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OSI SC175 Draft & Acoustical Sound Sealant
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At a Glance
Quick Decision Guide
Container Size
28 oz.
Color
White
Sealant Type
Latex-Based Acoustical Sealant
Primary Use
Sound-Rated Wall Systems
1/4" Bead Coverage
Approx. 86 ft.
3/8" Bead Coverage
Approx. 38 ft.
Paintable
Yes
Flexibility
Permanently Flexible
Why Choose This Product
Key Benefits
Sound Control
Reduces sound transmission through wall assemblies
Draft Reduction
Seals gaps and joints that allow air movement
Permanent Flexibility
Remains flexible after application
Broad Adhesion
Adheres to wood, metal studs, concrete and gypsum board
Paintable Finish
Can be painted after application
Easy Cleanup
Cleans up with soap and water
Product Information
Product Details
Specifications
Brand
OSI®
Part Number
1496542
UPC
028756988458
Product Type
Draft & Acoustical Sound Sealant
Size
28 oz.
Color
White
Base
Latex
Flexibility
Permanently Flexible
Paintable
Yes
1/4" Bead Coverage
Approx. 86 ft. (26 m)
3/8" Bead Coverage
Approx. 38 ft. (12 m)
Compatible Materials
Wood, Metal Studs, Concrete & Gypsum Board
Application
Sound-Rated Wall & Floor Systems
Application Standard
ASTM C919
Testing
UL 1479, UL 2079 & ASTM E84
VOC Compliant
Yes
Maximum Temperature
170°F
Cleanup
Soap & Water
About This Product
Acoustical Sealant for Sound-Rated Wall Systems
OSI® SC175 Draft & Acoustical Sound Sealant is a non-flammable, latex-based sealant designed to reduce sound transmission and drafts in sound-rated wall systems. It helps achieve and maintain the specified STC (Sound Transmission Class) value of the assembly while remaining permanently flexible after application.
Wall, Floor and Perimeter Joint Applications
SC175 is designed primarily for commercial construction using lightweight cavity walls and floor systems. It can be applied at perimeter joints, floor and ceiling runners, gypsum board cutouts, veneer plaster systems, and other locations where an acoustical seal is required. It is suitable for exposed and concealed applications.
Sealing Around Wall Penetrations
The sealant can be applied around electrical boxes and outlets, cold air returns, HVAC ducts, and other utilities that penetrate wall surfaces to improve acoustical performance. It can also be used to seal sill and base plates in residential construction and other non-fire-rated systems.
Flexible, Paintable and Easy to Clean
SC175 adheres to wood, metal studs, concrete, gypsum board, and most common building materials. The sealant remains flexible, can be painted after application, and cleans up with soap and water. It is VOC compliant and has been tested to UL 1479, UL 2079, and ASTM E84.
Common Questions
Frequently Asked Questions
What is OSI SC175 used for?
OSI SC175 is designed to reduce sound transmission and drafts in sound-rated wall and floor systems. Common applications include perimeter joints, floor and ceiling runners, gypsum board cutouts, and other areas requiring an acoustical seal.
Can SC175 be used around electrical boxes and HVAC penetrations?
Yes. It can be applied around electrical boxes, outlets, cold air returns, HVAC ducts, and other utility penetrations to improve acoustical performance.
What materials does OSI SC175 adhere to?
SC175 adheres to wood, metal studs, concrete, gypsum board, and most other common building materials. Compatibility should be confirmed with manufacturers of adjoining materials when working with PVC, CPVC, or certain metals.
How much coverage does a 28 oz. tube provide?
A 28 oz. tube provides approximately 86 linear feet with a 1/4" bead or approximately 38 linear feet with a 3/8" bead.
Does OSI SC175 remain flexible?
Yes. SC175 is formulated to remain permanently flexible after application.
Is OSI SC175 paintable?
Yes. The sealant is paintable after application.
Can SC175 be used where moisture or water immersion is possible?
No. It is not intended for water immersion or areas where moisture, frost, or condensation can occur.
What standards has OSI SC175 been tested to?
SC175 has been tested to UL 1479, UL 2079, and ASTM E84. Acoustical applications should be completed in accordance with ASTM C919.