40 Below Flex Flashing Tape

Aggressively Sticky with 270 days UV protection

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 nail and screw 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.

Application
  • 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
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.
New Zealand Building Code Standard (NZBC)
  • 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.
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.

Technical Data

Scope of Use / Applications

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 manufactures. 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.

 

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. To contact your local Rep visit here

 

Code
Description
Roll Sizes
40FLXBELOW75x20 40 Below Flex flashing tape 75mm H 75mm x L 20m
40FLXBELOW100x20 40 Below Flex flashing tape 100mm H 100mm x L 20m
40FLXBELOW150x20 40 Below Flex flashing tape 150mm H 150mm x L 20m
40FLXBELOW230x20 40 Below Flex flashing tape 230mm H 230mm x L 20m

Available in-store at:

TRADIES: This product might not necessarily be a stocked item by your merchant however can be ordered in.

MERCHANTS: To enquire about this product or to place an order, please contact your local Mason’s rep >