ASTM D3468-99

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Designation: D 3468 – 99
Standard Specification for
Liquid-Applied Neoprene and Chlorosulfonated
Polyethylene Used in Roofing and Waterproofing
This standard is issued under the fixed designation D3468; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope 2.2 Department of Commerce Voluntary Product Standard:
PS-1 Construction and Industrial Plywood
1.1 This specification covers liquid-applied neoprene and
chlorosulfonated polyethylene synthetic rubber solutions suit-
3. Classification
able for use in roofing and waterproofing.
3.1 Type I—Neoprene synthetic rubber solutions for use
1.2 The following precautionary caveat pertains only to the
alone or in combination with chlorosulfonated polyethylene
test method portion, Section 9, of this specification: This
synthetic rubber solutions:
standard does not purport to address the safety concerns, if
3.1.1 Grade 1—Neoprene rubber solution.
any, associated with its use. It is the responsibility of the user
3.1.2 Grade 2—Fiber-modified neoprene rubber solution.
of this standard to establish appropriate safety and health
3.2 Type II—Chlorosulfonated polyethylene synthetic rub-
practices and determine the applicability of regulatory limita-
ber solutions.
tions prior to use.
4. Materials and Manufacture
2. Referenced Documents
4.1 The designated polymer shall comprise 100% of the
2.1 ASTM Standards:
elastomer and a minimum of 60% of the nonvolatile content.
D412 Test Methods for Rubber Properties in Tension
4.2 The designated polymer shall be homogeneously com-
D429 Test Methods for Rubber Property—Adhesion to
pounded with pigments, extenders, stabilizers, antidegradants,
Rigid Substrates
and curatives. The product shall be free from graininess, gel
D471 Test Method for Rubber Property—Effect of Liq-
particles, and foreign materials.
uids
D711 Test Method for No-Pick-Up Time of Traffic Paint
5. Physical Requirements
D823 Practices for Producing Films of Uniform Thickness
5.1 The material shall conform to the physical properties
of Paint, Varnish, and Related Products on Test Panels
prescribed in Table 1.
D1149 Test Method for Rubber Deterioration— Surface
Ozone Cracking in a Chamber
6. Sampling
D1640 Test Methods for Drying, Curing, or Film Forma-
6.1 The sample shall be a 1-qt (1-L) aliquot consisting of a
tion of Organic Coatings at Room Temperature
composite taken, when possible, from three or more separate
D1644 TestMethodsforNonvolatileContentofVarnishes
containers chosen at random. Samples shall also be taken from
D1824 Test Method for Apparent Viscosity of Plastisols
any other containers that appear to be nonrepresentative and
andOrganisolsatLowShearRatesbyBrookfieldViscom-
shall be tested separately. Before a sample is withdrawn, the
eter
contents in the container shall be mixed to uniform consis-
E96 Test Methods for Water Vapor Transmission of Mate-
6 tency. The sample shall be placed immediately in an airtight
rials
glass jar or metal can until tested.
7. Retest and Rejection
This specification is under the jurisdiction of ASTM Committee D-8 on
7.1 If the results of any test do not conform to the require-
Roofing, Waterproofing, and Bituminous Materials, and is the direct responsibility
of Subcommittee D08.18 on Nonbituminous Organic Roof Coverings.
ments of this specification, retesting to establish conformity
Current edition approved Jan. 10, 1999. Published March 1999. Originally
may be performed as agreed upon between the purchaser and
published as D3468–75T. Last previous edition D3468–90.
the seller.
Annual Book of ASTM Standards, Vol 09.01.
Annual Book of ASTM Standards, Vol 06.02.
Annual Book of ASTM Standards, Vol 06.01.
5 7
Annual Book of ASTM Standards, Vol 08.01. Available from the Superintendent of Documents, U. S. Government Printing
Annual Book of ASTM Standards, Vol 04.06. Office, Washington, DC 20402.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
D3468–99
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 % 62 % of the qualification value
A
Viscosity, mPa·s (cP) 620 % of the qualification value
Drying time, h:
Dry-to-touch . 4 . 12 . 4
Dry hard . 16 . 24 . 24
Solids, volume % 20 . 20 . 20 .
Cured films:
Tensile strength, psi (MPa) 1600 (11) . 700 (4.8) . 700 (4.8) .
Elongation at 73.46 450 . 450 . 350 .
3.6°F (23 6 2°C), %
Elongation at − 0.46 120 . 120 . 120 .
3.6°F (−186 2°C), %
Permanent set at break, % . 50 . 50 . 50
Elongation of aged film at 73.46 3.6°F 100 . 100 . 200 .
(23 6 2°C), %
Water absorption, % . 4.0 . 4.0 . 4.0
Water vapor permeability, perm-inches (ng/Pa·s·m) . 0.010 . 0.010 . 0.010
(0.0146) (0.0146) (0.0146)
Ozone resistance . . . . no cracks under 103
magnification
Adhesion, lbf/in. (kN/m) width 20 (3.5) . 10 (1.8) . . .
A
Qualification value is that agreed upon between the seller and purchaser.
8. Specimen Preparation the kraft paper to ensure smooth, tight contact with the
plywood sheet. Prepare a primer consisting of one part of the
8.1 PrepareallfilmspecimensinaccordancewithMethodD
test coating and two parts of xylene, well stirred together.
of Test Methods D823. Take care to prevent puddling and
Brush-apply a coat of primer to the plywood sheet including
keep specimens horizontal at all times. When more than one
the paper-covered end, and allow to dry to touch. Then apply
coat is required, allow each to dry to touch prior to application
two coats of the undiluted test coating, each coat having a
of subsequent coats.
minimum wet-film thickness of 30 mils (0.75 mm). When the
8.2 Prepare 10-mil (0.25-mm) wet film specimens for de-
5 final test coat has dried for 24 h, brush-apply two coats of
terminationofdryingtimeonglassplates,approximately ⁄8by
neoprene contact adhesive to the test specimen and toa9by
3 in. (15 by 75 mm).
24-in. (225 by 600-mm) strip of No. 10 canvas duck. Allow
8.3 Prepare 30-mil (0.75-mm) wet film specimens for de-
9 both surfaces to dry to a tacky state and then mate the coated
termination of solids, percent by volume, on a release surface
side of the canvas strip to the test specimen to facilitate
approximately 3 by 6 in. (75 by 150 mm).
stripping of the film. Cure the test specimens in accordance
8.4 Prepare cured film specimens for all tests except adhe-
with the coating manufacturer’s instructions, and then condi-
sion on release paper approximately 10 by 14 in. (250 by 350
tion the cured specimens for 72 h at 73.4 6 3.6°F (236 2°C).
mm). Adjust the doctor blade to produce a wet film that will
After conditioning, strip back the cellophane tape holding the
give a tota
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