W. CONSHOHOCKEN, Pa. — The American Society for Testing and Materials (ASTM) hardware-based weathering Standards G 23, G 26 and G 53 were slated to be withdrawn by December 2000 and should be replaced with improved, performance-based Standards G 151 through G 155.
The new documents, which have been available since 1997 and which received minor revisions in 1999, were created by a task group of Subcommittee G03.03 on Simulated and Controlled Exposure Tests in Committee G-3 on Weathering and Durability.