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DURO-GUARD SECUROCK GYPSUM-FIBER

5/8-INCH ROOF BOARD

Description:
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Duro-Guard Securock Gypsum-Fiber Roof Board is
a high-performance roof board for use in low-slope
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Duro-Last roofing systems. The unique, fiber-
reinforced, homogenous composition gives the panel
strength and water resistance through to the core.
Securock Gypsum-Fiber Roof Board provides
exceptional bond and low absorption in adhered
systems and with its homogenous composition
achieves high wind-uplift ratings with no risk of facer
delamination. Made from 97% recycled material,
Securock Gypsum-Fiber Roof Board combines
superior performance with sustainable design for all Flat Panels:
types of Duro-Last roofing systems.
 Available sizes:
 Engineered to provide superior wind-uplift
performance for a wide variety of roof o 4 ft. x 8 ft.
assemblies. Securock Gypsum-Fiber Roof o 4 ft. x 4 ft.
Board has uniform composition providing
enhanced bond strength with no risk of facer o Thickness: 5/8 inch.
delamination.
 Provides excellent fire performance and
demonstrates exceptional surface burning TABLE 1. PHYSICAL PROPERTIES
characteristics (ASTM E84 (CAN/ULC-S102)
Flame Spread 5, Smoke Developed 0). Flexural Strength, ASTM C 473 161 lbs. min.
Parallel
 Uniform water-resistant core ensures excellent
moisture and mold resistance. Scored a Flute Spanability ASTM E 661 10 inches
maximum "10" for mold resistance on ASTM
D3273. Permeance ASTM E 96 24 perms
 Easy to cut, handle and install. R Value ASTM C 518 0.6 ft ·°F·hr/btu
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 Recycled content > 97%. Coefficient Of 8.0 x 10
-6
Thermal Expansion ASTM E 831 inches/inch·°F
 Refer to Table 1 for physical properties.
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Linear Variation With 8.0 x 10
Change In Moisture ASTM D 1037 inches/inch·%RH
Recommended Uses:
 Adhered/Fully Bonded Duro-Last roof systems. Water Absorption ASTM C 473 10% max.
 Metal retrofit roof systems with Adhered/Fully Surface Water ASTM C 473 1.6 grams
Bonded Duro-Last roof systems. Absorption
Mold Resistance ASTM D 3273 10
Underwriters Laboratories, Inc. Classifications:
Compressive
 Refer to Duro-Last’s UL Listings Strength 1,800 psi
(TGFU.R10128) for assembly details.
Bending Radius 30 ft.
Factory Mutual Approvals:
Weight 3.20 lbs./sq. ft.
 FM 4450, FM 4470.
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 Refer to FM Approval’s RoofNav for details on
FM Approved systems (www.roofnav.com).
www.duro-last.com 1 of 2 800-248-0280
Duro-Last, Duro-Guard, Duro-Grip, Duro-Bond and “World’s Best Roof” are registered marks owned by Duro-Last, Inc. Weather-Tite is a registered mark owned by Millenium Adhesive Company.
Securock is a registered mark owned by USG Corporation. RoofNav is a registered mark owned by FM Global. Olybond500 is a registered mark owned by OMG, Inc.
Created: 01/12/2015 Revised: 05/07/2015