properties, making it versatile across many assembly applications.
How does DOWSIL 732 cure?
It cures at room temperature when exposed to moisture in the air using an acetoxy system. The surface skins over upon exposure, becoming tack-free in under 45 minutes, and the cure then continues inward, reaching about 3 mm depth in 24 hours at 50% relative humidity. Deep sections cure more slowly.
Does 732 release anything during cure?
Yes. As an acetoxy-cure silicone, 732 releases a small amount of acetic acid (a vinegar-like smell) as it cures. This can corrode some metals, especially in direct contact or fully enclosed cures. Consider a neutral-cure product for sensitive metals, and always follow the Safety Data Sheet.
What standards does 732 meet?
Dow states that DOWSIL 732 complies with MIL-A-46106 and FDA 177.2600, which cover rubber articles intended for repeated use. Because compliance details can depend on grade and application, users who need formal qualification should confirm the current status of their specific product and intended use before relying on it.
What temperatures can it withstand?
The clear grade is stable and flexible from -60°C to +180°C, with short peaks up to +205°C. That broad range suits many industrial sealing and bonding tasks. For sustained high-temperature service, verify the specific grade's limits against your application in the technical data sheet.
