ASTM D4811/D4811M-16(2023)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation:D4811/D4811M −16 (Reapproved 2023)
Standard Specification for
Nonvulcanized (Uncured) Rubber Sheet Used as Roof
Flashing
This standard is issued under the fixed designation D4811/D4811M; the number immediately following the designation indicates the
year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last
reapproval. A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 2. Referenced Documents
2.1 ASTM Standards:
1.1 This specification covers nonvulcanized (uncured) rub-
D412TestMethodsforVulcanizedRubberandThermoplas-
ber sheet made of EPDM (ethylene-propylene-diene terpoly-
tic Elastomers—Tension
mer) or CR (polychloroprene) intended for use as watertight
D471Test Method for Rubber Property—Effect of Liquids
roof flashing exposed to the weather.
D518 Test Method for Rubber Deterioration—Surface
1.2 The tests and property limits used to characterize these
Cracking (Withdrawn 2007)
flashing materials are specific for each classification and are
D573Test Method for Rubber—Deterioration in an Air
minimum values to make the product fit for its intended
Oven
purpose. D624Test Method for Tear Strength of Conventional Vul-
canized Rubber and Thermoplastic Elastomers
1.3 The values stated in either SI units or inch-pound units
D1079Terminology Relating to Roofing and Waterproofing
are to be regarded separately as standard. The values stated in
D1149TestMethodsforRubberDeterioration—Crackingin
each system may not be exact equivalents; therefore, each
an Ozone Controlled Environment
system shall be used independently of the other. Combining
D1204Test Method for Linear Dimensional Changes of
values from the two systems may result in nonconformance
Nonrigid Thermoplastic Sheeting or Film at Elevated
with the standard.
Temperature
D1418 Practice for Rubber and Rubber Latices—
1.4 In-place roof system design criteria, such as fire
Nomenclature
resistance, field seaming strength, material compatibility, and
D2137TestMethodsforRubberProperty—BrittlenessPoint
uplift resistance, among others, are beyond the scope of this
of Flexible Polymers and Coated Fabrics
specification.
D3182PracticeforRubber—Materials,Equipment,andPro-
1.5 The following precautionary caveat pertains to the test
cedures for Mixing Standard Compounds and Preparing
methods portion only, Section 8, of this specification: This
Standard Vulcanized Sheets
standarddoesnotpurporttoaddressallofthesafetyconcerns,
G151PracticeforExposingNonmetallicMaterialsinAccel-
ifany,associatedwithitsuse.Itistheresponsibilityoftheuser
erated Test Devices that Use Laboratory Light Sources
of this standard to establish appropriate safety, health, and
G154Practice for Operating Fluorescent Ultraviolet (UV)
environmental practices and determine the applicability of
Lamp Apparatus for Exposure of Nonmetallic Materials
regulatory limitations prior to use. G155PracticeforOperatingXenonArcLampApparatusfor
Exposure of Materials
1.6 This international standard was developed in accor-
dance with internationally recognized principles on standard-
3. Classification
ization established in the Decision on Principles for the
3.1 The following types are used to identify the principal
Development of International Standards, Guides and Recom-
polymer components of the flashing material (see Note 1):
mendations issued by the World Trade Organization Technical
3.1.1 Type I—Ethylene-Propylene-Diene Terpolymer
Barriers to Trade (TBT) Committee.
(EPDM).
1 2
This specification is under the jurisdiction of ASTM Committee D08 on For referenced ASTM standards, visit the ASTM website, www.astm.org, or
RoofingandWaterproofingandisthedirectresponsibilityofSubcommitteeD08.18 contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
on Nonbituminous Organic Roof Coverings. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved Jan. 1, 2023. Published January 2023. Originally the ASTM website.
approved in 1990. Last previous edition approved in 2016 as D4811/D4811M–16. The last approved version of this historical standard is referenced on
DOI: 10.1520/D4811_D4811M-16R23. www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D4811/D4811M−16 (2023)
TABLE 2 Property Requirements for Flashing After Vulcanization
3.1.2 Type II—Chloroprene Polymer (CR).
Type I, Type II,
NOTE 1—For definitions of polymer types, see Practice D1418. For
Class V Class V
definitions of terms related to roofing, see Terminology D1079.
