Flex FB 50 PLUS - Manual

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Flex Membrane International Corp. 2670 Leiscz’s Bridge Road, Suite 400, Leesport, PA 19533
Tel: (610) 916-9500 Fax: (610) 916-9501 www.FlexRoofingSystems.com
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Product Data Sheet
FLEX FB 50 PLUS ELVALOY® ROOF SYSTEM
76”and 120” WIDE, FLEECE BACKED, REINFORCED,
THERMOPLASTIC ROOF MEMBRANE
PRODUCT DESCRIPTION
The Flex FB 50 Plus Elvaloy® Roofing Membrane is a high performance thermoplastic membrane
designed for adhered roofing applications. The Flex FB Plus is produced with Dupont Elvaloy® KEE
and is available in a thickness of 50 mils of polyester reinforced membrane plus a 5.50 oz. polyester
fleece backing. The Flex FB 50 Plus Elvaloy® Roofing Membrane is an effective choice for new or re-
roofing installations as the fleece backing allows the membrane to be installed directly over most
substrates with hot steep asphalt or Flex Substrate Adhesive.
FEATURES AND BENEFITS
The Flex FB 50 Plus Elvaloy® Roofing Membrane may be installed fully adhered to a wide range of
substrates including structural or lightweight concrete decks and various types of insulation. The Flex FB
50 Plus Elvaloy® Roofing Membrane has a high degree of resistance to exposure from harsh chemicals
and extreme environments. The Elvaloy® formulation increases the ability of the membrane to remain
flexible in temperatures well below freezing. The Flex FB 50 Plus Elvaloy® Roofing Membrane is ideal
for applications where standard roofing membranes do not perform well such as heavy industrial sites,
airports, and food service facilities. The hot air welded seams allow the membrane to be installed in
extreme low slope conditions as ponding water has no effect on the membrane. The wider sheet reduces
installation cost and increases production.
INSTALLATION
The Flex FB 50 Plus Elvaloy® Roofing Membrane may be installed adhered with either Type III or IV
hot steep asphalt or Flex Substrate Adhesive, a cold process water based asphalt emulsion adhesive. The
membrane may be installed directly over lightweight or structural concrete as well as a wide variety of
insulations. All seams of the Flex FB 50 Plus Elvaloy® Roofing Membrane are sealed by hot air welding
recognized as the strongest seam in the roofing industry. Flex has a variety of cold process roofing
component configurations that allow for fast and efficient installation in areas that are restricted to fumes
or flames such as hospitals, schools, and heavily congested city centers or hard to reach areas.
APPROVALS
The Flex FB 50 Plus Elvaloy® Roofing Membrane exceeds the requirements of ASTM D-4434 standard
for thermoplastic sheet roofing. The Flex FB Plus has been thoroughly tested by Factory Mutual and has
numerous applications meeting or exceeding Class 1-90. The Flex FB Plus has been approved for Class
A fire rating by Underwriters Laboratories. Due to the white heat reflective surface, Flex thermoplastic
membranes are approved by the EPA’s Energy Star® Program and the Cool Roof Rating Council
(CRRC).