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40 Below Flex Flashing Tape
Description

Our most advanced, high-performance flashing tape with cutting edge adhesive and a superior flexible facer. 40 Below Flex is ultra-thin and pliable with high water resistance and maximum UV protection. It is a nail and screws sealable with just one layer. May also be used on UNI and UNI FR for seam overlaps and head flashings and can also be used on HT Green.

Key Features
  • Super-premium white facer
  • UV resistant for 270 days
  • Advanced, aggressive acrylic adhesive for superb performance
  • Ultra-thin and pliable, so no build-up in corners
  • Nail and screw sealable with one layer
Physical Properties
  • White facer
  • Works in temperatures from -10°C up to 40°C
  • Compatible with all building wraps
  • Compatible with most building sealants – check suitability with sealant manufactures. Alternatively, do a patch test before use
  • UV resistance for up to 270 days
  • Layers on sill for nail and screw sealability: 1
  • Codemark certified
Scope of Use

Windows/Door/Timber & Steel Frame Flashings

Masons 40 Below™ Flex Flashing Tape and Masons Corner Guards must be installed in accordance with the installation instructions downloadable from this page. Please also note:

  • Ensure the 40 Below Flex 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. A window and door openings are cut at a 45˚ angle away from each corner, then the flaps are folded into the opening and secured
  • 40 Below™ Flex 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 manufacturers. Alternatively, do a patch test before use.

Rigid Air Barriers

  • 40 Below Flex is tested and approved for sealing the joints on Rigid Barriers. Tested and approved for use with BGC Durrabarrier and OS’BraceRAP
Limitations on Use
  • Compatible with most building sealants – check suitability with sealant manufactures. Alternatively, do a patch test before use
Statement of Building Code Compliance

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

  • For a risk score between 0-20 in accordance with NZBC Acceptable Solution E2/AS1 - PASS
  • B2 Durability, E2 External Moisture, and F2 Hazardous Materials. Reliable adhesion -10˚C to +40˚C
  • NZS3604 Building Wind Zones up to and including ‘Extra High’ AS/NZS 4201.4:1994
  • Tested to ASTM D3330 for adhesion and AAMA-711.5.21 for nail and screw sealability.
In-Service History

Masons Building Products has been in the industry for over 20 years. Customer satisfaction is paramount. A dedicated team of Masons Representatives cover NZ nationwide to assist and instruct customers in using Masons products.

CodeMark
CodeMark
Documents
CodeMark Certificate CM70075

CM70075 April 2021

Maintenance and Warranty
Installation and Operation

2022

Brochure
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Since being established in 1999, Masons has become a key supplier in the New Zealand building industry, offering a variety of quality products and tools for a whole range of building requirements.

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