Vulcanization, at 160 °C [320 °F], min 20 ± 2 20 ± 2
Tensile Strength, min, MPa [psi] 9.0 [1305] 8.3 [1205]
3.2 The following classes describe the ability to vulcanize
Elongation, min, % 300 250
on the roof:
Tear Resistance, min, kN/m [lb/in.] 22 [125] 22 [125]
3.2.1 Class V—Vulcanizing.
Brittle Point, max, °C [°F] −45 [−49] pass −35 [−31] pass
3.2.2 Class NV—Nonvulcanizing. Tensile Set, max, % 10 10
Ozone Resistance, (7×) no cracks no cracks
NOTE 2—Class V compounds continue to vulcanize (that is, cure) after Heat Aging, Air Oven
Tensile Strength, min, MPa [psi] 8.3 [1205] 8.3 [1205]
emplacement on the roof. Class NV indicates non-vulcanizable com-
Elongation, min, % 200 200
pounds.
Tear Resistance (Die C), kN/m [lbf/in.], 22 [125] 22 [125]
min
4. Materials and Manufacture
Water Absorption, weight change, range, % +8, −2 +8, −2
Linear Dimension Change, max, % ±2 ±2
4.1 The flashing material shall be formulated from the
Weatherability, no cracks or crazing pass pass
appropriate polymer type and other compounding ingredients.
The principal polymer in the flashing material shall be one of
those listed in 3.1 and greater than 95% of the total polymer.
4.2 The flashing material shall be capable of being bonded
6.2 Sheet thicknesses greater than minimum shall be agreed
to itself, to the roofing membrane, and to substrate for making
upon between the purchaser and the supplier as part of the
watertight field splices and repairs. The manufacturer or
purchase contract.
fabricator shall recommend suitable bonding methods and
6.2.1 The thickness tolerance shall be+15% and−10% of
materials.
the specified thickness, but in no case shall the thickness be
less than the minimum listed in Table 1.
5. Physical Property Requirements
7. Workmanship, Finish, and Appearance
5.1 Class V flashing material shall conform to the physical
property requirements prescribed in Tables 1 and 2. Class NV
7.1 The flashing material shall be visually free of pinholes,
flashing material shall conform to the physical property re-
particles of foreign matter, undispersed raw materials, or other
quirements prescribed in Table 1.
manufacturing defects that might affect serviceability.
5.2 Other requirements shall be agreed upon between the
7.2 If the number of irregularities appear excessive on a
purchaser and the supplier as part of the purchase contract.
sheet (or portion thereof), then its rejection should be negoti-
ated between involved parties.
6. Dimensions and Permissible Variations
7.3 Edges of the sheet shall be capable of being seamed to
6.1 The width and length shall be agreed upon between the
one another and to other roofing components without fish-
purchaser and the supplier as part of the purchase contract.
mouthing.
6.1.1 The width and length tolerance shall be +3 %
and−0%.
8. Test Methods
8.1 Thickness—Test Methods D412.
TABLE 1 Property Requirements for Flashing Before
8.2 Green Strength:
Vulcanization
8.2.1 Test a fresh sample manufactured within one week.
Type I, Type I, Type II,
8.2.2 ConditionTypeImaterialat23 62°C[73 64°F]for
Class V Class NV Class V
a minimum of 1 h and a maximum of 8 h before proceeding
Thickness, min, mm [in.] 1.4 [0.055] 1.4 [0.055] 1.4 [0.055]
with the testing.
Green Strength Modulus
172–1725 172–1725 172–517
100 % at 23 °C [73 °F] kPa
8.2.3 Decrystallize Type II material by placing in a circu-
[25–250] [25–250] [25–75]
[psi]
lating air oven at 70 6 2°C [158 6 4°F] for 15 min. After
Elongation (Ultimate), min, % 400 400 400
removalfromtheoven,conditionat23 62°C[73 64°F]for
Modulus 100 % at 50 °C 83 [12] 83 [12] 83 [12]
[122 °F] kPa [psi]
a minimum of 1 h and a maximum of 8 h before proceeding
Elongation (Ultimate), min, % 200 200 200
with the testing.
Shelf Stability:
8.2.4 Afterconditioning,dieouta13mm[0.5in.]dumbbell
Modulus 100 %
at 23 °C [73 °F], max, kPa 1725 [250] n/a 1725 [250]
(DieA)anddeterminethemodulusat100%extensionandthe
[psi]
ultimate elongation at 23 6 2°C [73 6 4°F] in accordance
Elongation, min, % 400 n/a 400
with T
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