Standard Practice for
Application of Emulsified Coal-Tar Pitch
(Mineral Colloid Type)1
This standard is issued under the fixed designation D 3423; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This practice covers the application of mineral-colloid stabilised, emulsified coal-tar pitch meeting the requirements
of Specification D 3320, as weather protection and aliphatic solvents-resistant sealer for use on bituminous pavements of
airports, parking lots, and driveways.
1.2 The values stated in SI units are to be regarded as the
standard. The values given in parentheses are for information
only.
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents
2.1 ASTM Standards:
D 3320 Specification for Emulsified Coal-Tar Pitch (Mineral Colloid Type)2
3. Preparation of Surface
3.1 Old Asphalt Surfaces (those which have weathered over
a change of seasons):
3.1.1 Repair and patch all pavement defects. If a solvent
containing cold-applied material is used, this should be done a
minimum of 90 days prior to the planned application of the
sealer to permit solvent escape before sealing.
3.1.2 Thoroughly inspect the pavement surface for minor
cracks or other imperfections. Ignore hairline cracks. Open
minor cracks (less than 12.7 mm (1⁄2 in.)) to a minimum depth
and width of 12.7 mm and fill with a crack filler approved by
the manufacturer of the sealer. Wider cracks, along with soft or
sunken spots, indicate that the pavement or the pavement base
should be repaired or replaced.
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