OSI® Pro-Series SC-175 Acoustical Sound Sealant (Tube)

OSI® Pro-Series SC-175 Acoustical Sound Sealant (Tube)

OSI® Pro-Series® SC-175™ Acoustical Sound Sealant can be used for wall and floor systems to seal cracks or gaps. This acoustic sealant is non-staining, non-flammable and easy to apply to your space.



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Weight 4 lbs
Coverage 86 linear ft. (1/4 in. bead)
Quantity 1 tube
Availability Usually ships in 1-3 business days

Where Can You Use OSI Acoustical Sealant?

For individual jobs for which you need an effective sealant to accompany your soundproofing, order a tube of OSI® Pro-Series SC-175 acoustical sound sealant from Soundproof Cow. Each tube provides 86 linear feet of acoustical sound sealant to insulate and soundproof areas that have air gaps and could allow unwanted sound transfer.

Soundproof barriers can block unwanted sound between rooms, but there are some situations where a more finessed solution is appropriate. If you have an air vent, door sill or old walls or flooring where cracks are allowing easy sound transmission from the outside, an economical, reliable tube of sound sealant is a much more cost-effective solution than trying to wrap or cover the entire area in soundproofing material.

We at Soundproof Cow have the perfect acoustic sound sealant for your needs in our water-based OSI® Pro-Series SC-175. This is a flexible, easy-to-use sealant that works effectively on its own or with other Soundproof Cow soundproofing solutions to help you reach the desired Sound Transmission Class (STC) value for any location.

This acoustic sealant is VOC-compliant, so it’s better for the environment, meets LEED requirements, is safer to use and is suitable for both exposed and unexposed soundproofing situations. Use a tube of OSI® Pro-Series SC-175 to cut down on air drafts, reduce moisture and block sounds coming through cracks in virtually any construction material, from concrete and metal to wood and drywall. Our sealant is a UL-tested and classified non-flammable substance that will not harden, separate or crack.

You’ll love working with a tube of OSI® Pro-Series SC-175 Acoustical Sound Sealant. You can paint right over it once it cures, use it just about anywhere and clean up easily with just soap and water. It’s also non-migrating, which means you can be confident that it will stay wherever you put it.

Put the finishing touches on your next construction project by ordering a tube of this miraculous sealant now. Call 1-866-949-9269 to order today!


OSI® Pro-Series® SC-175™ Acoustical Sound Sealant is a water-based sealant designed to reduce sound transmission in both exposed and unexposed walls and partition systems. Its’ Primary function is to achieve and maintain the specific STC (Sound Transmission Class) value of the system design. VOC compliant.

Product Availability

Also available in Case of 12


  • UL-tested and classified
  • Non-flammable formulation
  • Easy application and clean up
  • Will not harden, crack or separate
  • Non-staining and non-migrating
  • High degree of adhesive and cohesive strength

Instructions / Details


Soap and Water

Drytime (Cure Time)

2-7 Days

Best Uses

OSI® Pro-Series® SC-175™ Acoustical Sound Sealant was developed primarily for commercial construction utilizing lightweight cavity walls and floor systems. The sealant is used for exposed and unexposed applications at perimeter joints, floor and ceiling runners (either wood or metal), cut-outs in gypsum board, veneer plaster systems and other areas where a sound rated assembly is required.

Customer Reviews

Average Customer Ratings: 4.8 (34 reviews)

The times I talked with you on the telephone and corresponded through email you have been very helpful and efficient. I would highly recommend Soundproofcow.com to anyone!

– S. Cimino, PA

I have emailed a lot of different manufactures and I have to say your customer service is head and shoulders above all of them. I emailed your company at about 9pm my time and when I woke up the next morning you had already answered my question and then the follow up was a few hours later. I am impressed. Thanks a lot for the quick turn around!

– E. Gustafson, NV

I just wanted to send a quick thank you for your rapid response and helpfulness. I very much appreciated it. You have been responsive in every way all through the process. It has been a pleasure doing business with you and your company.

– T. Alexander, CA

I just wanted to let you know that in the end, sealing the air spaces on this door worked just fine and took care of the problem.

I really appreciate you taking so much time to share your expertise with me, and in particular recommending I try the simpler solution before investing in more expensive noise barriers. That is a big credit to you and your business.

– Mike

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