40 Below

Window Flashing tape that sticks in all weather conditions

40 Below

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Description

40 Below™ Flashing Tape is a self adhesive flashing tape to seal around windows, doors, and other joinery openings as a secondary defense against water penetration.
  • Passes nail seal ability to ASTM 1970-01 per AAMA 711-07 and is suitable as a single layer application over timber frame.
  • Not suitable where screw sealability is required
  • Has been CodeMark Certified by Certmark International
  • For a risk score between 0-20 in accordance with NZBC Acceptable Solution E2/AS1
  • Passed NZS3604 Building Wind Zones up to and including ‘Extra High’
40 Below™ Flashing Tape- Advantages
  • Compatible with all building wraps
  • Incredible adhesion in all conditions
  • Simple 4 step installation, save time reducing costs
  • Extremely thin only 0.2mm, allows for easier fitting of windows and doors
  • Reliable and dependable weather tightness
  • Works in temperatures from -40°C up to 65°C
  • An Optional Corner Guard is easy to install and increases protection to framing
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Scope of Use / Applications

Windows/Door/Timber & Steel Frame Flashings

  • Masons 40 Below™ Flashing Tape and Masons Corner Guard must be installed in accordance with these instructions. Ensure the 40 Below™ Tape completely covers the joinery opening.
  • To ensure maximum adhesion of the tape, make sure the substrate surface is clean, dry and free from any dust or other contaminants. Flaps are folded into the opening and secured.
  • The building wrap is installed as shown to the exterior face of the frame. At window and door openings it is cut on a 45˚ angle away from each corner, then the flaps are folded into the opening and secured.
  • 40 Below™ Flashing Tape must not be stretched. When joining 2 sections of tape, overlap by 100mm or more.
  • Compatible with most building sealants, check suitability with sealant manufactures.Alternatively do a patch test before use.
RIGID AIR BARRIERS – 40 Below™ is tested and approved for sealing the joints on Rigid barriers. Tested and approved for use with BGC Durrabarrier and OS’BraceRAP.
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