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Z-Flex Tape

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Product Description
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Z-Flex Tape ™ is a flexible flashing tape to form into a transition at the top of the foundation insulation. Manufactured with a high strength facer, this tape can handle sizable building movement without loss of performance. Designed to be a 100% air and moisture barrier, Z-Flex peel and stick tape offers an easy to install z-channel detail without all the heavy equipment. This high performance tape will adhere in extreme cold and wet weather due to having MicroGrab™ Adhesive Technology.

Compatible with EPS, XPS and other foundation insulations.
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Basic Uses
Location of transition that need a peel and stick weather barrier that is waterproof.

No Caulk, No Metal - Just Waterproof

Since the adoption of the new Energy Building Codes, builders are required to install more insulation on the foundations. This has led to several issues with the insulation itself. One of the biggest issues is how to waterproof and protect the top of the insulation board.
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Protecting the top cut of foundation is very critical as moisture can enter into the board at this location. EPS and XPS are closed cell but can be vulnerable to moisture absorption at the top. Polyiso are even more vulnerable to water infiltration. Having a protective barrier at the top of these is extremely critical. Z-Flex Tape solves the problem.

Stopping the water from getting against a non-treated foundation is imperative. Moisture can migrate throughout the footing-foundation interface and create other issues. The Z-Flex Tape is an easy and effective way to manage the moisture. One considerable advantage in using Z-Flex Tape is to have a thermal break as compared to a metal flashing and all the difficulty/weakness of with installing metal and caulk.

Monolithic Waterproof Z Flashing

• Eliminates Thermal Transfer
• Helps Eliminate Cracks and Heaving
• Adheres in Cold Weather -30ºF
• Helps Maintain Water Drainage
• Backfill Durable Membrane
• Provides Full Capillary Break
• Stops Infiltration of Soil Gasses
• Helps Prevent Wall Failure
• Available in 3 Widths
• Workable for Precise Placement
• Thin Design for Better Formability
• No Heated Storage Required
• Conforms to Surfaces Irregularities
• Compatible with Most Building Materials
• Helps Stop Mold and Mildew
• No VOCs and Environmentally Friendly
• Micro-Grab Adhesive Technology
• Works on Wood Foundations as Well
• Limited Lifetime Warranty
• Made in USA

Available Sizes


4" x 75'

6" x 75'

9" x 75'













Customizable Sizes Available

We believe that Xtreme Weather Flashing tape is the best on the market. We believe it is better than all others flashing tapes including 3M 8067, DuPont Tyvek Tape, Nashua Select, Protecto Super Stick, Grace Vycor Plus, Protecto Wrap Bt-25XI, Henkel OSI TeQ Flash, Windowwrap PSX-20, MFM WindowWrap PowerBond, Henry Blueskin WB, barricade Ulti-Flash, Mpn 45804, Nashua Optiflash, Polyguard, York RESHS09, Shadowlastic, Baricade, Aquaseal Hyband, Adchem DrainFlash and Typar Flashing.