Auralex StopGap™ – Professional Acoustical Sealant for Sound Isolation

Ensure your soundproofing efforts aren't compromised by invisible air leaks with Auralex StopGap™ Acoustical Sealant. This highly elastic, water-based sealant is specifically designed to reduce sound transmission through gaps in walls, ceilings, and floors. StopGap™ comes in a professional-grade 28 fl. oz. tube, providing ample coverage for sealing joints, electrical outlets, and perimeters.

By creating an airtight seal that remains permanently flexible, StopGap™ prevents sound from "leaking" through small openings, effectively maintaining the Sound Transmission Class (STC) of your isolation project. It is an essential component for any recording studio, home theater, or commercial space requiring superior noise control.

• Reduces Sound Transmission: Targets and seals gaps to prevent noise leakage and enhance room isolation.

• Permanently Flexible: Formulated to stay elastic over time, preventing cracks as building materials settle or shift.

• High-Yield Coverage: Large 28 fl. oz. (825 ml) tubes are designed for efficient use on major construction projects.

• Easy Application & Clean-Up: Water-based formula allows for smooth application and simple soap-and-water cleanup.

• Safety First: Non-flammable and low-odor formula makes it safe for use in enclosed professional environments.

• Paintable: Once cured, the sealant can be painted to match your room’s aesthetic perfectly.

Details:

• Auralex® StopGap™ will achieve a Sound Transmission Class (STC) of 53 when applying it in accordance with ASTM C-919 “Standard Practice for use of Sealants in Acoustical Applications”. To achieve the 53 STC, StopGap™ should be applied as two beads of sealant at the top, bottom and all perimeter edges.

• Coverage per 28 oz. cartridge is approximately ~32 linear ft. with a 3/8 inch bead applied.