ASTM D3468/D3468M-99(2020)

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:D3468/D3468M −99 (Reapproved 2020)
Standard Specification for
Liquid-Applied Neoprene and Chlorosulfonated
Polyethylene Used in Roofing and Waterproofing
This standard is issued under the fixed designation D3468/D3468M; 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 D823Practices for Producing Films of Uniform Thickness
of Paint, Coatings and Related Products on Test Panels
1.1 This specification covers liquid-applied neoprene and
D1149TestMethodsforRubberDeterioration—Crackingin
chlorosulfonated polyethylene synthetic rubber solutions suit-
an Ozone Controlled Environment
able for use in roofing and waterproofing.
D1640/D1640MTest Methods for Drying, Curing, or Film
1.2 The values stated in either SI units or inch-pound units
Formation of Organic Coatings
are to be regarded separately as standard. The values stated in
D1644Test Methods for Nonvolatile Content of Varnishes
each system may not be exact equivalents; therefore, each
D1824Test Method forApparentViscosity of Plastisols and
system shall be used independently of the other. Combining
Organosols at Low Shear Rates
values from the two systems may result in nonconformance
E96/E96MTest Methods for Water Vapor Transmission of
with the standard.
Materials
1.3 The following precautionary caveat pertains only to the
2.2 Department of Commerce Voluntary Product Standard:
Test Methods portion, Section 9, of this specification: This
PS-1Construction and Industrial Plywood
standard does not purport to address all of the safety concerns,
if any, associated with its use. It is the responsibility of the user 3. Classification
of this standard to establish appropriate safety, health, and
3.1 Type I—Neoprene synthetic rubber solutions for use
environmental practices and determine the applicability of
alone or in combination with chlorosulfonated polyethylene
regulatory limitations prior to use.
synthetic rubber solutions:
1.4 This international standard was developed in accor-
3.1.1 Grade 1—Neoprene rubber solution.
dance with internationally recognized principles on standard-
3.1.2 Grade 2—Fiber-modified neoprene rubber solution.
ization established in the Decision on Principles for the
3.2 Type II—Chlorosulfonated polyethylene synthetic rub-
Development of International Standards, Guides and Recom-
ber solutions.
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
4. Materials and Manufacture
2. Referenced Documents 4.1 The designated polymer shall comprise 100% of the
2 elastomer and a minimum of 60% of the nonvolatile content.
2.1 ASTM Standards:
D412TestMethodsforVulcanizedRubberandThermoplas- 4.2 The designated polymer shall be homogeneously com-
tic Elastomers—Tension pounded with pigments, extenders, stabilizers, antidegradants,
D429Test Methods for Rubber Property—Adhesion to and curatives. The product shall be free from graininess, gel
Rigid Substrates particles, and foreign materials.
D471Test Method for Rubber Property—Effect of Liquids
5. Physical Requirements
D711Test Method for No-Pick-Up Time of Traffic Paint
5.1 The material shall conform to the physical properties
prescribed in Table 1.
This specification is under the jurisdiction of ASTM Committee D08 on
RoofingandWaterproofingandisthedirectresponsibilityofSubcommitteeD08.09
6. Sampling
on Bituminous Emulsions.
Current edition approved May 1, 2020. Published May 2020. Originally
6.1 The sample shall be a 1-L [1-qt] aliquot consisting of a
approved in 1975. Last previous edition approved in 2013 as D3468/D3468M–99
composite taken, when possible, from three or more separate
(2013). DOI: 10.1520/D3468_D3468M-99R20.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on Available from the Superintendent of Documents, U. S. Government Printing
the ASTM website. Office, Washington, DC 20402.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D3468/D3468M−99 (2020)
TABLE 1 Physical Properties of Neoprene and Chlorosulfonated Polyethylene Synthetic Rubber Solutions
and Cured Films
Type I (Neoprene)
Type II (Chlorosulfonated
Polyethylene)
Property Grade 1 Grade 2
min max min max min max
Synthetic rubber solutions:
A
Solids, weight % ±2 % of the qualification value
A
±20 % of the qualification value
Viscosity, mPa·s [cP]
Drying time, h:
Dry-to-touch . . . 4 . . . 12 . . . 4
Dry hard . . . 16 . . . 24 . . . 24
Solids, volume % 20 . . . 20 . . . 20 . . .
