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RCS20 Acoustical Sealant

Seal out sounds. Paintable performance.

Dampen sounds and create an airtight, watertight and weatherproof seal that lasts for decades, with GE Silicones RCS20 Acoustical sealant.

RCS20 Acoustical sealant effectively seals out airborne sound in walls, doors, ceilings, and floors. Suitable for inside and outside use, it can also dampen sound in wall systems, filling in cracks, joints and cutouts that transmit noise.

Applying easily without a primer, RCS20 offers easy clean up is simple with just soap and water. It’s paintable, too, so it can be blended into virtually any environment.

RCS20 Acoustical sealant securely bonds without a primer to conventional substrates and finishes including wood, metal, plaster, masonry, drywall, glass, and ceramic tile. It can also patch non-structural cracks and joints on common substrates such as stucco, precast concrete, concrete block, and brick (some applications may require a primer).

RCS20 Acoustical sealant is backed by world-class technical support from an expert team.

  • Inhibited sound transmission
  • Hybrid formula
  • One-part, neutral cure sealant
  • Paintable
  • Primerless adhesion
Performance

Special properties and benefits

  • Reduced sound transmission in wall systems
  • Paintable with latex and oil-based paints

Exceptional durability

  • Excellent color stability and resistance to UV rays and natural weathering
  • Once cured, remains elastic and stable in temperatures from -10°F (-23°C) to 180°F (82°C)
  • Mildew growth resistance
  • Sustained airtight seal

Quick and easy to apply

  • One-part system
  • Secure adhesion without a primer
  • Hybrid manufacturing process to help eliminate air voids and ensure smooth, consistent application
  • Low-sag formula that remains in place until fully cured
  • Will not stain or discolor substrate surfaces
  • Easy soap and water cleanup

Environmentally friendly

Low VOC (volatile organic compound).

Product Video
Finishes

Currently available in two standard colors:

White
Translucent
Available Sizes

Current product volume

  • 10.1 fl oz (200 ml) plastic caulking cartridge
  • 5 gallon (19 L) plastic pail

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Product Warranty

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