Flex MF-R 72 PVC User Manual
Product Data Sheet
FLEX MF/R 72 PVC ROOF SYSTEM
(60”, 78” and 120” Wide, Reinforced, Thermoplastic Roof Membrane)
PRODUCT DESCRIPTION
The Flex MF/R 72 PVC (polyvinyl chloride) Roofing Membrane is a high-performance thermoplastic
membrane designed for mechanically attached or adhered roofing applications. The Flex MF/R 72 PVC
is produced with high grade polyvinyl chloride resins into a polyester reinforced roofing membrane with
built in chemical, UV and fire resistance. The Flex MF/R 72 PVC white membrane results in a highly
reflective, low maintenance roof surface that saves the Building Owner energy and labor costs and helps
reduce pollution in the surrounding environment.
FEATURES AND BENEFITS
· 120” wide membrane saves in labor costs for installation - 20% less seams to weld.
· 120” wide membrane saves in material costs - 20% less fasteners and plates.
· Hot air welded seams are the strongest, most reliable seams in the roofing industry.
· Chemical, Ozone and UV exposure do not affect surface pliability or functional integrity.
· Energy Saving Reflective Roof Surface is more in demand than ever before.
· Effectively tested to perform in high wind situations - meets or exceeds FM Class 1-90 wind uplift
requirements.
· Increased cold weather flexibility allows installation in below freezing temperatures.
· Available in White, Gray and Tan colors.
MECHANICALLY ATTACHED INSTALLATIONS
The Flex MF/R 72 PVC membrane is ideal for use as a mechanically attached membrane for new
construction and re-roofing. Flex’s MF/R 72 PVC membrane is lightweight, just a few ounces per square
foot, making it ideal for re-roofing projects where a tear off can be avoided. Flex has several fastener and
plate options available to meet a wide range of wind uplift pressure requirements.
ADHERED INSTALLATIONS
The Flex MF/R 72 PVC Roofing Membrane can be installed with Flex’s Bonding Adhesive for a fully
adhered installation. This system is ideal for installations with unusual or odd shaped contours. Fully
adhered installations are the answer for design limitations on mechanical penetrations of the deck or for
situations where increased wind uplift pressure requirements must be met.
APPROVALS
The Flex MF/R 72 PVC Roofing Membrane exceeds the requirements of ASTM D4434 standard for poly
(vinyl chloride) thermoplastic sheet roofing. The Flex MF/R 72 PVC Roofing Membrane meets and
exceeds Factory Mutual's 1-90 wind uplift requirements in numerous adhered and mechanically attached
roof applications and meets Underwriters Laboratories Class A fire rating.
Flex Membrane International Corp. 2670 Leiscz’s Bridge Road, Suite 400, Leesport, PA 19533
Tel: (610) 916-9720 Fax: (610) 916-9721 www.FlexRoofingSystems.com
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PHYSICAL PROPERTIES
Property Test Procedure Specification
Color White , Gray, Tan
Thickness ASTM D751 .072” nominal
Roll Size 60” x 80’
78” x 80’
120” x 80’
Breaking Strength ASTM D751 256 x 242
(minimum, lbf/in.)
Seam Strength ASTM D751 297 lbf
Elongation @ Break ASTM D751 57% x 54%
Heat Aging ASTM D3045 >90%
Tear Strength min. lbf. ASTM D751 99 x 70
Low Temperature Bend ASTM D2136 PASS (-40ºF)
Static Puncture Resistance ASTM D5602 PASS @ 33 lbs.
Dynamic Puncture Resistance ASTM D5635 PASS @ 20 J
Dimensional Change ASTM D-1204 0.25%
(maximum %) (@ 176º F, 6 hours)
Water Immersion ASTM D-570 1.96%
Accelerated Weathering ASTM G-155 PASS
Solar Reflectivity ASTM C1549 .82 (white)
Emissivity ASTM C1371 .91 (white)
SRI ASTM E1980 109
Flex MF/R PVC membrane is thermoplastic in nature and exceeds the requirements of ASTM D4434
standard specification for poly (vinyl chloride) sheet roofing.
WARRANTY
The Flex MF/R 72 PVC Roofing Membrane may receive the manufacturer's standard five (5) year, ten
(10) year, fifteen (15) year or twenty (20) year guarantee of watertightness.
Flex Membrane International Corp. 2670 Leiscz’s Bridge Road, Suite 400, Leesport, PA 19533
Tel: (610) 916-9720 Fax: (610) 916-9721 www.FlexRoofingSystems.com
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