UL® performs various tests to determine the suitability of pipe sealants for a particular use. The UL® classification does not state the strength of the product or the maximum sealing pressure for other uses. For example, Permabond LH050 is classified by Underwriters Laboratories Inc.® for use in devices handling gasoline, petroleum oils, and natural gas …Continue readingUL® Classification of Pipe Sealants (thread sealants)