Neutral-cure sealing. Dow DOWSIL 737 Neutral Cure Sealant is a one-part RTV adhesive/sealant with primerless adhesion to most materials. As a neutral-cure silicone, it cures at room temperature upon exposure to moisture in the air, forming a flexible rubber for bonding, sealing, and gasketing.
Primerless convenience. Its primerless adhesion to most materials means 737 can bond to many substrates with only good cleaning rather than a separate primer step, simplifying the process. This makes it a versatile choice for general bonding, sealing, maintenance, and formed-in-place gasket applications.
Neutral-cure advantage. Because it uses a neutral cure rather than an acetoxy system, 737 releases a milder by-product and is gentler on sensitive metals and electronics than vinegar-smelling acetoxy sealants. This supports its use across a broad range of materials without corrosion concerns.
Handling notes. As a moisture-curing sealant, cure depth and speed depend on humidity and section thickness, so deep sections cure more slowly. Surfaces should be clean for best adhesion. Review the product and Safety Data Sheets before use.
Recommended For
General bonding and sealing
Formed-in-place gasketing
Maintenance and repair sealing
Applications needing primerless adhesion
Sealing sensitive metals and electronics (neutral cure)
Key property: Primerless adhesion to most materials
Container size: 90 mL tube
Primary Industries
General industrial manufacturing
Electronics and electrical
Maintenance and repair
Appliance and equipment assembly
Standards and Certifications
None specified by source
FAQs
What is DOWSIL 737 used for?
It is a one-part neutral-cure silicone adhesive/sealant with primerless adhesion to most materials, used for general bonding, sealing, maintenance, and formed-in-place gasketing. It cures at room temperature to a flexible rubber, making it a versatile choice across many assembly and repair applications.
What does 'primerless adhesion' mean?
Primerless adhesion means 737 bonds to most materials with only good surface cleaning, without the need for a separate primer step. This simplifies the process and reduces the number of materials and operations required, saving time while still achieving reliable adhesion on many common substrates.
Why choose a neutral-cure sealant?
A neutral cure releases a milder by-product than acetoxy sealants (which give off a vinegar-like acetic acid), so 737 is gentler on sensitive metals and electronics. This allows it to be used across a broad range of materials with a lower risk of corrosion during and after curing.
How does 737 cure?
737 cures at room temperature on exposure to moisture in the air. Because atmospheric moisture drives the cure, cure speed and depth depend on humidity and section thickness; thicker or confined sections take longer to fully cure than thin, exposed beads. Ensure surfaces are clean for best adhesion.
Can 737 be used as a gasket material?
Yes. As a flexible RTV sealant with good adhesion, 737 can be used to form in-place gaskets that seal between mating parts. Its primerless adhesion and neutral cure make it convenient and gentle on components. Confirm suitability for your specific joint in the technical data sheet before use.
