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ASTM Selected Technical Papers
Science and Technology of Building Seals, Sealants, Glazing, and Waterproofing
By
CJ Parise
CJ Parise
1
Smith, Hinchman & Grylls
,
Detroit, MI 48226
;
symposium chairman and editor
.
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ISBN-10:
0-8031-1482-6
ISBN:
978-0-8031-1482-1
No. of Pages:
176
Publisher:
ASTM International
Publication date:
1992

The current methods for determining the suitability of sealants for use in water environments are discussed. In particular the paper outlines the factors governing the durability of polysulfide sealants to long-term water immersion in building and civil engineering applications. Particular reference is made to the sealant formulation and the guidelines that should be followed to ensure longevity of adhesion in water-retaining structures and bioresistance in sewage plants. Parameters such as polymer content, curative type, and the nature and level of other compounding ingredients as they relate to long-term performance in water are examined. The role of primers is considered.

The nature of the biodeterioration of sealants is discussed, and an accelerated test for determining the performance of polysulfide sealants in bacteria-rich environments and how it correlates to field tests is described. The results of a ten-year trial at a sewage treatment plant are given.

International regulations for the use of nonmetallic materials in potable water and their significance to the sealant industry are reviewed.

1.
Lee
,
T. C. P.
, “
Formulating Property Requirements for Long-Term Water Immersion
,” in
Proceedings
, Building Joint Sealants, International Symposium,
Boras, Sweden
,
1988
.
2.
Dow
,
C. S.
, “
Biodegradation of Polysulphide Sealants
,” private communication, University of Warwick, Biological Sciences, Coventry, U.K.,
1990
.
3.
Bergmann
,
F. J.
, “
1-Part Thiokol LP-based Sealant for High Humidity Areas
,” private communication, Thiokol GmbH., 6800 Mannheim Waldhof, Germany,
1990
.
4.
Comyn
,
J.
, “
Diffusion and Adhesion
,” in
Polymer Permeability
,
Comyn
J.
, Ed.,
Elsevier Applied Science
,
Amsterdam
,
1985
, pp. 177–215.
5.
Gill
,
B. W.
, “
Development of a Water Resistance Test
,”
Performance of Civil Engineering Sealants under Wet Conditions
, CIRIA Contract RP355,
CIRIA
,
Westminster, London
,
1988
.
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