OSI® SC-175 Acoustical Sound Sealant is a non-flammable, latex-based sealant specially designed to reduce sound transmission and drafts in all types of wall systems where a sound-rated assembly is required. Its primary function is to achieve and maintain the specific STC (Sound Transmission Class) value of the system designed.
The paintable sealant remains flexible and adheres firmly to wood, metal studs, concrete, gypsum board and most other building materials. The easy-to-use sealant cleans up easily with soap and water.
Type - Synthetic latex rubber
Color - White
Solids by weight - 75%
Toxicity - Toxic only if swallowed
Flammability - Nonflammable
Flash Point - 200 °F. TCC
Tooling/Open Time - 15 Minutes
Tack Free Time - 30 Minutes
Cure Time - 2 - 7 days
Application Temperatures - 40° F minimum
Service Temperature - -5 °F - 170° F
Freeze-Thaw Stability - 3 cycles. Unaffected by freezing after curing
Shelf Life - 1 year from date made at 75° F
Sag or Slump - Mil (ASTM D2202)
VOC Level - 22g/l or <1% by st.
Shore "A" Hardness - 45 +/-5 (Cured 30 days @ room temp.)
Clean up - Water and soap before curing
Accelerated Weathering - No cracks, discoloration or chalking: 1000 hrs. in Xenon Arc Weatherometer