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SIGA Majvest 500 SA Self-Adhering Permeable Membrane

SKU 8920-046030
Original price $259.75 - Original price $869.30
Original price
$259.75 - $869.30
Current price $259.75
in stock
in stock

Save 10% on select products with backtoschool at Checkout. Brand and product exclusions apply.

SIGA's Majvest 500 SA is a self-adhering, vapor-permeable membrane with the reverse face coated by pressure-sensitive glue for direct bonding to substrates.

Majvest 500 SA allows you to skip the primer since it sticks to most common building materials, including concrete, plywood, gypsum and metal without primer - even in cold applications.

What's Included

Majvest 500 SA comes in two sizes:

  • 18 inches wide, 100ft long (covers 150 sqft)
  • 60 inches wide, 100ft long (covers 500 sqft)

Delivery time / Order Processing & Shipping Times

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More about this product (provided by the manufacturer)

SIGA Majvest 500 SA is a fully-adhered 3-ply, microporous membrane, designed for use as a long-lasting water-resistive barrier (WRB) and air-barrier (AB) component in commercial and residential buildings. Primer-free adhesion to most common building materials, including concrete, plywood, gypsum, and metal. Reliably sticky in cold temperatures thanks to SIGA’s proprietary acrylic adhesive technology. For above-grade wall applications.


Roll Dimensions: 60” x100’ 18” x100’ 

Thickness: 28 mils 

Maximum UV Exposure: (IECC Climate Zones 3-8) 6 months 

Water Vapor Transmission: (ASTM E96 Method A / Dry-Cup) 16 US perms

Minimum Recommended Installation Temperature: 14°F (-10°C)

Documentation and Tear Sheets


10-Year Limited Warranty from SIGA


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