DOWSIL 780 General Purpose Silicone

Acetoxy-cure silicone sealant for general applications.

Name: DOWSIL 780 General Purpose Silicone
Brand: DOW
Availability: InStock

DOWSIL™ 780 General Purpose Silicone is a versatile acetoxy-cure, one-component RTV silicone sealant designed for a wide range of both internal and external sealing applications. Its easy-to-use formulation allows for excellent adhesion to various building substrates without the need for mixing, making it ideal for general sealing and caulking tasks. With resistance to ozone, UV radiation, and temperature extremes, it ensures durability and reliability in diverse conditions.

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Technical Details

DOWSIL™ 780 General Purpose Silicone is suitable for a variety of applications, including but not limited to:

Sealing gaps and joints in construction

Caulking around windows and doors

Sealing around sinks, tubs, and showers

General sealing of plumbing fixtures

Weatherproofing and insulation applications

Sealing in HVAC systems

DOWSIL™ 780 General Purpose Silicone offers numerous advantages that make it an ideal choice for various sealing applications. Its unique formulation and properties ensure effective performance and user convenience, which are essential in construction and contracting projects.

Excellent adhesion to a wide range of building substrates
One-component formulation eliminates the need for mixing
Resistant to ozone and UV radiation for long-lasting durability
Performs well in extreme temperature conditions
Suitable for both internal and external applications
Easy application process enhances user efficiency

DOWSIL™ 780 General Purpose Silicone provides a range of technical specifications that illustrate its performance capabilities and application requirements:

Test Property	Unit	Result
Cure System	–	Acetoxy
Cure Rate (23°C or 73°F, 50% R.H.)	mm	1.8
Application Temperature	°C	+5 to +50
Application Temperature	°F	+41 to +122
Specific Gravity	–	0.96
Extrusion Rate	g/minute	650
Hardness (Shore A)	–	13

DOWSIL™ 780 General Purpose Silicone is engineered for various sealing applications, ensuring effective performance across multiple environments. Its formulation allows it to be utilized in both internal and external applications, making it a versatile choice for construction professionals.
Typical Applications:
DOWSIL™ 780 General Purpose Silicone can be effectively used in:

Sealing gaps and joints in construction projects.
Caulking around windows and doors to provide weather resistance.
Sealing areas around sinks, tubs, and showers, preventing water infiltration.
General sealing of plumbing fixtures to ensure leak-proof installations.
Weatherproofing and insulation applications, enhancing energy efficiency.
Sealing in HVAC systems, contributing to optimal operation.

Surface Preparation:
For best results, ensure that surfaces to be sealed are clean, dry, sound, and free from grease. Non-porous surfaces should be cleaned with DOWSIL™ R-40 Universal Cleaner or methylated spirits, and thoroughly dried with a clean, oil and lint-free cloth before applying the sealant.
Application Guidelines:
– The sealant should be applied within the recommended temperature ranges. – No primer is required for most surfaces; however, conducting an adhesion test is advised on acrylic baths.
Tooling and Finishing:
The joint should be tooled within 5 minutes of application to ensure proper adhesion and a smooth finish. For neat applications, adjacent areas may be masked with tape prior to sealing.

DOWSIL™ 780 General Purpose Silicone is supplied in convenient packaging for easy use:
– Supplied in 280 ml cartridges
– Packaged in boxes of 12 cartridges
– Available in clear, white, champagne, grey, and black colors

For warranty information regarding DOWSIL™ 780 General Purpose Silicone, please contact our SMCC team. We are here to assist you with any inquiries and provide details related to product warranty. Reach out using any of the contact methods available on our website.

Product FAQ

Can DOWSIL 780 be used in wet areas?

DOWSIL 780 is not recommended for continuous water immersion applications.

Is DOWSIL 780 suitable for exterior applications?

Yes, DOWSIL 780 is suitable for exterior applications.

Is DOWSIL 780 paintable after curing?

DOWSIL 780 is not recommended for painting after curing, as the silicone sealant may repel paint and affect adhesion.

Can DOWSIL 780 be used for structural glazing?

No, DOWSIL 780 should not be used for structural glazing applications.

Is DOWSIL 780 safe for food contact surfaces?

DOWSIL 780 is not suitable for surfaces in direct contact with food or drinking water.

Can DOWSIL 780 be used on plastic surfaces?

Yes, DOWSIL 780 can be used on plastic surfaces, but adhesion may be improved with a Dow primer. It’s recommended to conduct an adhesion test for best results.