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The GreenWeld™ PVB armored flashing system is a high-performance PVB (PolyVinyl Butyral) membrane enhanced with an aluminum scrim for superior flexibility, strength and weathering. The membrane is comprised of recycled PVB in the monolithic membrane, which can be heat-welded to itself at the seams.

The flashing is designed as a replacement for lead, sealant pockets or liquid flashing systems were the cap flashing ply is the GreenWeld PVB membrane. It can be used in both residential and commercial roofing applications. In commercial (flat roofing) applications, the membrane is used in conjunction with an approved 2-ply modified bitumen system, single-ply or a target patch base sheet to form a complete flashing system.

Some applications require GreenWeld Adhesive/Sealant, a single component, polyether structural adhesive designed for difficult bonding and sealing applications. GreenWeld Adhesive/Sealant is VOC compliant, strong and flexible, offers low temperature flexibility, and experiences no slump. Please refer to the Installation Instructions below for application usage.

GreenWeld Advantages

  • 20-year warranty

  • Heat-weldable and easy to use

  • Easy to cut and mold to irregular shapes

  • Lead-free, non-toxic and sustainable

  • Flexible and light weight

  • Long roll lengths (19.5' ft.) in pre-packaged rolls

  • Custom flashing options such as pre-formed boots

  • Significantly less expensive and labor savings versus liquid flashing systems

GreenWeld Applications

  • Flashing material for pipe penetrations and support beams

  • Water barrier for cavity walls and beneath casings

  • Connection between outside walls and extensions

  • Liner for gutters

  • Protection for ridges on sloped roofs

  • Liner for valleys of shingles, tile and aluminum metal roofing systems

  • Joint between dormers and skylights to side walls and tiled roofs

  • Through wall flashing applications

For availability, pricing or more information, please contact MFM Customer Service at 800-882-8663 or via email.


GreenWeld™ PVB

ProductProduct IDSizeUnits/CartonRoll Wt.
GreenWeld Flashing7003939” x 19.5’Sold by the Roll55 lbs (RL)
7002020” x 19.5’Sold by the Roll28 lbs (RL)
7001010” x 19.5’Sold by the Roll14 lbs (RL)
GreenWeld Sealant7090010 Oz Tube30 Tubes36 lbs (CTN)