Sealtite Airstop FR  is a flexible, compressible, open cell polyurethane foam with at least 80% open cell structure. Material is designed to provide sound control characteristics in a wide range of applications. Sealtite Airstop FR is ideal for use as an air infiltration barrier in stationary or moving joints, such as those in curtain wall to masonry studs plates to concrete slabs. Material can be coated with a neoprene coating for use in high wear or exposed applications. Sound joints with 100% movement capability may be constructed by gluing Sealtite Airstop to both side walls of a joint.

Typical Applications
Generally used for filling, sealing, and insulating of joints, cracks, and cavities. Examples include the following:

• Structural space between window and door frames
• Seams between chimneys, roof protection, roof panels, and wall panels
• Through penetrations around cables and pipes
• Air Sealing

Performance

Elongation must be at least 325% with a tensile strength of not less than 53 psi. Material must provide a minimum of 25 dB reduction in noise and transference. Material must be compressible to 10% of original thickness when compressed in one dimension. Must not bleed, stain, or degrade beyond use under exposure to 10-year ultraviolet simulation by Weatherometer. (ASTM G53)

Installation

Joint faces shall be smooth and free of loose debris prior to application of Sealtite AirStop. Material shall be a minimum of two times the width of the predicted maximum joint opening. When used in conjunction with adhesive, Sealtite Flexible Seal or Gel-Loc 25 is required. When used as a waterstop in conjunction with polyurethane grout, consult the respective manufacturer for installation procedures.