Flex FB 100 PLUS User Manual
Product Data Sheet
FLEX FB 100 PLUS ELVALOY® ROOF SYSTEM
(76”and 120” Wide, Reinforced, Thermoplastic Roof Membrane)
PRODUCT DESCRIPTION
The Flex FB 100 Plus Elvaloy® Roofing Membrane is a high performance thermoplastic membrane
designed for adhered roofing applications. The Flex FB 100 Plus is produced with Dupont Elvaloy®
KEE at a thickness of 100 mils of polyester reinforced membrane plus a 5.50 oz. polyester fleece backing.
The Flex FB 100 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 wider sheet reduces installation cost and increases production.
· May be installed fully adhered to a wide range of substrates including structural or lightweight
concrete decks and various types of insulation.
· 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.
· 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.
INSTALLATION
The Flex FB 100 Plus Elvaloy® Roofing Membrane may be installed fully 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 100 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 100 Plus Elvaloy® Roofing Membrane exceeds the requirements of ASTM D4434 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).
_____________________________________________________________________________________________________
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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PHYSICAL PROPERTIES
Property Test Procedure Specification
Color White, Gray, Tan
Thickness ASTM D751 .100”
Breaking Strength (lbf) ASTM D751 325 x 324
Tear Strength (lbf) ASTM D751 89 x 109
Seam Strength (lbf) ASTM D751 295
Elongation ASTM D751 50% x 42%
Heat Aging ASTM D3045 > 90 %
Low Temp. Bend ASTM D2136 Pass (-40°F)
Static Puncture Resistance ASTM D5602 Pass
Dynamic Puncture Resistance ASTM D5635 Pass
Permeance ASTM E96 0.003 Perms
Dimensional Stability ASTM D1204 0.3 %
Weight change after
Water Immersion ASTM D570 1.20 %
Accelerated Weathering ASTM G155 Pass
Fungi Resistance ASTM G-21 No Growth
Solar Reflectivity ASTM C1549 .82 (white)
Emissivity ASTM C1371 .91 (white)
SRI ASTM E-1980 109 (white)
Flex FB 100 Plus Elvaloy® Roofing Membranes are thermoplastic in nature and exceed the requirements
of ASTM D4434 standard specifications for poly (vinyl chloride) based sheet roofing.
WARRANTY
The Flex FB 100 Plus Elvaloy® Roofing Membrane may receive the manufacturer’s standard five (5)
year or optional ten (10) year, fifteen (15) year, twenty (20) year, twenty-five (25) year or thirty (30) year
guarantee of watertightness.
Elvaloy® is a registered trademark of DuPont.
_____________________________________________________________________________________________________
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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