Published: Jan 1976
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This paper gives an early history of various back-up materials, and elaborates on early sealant failures which were due in part to improper joint design. Satisfactory joint sealant performance therefore depended on proper selection of back-up materials and proper joint design. The authors elaborate on the latest technology. General requirements and proposed tests for back-up materials from ASTM Subcommittee C24.40 are given.
sealers, construction materials, fillers
Senior research chemist, Rubatex Corp., Bedford, Va.
Technical sales representative, Tremco, Inc., Newtown, Pa.