Key Features of BISCO A2 Sound Barrier Silicone

BISCO A2 Sound Barrier Silicone is a high-performance acoustical caulk designed to reduce noise transmission through gaps and joints in walls, floors, and ceilings. Here are some of its key features:

Noise Reduction

• Formulated to achieve noise reduction ratings up to 58 STC when used according to manufacturer specifications
• Creates an airtight, flexible seal that prevents sound transmission through cracks and gaps
• Effective for sealing around electrical outlets, HVAC vents, windows, doors and more

Durability

• Remains permanently flexible to absorb vibration and expansion/contraction of substrates
• Tenacious adhesion to common building materials like wood, masonry, glass and metal
• Won’t crack, crumble or shrink over time

Mold and Mildew Resistance

• Contains antimicrobial agents to prevent mold and mildew growth
• Ideal for use in moist areas like bathrooms, basements and laundry rooms

Additional Benefits

• VOC-compliant and low odor for indoor use
• Paintable once fully cured
• Available in white or custom colors
• Meets ASTM C919, ASTM C834 standards

Typical Applications for BISCO A2

BISCO A2 can be used in both residential and commercial construction for sealing joints and gaps such as:

• Top and bottom wall plates
• Electrical, plumbing or gas line penetrations
• Window and door frames
• HVAC ductwork
• Pipes and vents
• Ceiling fixtures and recessed lighting
• Attic hatches
• Partition walls
• Drywall

It’s suitable for use on porous and non-porous substrates like:

• Concrete
• Wood
• OSB
• Vinyl
• Aluminum
• Brick
• Stucco
• Ceramic tile
• Glass

Instructions for Using BISCO A2

Using BISCO A2 properly is important to achieve optimal noise reduction and durability. Here are some tips:

• Surfaces should be clean, dry and free of old caulk, grease, dust and other contaminants
• Cut nozzle to desired bead size and puncture inner seal
• Gun sealant into gaps and joints with steady pressure, ensuring complete contact with both sides of the joint
• Tool sealant with spatula or finger within 5 minutes of application to ensure adhesion and smooth finish
• For best results, width of sealant bead should be 1/8″ minimum and 1/2″ maximum
• Allow sealant to fully cure for 7-14 days before painting or water exposure

FAQs About BISCO A2 Sound Barrier Silicone

Q: How is BISCO A2 different from ordinary caulk?

A: BISCO A2 is formulated specifically for noise reduction applications with a high-performance polymer that stays flexible and adhesive over time. Ordinary caulk is designed primarily for sealing out water and drafts.

Q: What is the best way to apply BISCO A2?

A: Use a professional-grade caulk gun to control the bead size and application pressure. Make sure the nozzle opening matches the desired bead width. Apply steady pressure with the gun perpendicular to the joint to get full contact.

Q: Can I apply BISCO A2 in cold weather?

A: Yes, but cure time may be slower below 55°F. Make sure surfaces are frost-free before application. Avoid any water contact until fully cured.

Q: Is BISCO A2 paintable when cured?

A: Yes, BISCO A2 can be painted once it has fully cured, typically 7-14 days after application. Make sure the sealant is thoroughly dry first.

Q: What’s the shelf life of BISCO A2?

A: When stored unopened in a cool, dry location, BISCO A2 has a shelf life of 12 months. Always follow the use-by date printed on the packaging.