Duro-Last DL40 Membrane User Manual
Page 2
Duro-Last, “World’s Best Roof”, Duro-Bond and Duro-Guard are registered marks owned by Duro-Last, Inc.
Updated: 11/19/2013
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DURO-LAST
®
40 MIL MEMBRANE
Codes and Standards:
Underwriters Laboratories (US & Canada), FM Approvals, ICC-ES (ESR-1660), 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 – DL40 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 DL40 membrane. Refer
to the Duro-Last Duro-Bond System Specification for system requirements.
Adhered – DL40 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:
DL40 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 IV, internally reinforced sheet. The results of each
test are listed below.
Physical Property
Test Method
ASTM 4434 Requirement
Result
Typical Value
Overall Thickness
ASTM D751
≥ 0.036 in.
PASS
40 mil, nominal
Breaking Strength
1
ASTM D751 Grab Method
≥ 275 lbf./in.
PASS
355 lbf x 441 lbf
1
Elongation
1
ASTM D751 Grab Method
≥ 25%
PASS 28%
x
31%
1
Seam Strength
ASTM D 751 Grab Method
≥ 330 lbf
(75% of Breaking Strength)
PASS 360
lbf
Tear Strength
1
ASTM D751 Procedure B
≥ 90 lbf.
PASS
125 lbf x 136 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
-0.45% x -0.40%
1
Water Absorption
ASTM D570
Immersed in water at 158
°F
for 168 hours.
Allowable Weight Change: ≤ 3%
PASS 2.6%
Static Puncture
ASTM D5602
≥ 33 lbf
PASS 56
lbf
Dynamic Puncture
ASTM 5635
≥ 14.7 ft-lbf (20 J)
PASS
≥ 14.7 ft-lbf (20 J)
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