Cured films:
Tensile strength, MPa [psi] 11 [1600] . . . 4.8 [700] . . . 4.8 [700] . . .
Elongation at 23 ± 2 °C 450 . . . 450 . . . 350 . . .
[73.4 ± 3.6 °F], %
Elongation at −18 ± 2 °C 120 . . . 120 . . . 120 . . .
[−0.4 ± 3.6 °F], %
Permanent set at break, % . . . 50 . . . 50 . . . 50
Elongation of aged film at 23 ± 2 °C 100 . . . 100 . . . 200 . . .
[73.4 ± 3.6 °F], %
Water absorption, % . . . 4.0 . . . 4.0 . . . 4.0
Water vapor permeability, ng/Pa·s·m [perm-inches] . . . 0.0146 . . . 0.0146 . . . 0.0146
[0.010] [0.010] [0.010]
Ozone resistance . . . . . . . . . . . . no cracks under 10×
magnification
Adhesion, kN/m [lbf/in.] width 3.5 [20] . . . 1.8 [10] . . . . . . . . .
A
Qualification value is that agreed upon between the seller and purchaser.
containers chosen at random. Samples shall also be taken from 8.4 Prepare cured film specimens for all tests except adhe-
any other containers that appear to be nonrepresentative and sion on release paper approximately 250 by 350 mm [10 by
shall be tested separately. Before a sample is withdrawn, the 14in.].Adjust the doctor blade to produce a wet film that will
contents in the container shall be mixed to uniform consis- give a total dry film thickness of approximately 0.40 mm
tency. The sample shall be placed immediately in an airtight [15mils] after two applications. Dry the specimens for 24 h at
glass jar or metal can until tested. 23 62°C[73.4 63.6°F]and50 65%relativehumidity,and
then cure them in accordance with the coating manufacturer’s
7. Retest and Rejection
instructions. Condition the cured specimens for 72 h at 23 6
7.1 If the results of any test do not conform to the require- 2°C [73.4 6 3.6°F] before carefully stripping the film from
the release paper.
ments of this specification, retesting to establish conformity
may be performed as agreed upon between the purchaser and
8.5 Prepare cured film specimens for the adhesion test on
the seller.
the A face of a 13-mm [ ⁄2-in.] exterior grade plywood sheet
conforming to the requirements ofVoluntary Product Standard
8. Specimen Preparation
PS-1, approximately 225 by 450 by 6 mm [9 by 18 by ⁄4 in.],
8.1 PrepareallfilmspecimensinaccordancewithMethodD
with 150 mm [6 in.] at one end covered by kraft paper. Use
of Practices D823. Take care to prevent puddling and keep
strips of cellophane pressure-sensitive tape along each edge of
specimens horizontal at all times. When more than one coat is
the kraft paper to ensure smooth, tight contact with the
required, allow each to dry to touch prior to application of
plywood sheet. Prepare a primer consisting of one part of the
subsequent coats.
test coating and two parts of xylene, well stirred together.
Brush-apply a coat of primer to the plywood sheet including
8.2 Prepare 0.25-mm [10-mil] wet film specimens for de-
the paper-covered end, and allow to dry to touch. Then apply
terminationofdryingtimeonglassplates,approximately15by
two coats of the undiluted test coating, each coat having a
75 mm. [ ⁄8 by 3 in.].
minimum wet-film thickness of 0.75 mm [30 mils]. When the
8.3 Prepare 0.75-mm [30-mil] wet film specimens for de-
final test coat has dried
...