Prosoco SS ThruWall

SS ThruWall is a stainless steel fabric flashing available in two forms – one for standard use and one for coastal regions. Both versions are bonded on one side to a layer of polymeric fabric. Designed for use with cavity wall, masonry veneer construction, SS ThruWall is compatible with other R-Guard building envelope products. Use SS ThruWall as part of a building-wide R-Guard air barrier system.

SS ThruWall | Flexible Stainless Steel Flashing for Masonry Veneer

SS ThruWall is a durable, stainless steel fabric flashing bonded to a polymeric fabric for use in cavity wall and masonry veneer construction. Designed as part of the R-Guard building envelope system, this product ensures compatibility with air barrier components while delivering superior performance in both standard and coastal environments. SS ThruWall is made from 60% recycled materials and offers excellent strength, flexibility, and chemical resistance, making it a sustainable and high-performance choice for modern buildings.

Product Description

This flexible transition material provides unmatched puncture and tensile strength, while being easy to cut and install by hand. It is non-staining and compatible with limestone and other sensitive substrates. With Class A fire resistance (ASTM E84) and mold resistance (ASTM D3273), SS ThruWall is designed to meet the demands of high-performance commercial wall systems, including those exposed to harsh coastal conditions where salt resistance is critical. It can be installed using termination bars, sealant lips, or drip edges, and it supports long-term durability in temperature-variable environments.

Key Benefits of SS ThruWall

  • Made with 60% recycled stainless steel and fully recyclable
  • Compatible with limestone – non-staining formulation
  • Fire-resistant (Class A rated)
  • Superior puncture and tensile strength
  • Flexible and easy to cut or shape by hand
  • Mold-resistant and suitable for high-temp applications
  • Coastal version available with salt corrosion resistance

Common Applications

  • Cavity walls and masonry veneer systems
  • Standard and coastal transition joints
  • Window openings, end dams, inside and outside corners

Storage & Packaging

Available in 60-ft rolls (12″, 18″, 24″, or 36″ widths). Compatible accessories include End Dam, Inside/Outside Corners, T-96 Termination Bars, Drip Edge, and Weep Vents.

Product Properties

Property Value
Form Stainless steel sheet with polypropylene coating, silver/gray color
VOC Content Not applicable
PH Not applicable
Freeze Point Not applicable
Flash Point Not applicable
Total Solids Not applicable
Coverage Rate Not applicable
Shelf Life Not applicable
WT/GAL Not applicable
Available Sizes 12″, 18″, 24″, 36″ x 60-ft rolls; plus accessories: end dam, corners, termination bar, drip edge

Also see Thru-Wall Flashing for a primerless, UV-resistant alternative. Visit PROSOCO for more R-Guard solutions.