40Below™ Flashing Tape is a self adhesive flashing tape to seal around windows, doors, and other joinery openings as a secondary defense against water penetration.

Application

• Incredible adhesion in all conditions.
• Simple 4 step installation. Save time reducing costs.
• Reliable and dependable weather tightness.
• An Optional Corner Guard is easy to install and increases protection to framing.
• RIGID AIR BARRIERS – 40Below is tested and approved for sealing the joints on Rigid Barriers. Tested and approved for use by: BGC Durabarrier and OS’BraceRAP.

NB. Masons 40Below Flashing Tape and Masons Corner Guards must be installed in accordance with the installation instructions found in our Document Downloads button .

New Zealand Building Code Standard (NZBC)

• 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’.
• Passes nail seal ability to ASTM 1970-01 section 7.9.
• New smooth white facer tape also passes screw sealablity to AAMA 711-13.
• Suitable as a single layer application over timber frame

Physical Properties

• Extremely thin only 0.2mm, allows for easier fitting of windows and doors.
• Works in temperatures from -40°C up to 65°C.
• Compatible with most building wraps.
• Compatible with most building sealants – check suitability with sealant manufactures. Alternatively do a patch test before use.

Technical Data

Scope of Use / Applications

Windows/Door/Timber & Steel Frame Flashings

• Masons 40Below™ Flashing Tape and Masons Corner Guards must be installed in accordance with these instructions. Ensure the 40Below™ 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.
• 40Below™ 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 – 40Below™ is tested and approved for sealing the joints on Rigid Barriers. Tested and approved for use with BGC Durrabarrier and OS’BraceRAP.