Duro-Last DL50 Membrane User Manual
Page 2
Duro-Last, “World’s Best Roof”, Duro-Guard and Duro-Bond are registered marks owned by Duro-Last, Inc.
Updated: 11/19/2013
2 of 2
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DURO-LAST 50 MIL MEMBRANE
Codes and Standards:
Underwriters Laboratories (US & Canada), FM Approvals, ICC-ES (ESR-1660), Canadian Construction
Materials Centre (CCMC 13299-L), State of Florida, Miami-Dade County, Texas Department of Insurance.
Storage:
Store rolls on their sides and on pallets. Use tarps to keep rolls dry.
Membrane Attachment:
Mechanically Fastened – DL50 membrane may be mechanically attached to a variety of roof deck and wall
materials. An appropriate slip sheet or cover board may be required. Refer to the Duro-Last Mechanically
Fastened Systems Specification for system requirements.
Duro-Bond
®
System – The Duro-Bond system (inductive weld) may be used to attach DL50 membrane. Refer
to the Duro-Last Duro-Bond System Specification for system requirements.
Adhered – DL50 membrane may be adhered to a variety of properly prepared roof decks, walls, cover boards
and insulations including Duro-Guard™ ISO products, DensDeck
®
Prime Roof Board and SECUROCK
®
Gypsum-Fiber Roof Board. Refer to the Duro-Last Adhered Systems Specification for system requirements.
Physical Properties:
DL50 membrane has been subjected to the tests required by ASTM 4434 “Standard Specification for Poly (Vinyl
Chloride) Sheet Roofing” and has been classified as a Type III, internally reinforced sheet. The results of each
test as well as typical values are listed below.
Physical Property
Test Method
ASTM 4434 Requirement
Result
Typical Value
Overall Thickness
ASTM D751
≥ 0.045 in.
PASS
50 mil, nominal
Breaking Strength
1
ASTM D751 Grab Method
≥ 200 lbf./in.
PASS
390 lbf x 438 lbf
1
Elongation
1
ASTM D751 Grab Method
≥ 15%
PASS
31% x 31%
1
Seam Strength
ASTM D 751 Grab Method
≥ 292 lbf x 328 lbf
(75% of Breaking Strength)
PASS 417
lbf
Tear Strength
1
ASTM D751 Procedure B
≥ 45 lbf.
PASS
132 lbf x 163 lbf
1
Low Temp. Bend
ASTM D2136
Must Pass at – 40
°F
PASS PASS
Heat Aging
ASTM D3045
Conditioned for 56 days in oven
maintained at 176
°F
PASS PASS
Accelerated Aging
ASTM G154
(formerly G53)
5,000 hour total test time.
Irradiance level of 0.68 W/m2-nm.
Cycle: 8 hour at 145
°F,
4 hour condensation at 122
°F
PASS PASS
Dimensional Stability
1
ASTM D1204
Conditioned for 6 hours in oven
maintained at 176
°F.
Allowable change: ≤ 0.5%
PASS
-0.30% x -0.45%
1
Water Absorption
ASTM D570
Immersed in water at 158
°F
for 168 hours.
Allowable Weight Change: ≤ 3%
PASS 1.7%
Static Puncture
ASTM D5602
≥ 33 lbf
PASS 56
lbf
Dynamic Puncture
ASTM 5635
≥ 14.7 ft-lbf (20 J)
PASS
≥ 14.7 ft-lbf
1
Typical values are shown for both machine and cross machine directions. The machine direction results are listed first.
Additional Tests
Fungi Resistance
ASTM G-21
No Sustained growth or discoloration
Moisture Vapor Transmission
ASTM E96, Proc. B, Method A
< 0.22 U.S. Perms