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BA650 BlastPutty Acoustic Putty Pads
STC 62+ Acoustic Putty Pads for Electrical Boxes
BA650 BlastPutty is a flexible soundproofing putty pad for wrapping electrical outlets and through-penetrations in acoustic assemblies. STC 62+ rating (ASTM C919 & E90 tested). Self-adhering with release paper for easy installation.
The weakest link in any soundproofing system is the penetration — the electrical outlet, switch box, pipe chase, or cable opening that creates a direct air path through an otherwise complete acoustic barrier. A standard electrical outlet box installed back-to-back with the box in the adjacent room can reduce the STC of an STC 50 wall to effectively STC 30 or below. BA650 BlastPutty Pads solve this problem completely. The self-adhering putty wraps around electrical boxes and outlet penetrations, sealing all gaps between the box and the acoustic assembly. The material is flexible and easy to mold around any box shape, ensuring complete coverage with no gaps. ASTM C919 and E90 testing confirms STC 62+ performance — higher than most wall assemblies, meaning the putty pads are never the weakest link. Where the penetration sits in a fire-rated assembly, the firestopping must be specified separately against the requirements of that assembly — BlastBlock publishes no third-party fire-stop data for BA650.
Technical Specifications
- STC Rating: At least STC 62 (ASTM C919 & E90)
- Size: 18cm × 18cm × 0.3cm
- Application: Self-adhering — peel and apply
Features & Performance
- STC 62+ — never the weakest link in your acoustic assembly
- Self-adhering — no separate adhesive required
- Flexible — molds to any electrical box shape
- Compatible with standard single and double gang boxes
- ASTM C919 and E90 independently tested
Applications
Frequently Asked Questions
Why do I need acoustic putty pads if I already have MLV on my walls?
Electrical boxes and outlets create direct penetrations through the wall that bypass your MLV barrier. Sound travels through air gaps around outlet boxes just as easily as through an open hole. Without acoustic putty pads, the STC performance of your entire wall assembly is compromised at every outlet location. BA650 putty pads maintain the STC rating at these critical points, ensuring your complete wall assembly performs as designed.
Can BA650 putty pads be used in fire-rated wall assemblies?
BA650 is an acoustic putty pad, tested to ASTM C919 and E90. In a fire-rated assembly the electrical penetration must also be firestopped to a system suited to that assembly, and BlastBlock publishes no third-party fire-stop data for BA650 — specify a listed firestop product for the fire requirement and BA650 for the acoustic seal.
How are BA650 putty pads installed?
Installation is straightforward. Remove the release paper from both sides of the BA650 pad. Wrap the pad around the electrical box before it is installed in the wall, or mold it around the box after installation. Press firmly to ensure full contact. The self-adhesive properties hold the pad in place during wall closure. No special tools are required. Installation typically takes under two minutes per outlet.
Other BlastBlock Products
- BB830 Acoustic Optimized MLV — The Original Acoustic Optimized Mass Loaded Vinyl — STC 32 dB
- BB830FR Fire-Rated Acoustic MLV — Fire-Rated Acoustic MLV with ASTM Test Reports — STC 32 dB
- BB830LF Heavy-Duty Low Frequency MLV — Heavy-Duty Low Frequency Sound Insulation — Rw 32 dB, 10 kg/m²
- BB460 Sound and Vibration Proofing Material — Dual-Function: Sound Blocking + Vibration Dampening