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Auralex StopGap Acoustical Sealant , $21.99 - Add to Cart Skip to Product Information

Auralex StopGap Acoustical Sealant

Acoustical Sealant for Wall System Perimeters, Electrical Box Outlets, and Other Acoustic Breaks
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Auralex StopGap Acoustical Sealant
Auralex StopGap Acoustical Sealant
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Auralex StopGap Acoustical Sealant
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Available at Sweetwater, Auralex StopGap Acoustical Sealant is a high-performance, water-based formula designed to reduce sound transmission by sealing gaps and penetrations in wall systems. Ideal for use along wall perimeters and around electrical box cutouts, StopGap helps achieve optimal STC (Sound Transmission Class) and MTC (Mechanical Transmission Class) ratings. Formulated for long-term flexibility, StopGap dries to a tough surface film while remaining pliable. Unlike other sealants, StopGap leaves no messy runoff and is both paintable and non-staining, making it a clean, professional choice for any installation.

Note: This product cannot be shipped by air. Please contact your Sweetwater Sales Engineer with any questions.

Auralex StopGap Features:

  • Reduces sound transmission for improved acoustical performance
  • Stays flexible significantly longer than standard sealants
  • No residual runoff—clean and easy application
  • Paintable and non-staining
  • Flame retardant (meets ASTM C-834 standards)
  • Comes in a large 29 oz. tube

Offer applies only to single-receipt qualifying purchases. Select manufacturers may require that only the manufacturer’s products qualify towards the minimum purchase amount needed to be eligible for promotional financing. Otherwise, an invoice that meets the minimum purchase amount and contains at least one qualifying manufacturer product is eligible for promotional financing. No interest will be charged on promo purchase balance, and equal monthly payments are required on promo purchase until it is paid in full. The payments equal the amount financed divided by the number of months in the promo period, rounded up to the next whole dollar. These payments may be higher than the payments that would be required if this purchase was a non-promo purchase. During the last month(s) of the promo period the required monthly payment may be reduced due to the prior months’ rounding. Regular account terms apply to non-promo purchases. New Accounts as of 07/31/2025: Purchase APR is 34.99%. Penalty APR is 39.99%. Min Interest Charge is $2. Existing cardholders: See your credit card agreement terms. Subject to credit approval.

Offer applies only to single-receipt qualifying purchases. No interest will be charged on the promo balance if you pay it off, in full, within the promo period. If you do not, interest will be charged on the promo balance from the purchase date. The required minimum monthly payments may or may not pay off the promo balance before the end of the promo period, depending on purchase amount, promo length and payment allocation. Regular account terms apply to non-promo purchases and, after promo period ends, to the promo balance. New Accounts as of 07/31/2025: Purchase APR is 34.99%. Penalty APR is 39.99%. Min Interest Charge is $2. Existing cardholders: See your credit card agreement terms. Subject to credit approval.

The estimated required monthly payment shown which excludes taxes and delivery equals the amount financed divided by the number of months in the promo period, rounded up to the next cent. During the last month(s) of the promo period the required monthly payment may be reduced due to this rounding. These payments apply only with the financing offer shown. If you make these payments by the due date each month, you should pay off this amount financed within the promo period, if it is the only balance you are paying off. If you have other balances on your account, this payment will be added to any other minimum monthly payments.

Applies only to select items from this manufacturer. Ask your Sweetwater Sales Engineer for more details.