BA890 Sealant
Acoustic Sound Sealant
BA890 BlastSealant is a permanent, flexible sealant designed specifically for acoustic insulation. It seals gaps and joints in walls, floors, ceilings, doors, and windows to maintain Sound Transmission Class (STC) ratings. Non-flammable and suitable for fire-rated systems.
Stocked in Bangkok and sold online in Thailand by IAC Acoustics (Thailand). Outside Thailand, request a quote.
- Permanent flexible dense sealant
- Designed for acoustic insulation
- Non-flammable for fire-rated systems
- Easy application and cleanup
- Low VOC: 28 g/l
- Full cure 2-3mm per 24 hours
- Artificial weathering resistant
About BA890 Sealant: Engineered for Acoustic Excellence
The most carefully installed soundproofing system will fail if gaps and joints aren't properly sealed. Sound travels through any available path, and even small openings can create significant acoustic leaks that undermine your entire installation. BA890 BlastSealant is specifically formulated to maintain Sound Transmission Class (STC) ratings at these critical points.
BA890 is a permanent, flexible, dense sealant designed for acoustic insulation applications. Unlike general-purpose caulks that can shrink, crack, or lose adhesion over time, BA890 maintains its acoustic sealing properties throughout the life of your installation.
The dense formula is key to acoustic performance. Standard silicone and latex caulks have relatively low mass and don't effectively block sound transmission. BA890's dense, permanent formulation provides actual sound blocking at joints, penetrations, and transitions - not just air sealing.
BA890's non-flammable properties make it suitable for fire-rated systems and general construction safety requirements. This is important for commercial buildings, healthcare facilities, and any application where fire codes apply.
The low VOC formula (28 g/l) meets stringent indoor air quality requirements for occupied buildings. Schools, hospitals, hotels, and residential applications benefit from BA890's minimal off-gassing during and after installation.
Application and cleanup are easy with standard caulking tools. BA890 cures at approximately 2-3mm depth per 24 hours, with full cure achieved in 72 hours. The artificial weathering resistance makes BA890 suitable for exterior and exposed applications.
For professional soundproofing installations, BA890 is an essential finishing product. Acoustic consultants and contractors know that proper edge sealing often makes the difference between a successful installation and a disappointing one.
BA890 Sealant Application Guidelines
- 1Ensure surfaces are clean, dry, and free of dust and contaminants.
- 2Cut nozzle tip at 45° angle for optimal bead size (typically 6-8mm).
- 3Apply continuous bead along all joints, edges, and transitions.
- 4Tool within 10 minutes of application for smooth finish.
- 5For deep joints, apply in layers allowing cure between coats.
- 6Seal all electrical outlet perimeters and penetration edges.
- 7Address wall-ceiling and wall-floor transitions completely.
- 8Allow 72 hours for full cure before testing or final inspection.
- 9Clean tools immediately with water before sealant cures.
Technical Advantages
- Dense permanent formula provides actual sound blocking, not just air sealing
- Designed specifically for acoustic insulation applications
- Non-flammable for fire-rated systems and construction safety
- Low VOC (28 g/l) meets indoor air quality requirements
- Artificial weathering resistant for exterior and marine applications
- Water resistant after cure
- Easy application with standard caulking tools
- 72-hour full cure maintains long-term performance
How it is installed
Illustrative details, not to scale. No acoustic performance is implied by a drawing; follow the installation guide for the full steps.
Bonding BlastBlock to a concrete wall
Adhesive holds the sheet, screws take the weight, sealant closes the gaps.
Read the full method
Lagging a drain pipe
Soft wool against the pipe, BlastBlock outside, sealed at both ends.
Read the full methodCommon Use Cases for BA890 Sealant
Seal all edges of BlastBlock MLV installations to prevent sound leaks around the perimeter. Critical for achieving rated STC performance.
Seal around pipes, ducts, conduit, and other penetrations through soundproofed walls. Even small gaps create significant acoustic leaks.
Seal gaps around door frames and window frames to complete the acoustic envelope. Often the difference between good and excellent sound isolation.
Critical junctions where different assemblies meet require complete sealing to prevent flanking sound transmission.
BA890's water resistance makes it suitable for yacht and boat installations where moisture exposure is unavoidable.
BA890 Sealant vs. Conventional Soundproofing
| Feature | BlastBlock BA890 Sealant | Conventional Products |
|---|---|---|
| Acoustic Design | Formulated for sound blocking | General purpose |
| Density | Dense formula for mass effect | Standard density |
| Flexibility | Permanent flexibility | May crack or shrink |
| VOC Content | 28 g/l low VOC | Often higher VOC |
| Weather Resistance | Artificial weathering tested | May degrade outdoors |
Frequently Asked Questions
Industry Benefits
Acoustic Consultants
Specified acoustic sealant ensures designed STC ratings are achieved
Soundproofing Contractors
Professional finishing product that delivers measurable results
General Contractors
Low VOC formula meets commercial building air quality requirements
Marine Installers
Weather and water resistant formula for yacht applications
Home Builders
Quality acoustic sealing differentiates premium construction
Buy BA890 Sealant in Thailand
BA890 Sealant is stocked in Bangkok and sold online, with prices in Thai baht, by IAC Acoustics (Thailand) Co., Ltd. — the authorised distributor for Thailand. Delivery nationwide, or collect from the Bangkok warehouse by appointment. Thai-language product pages and buying guides are available on the same site.
