Fischer Acoustic Sealant (Non Hardening sealant)

About Fischer Acoustic Sealant (Non Hardening sealant)

Fischer Acoustic Sealant | Non-Hardening, Fire-Resistant Sealant for Soundproofing & Joint Isolation

The Fischer Acoustic Sealant is a premium-grade, non-hardening, elastic joint sealant formulated specifically for acoustic sealing and air-gap isolation in drywall partitions, MLV joints, ceiling perimeters, and floor-wall connections. This non-curing, flexible compound remains soft over time, allowing for vibration absorption, airtightness, and sustained STC performance in high-specification acoustic builds.

Ideal for recording studios, auditoriums, home theatres, offices, and MEP penetrations, it complements acoustic panels, gypsum boards, mass loaded vinyl (MLV), and insulation materials by eliminating flanking paths and sealing minor gaps.

Key Features:

• Non-hardening and permanently flexible acoustic-grade sealant

• Prevents sound leaks, air drafts, and vibration bridging

• Remains elastic accommodates movement, expansion & vibration

• Excellent adhesion to gypsum, concrete, wood, metal, vinyl, and plastic

• Fire-resistant and moisture-resistant (as per EN/ASTM specs)

• Compatible with RSIC clips, MLV, glasswool, drywall systems

• Easy to apply with standard caulking gun no shrinkage or cracking

Applications:

• Drywall partition joints & perimeters

• Mass Loaded Vinyl (MLV) overlaps and terminations

• Wall-ceiling-floor intersections in studios & theaters

• Electrical/plumbing penetrations in acoustic assemblies

• HVAC duct-to-wall/ceiling interfaces

• Office partitions and hospital wall systems

• Recording rooms, generator enclosures, and acoustic cabins

Technical Specifications:

• Base: Synthetic rubber-based / polymerized butyl

• Texture: Smooth, non-skinning paste

• Color: Off-white / Grey / Black

• Packaging: 300ml cartridge / 600ml sausage

• Acoustic Rating: Up to 63 STC in wall systems

• Movement: 12.5% joint movement capability

• Shelf Life: 1218 months (store below 35C)

• Fire Resistance: Complies with EN 1366 / ASTM E84 Class A

• Application Temperature: +5C to +40C