1 ASTM is an acronym for the American Society for Testing & Materials. It is an international
organization made up of engineers, scientists, educators, manufacturers, government agencies, etc.
The society determines methodologies for materials testing and sets standards that materials
should meet in areas such as strength and durability. ASTM standard D6432 was developed by
groups of engineers and scientists who are members of this organization. So when you see “Meets
ASTM Standard D6432” stamped on a bundle of shingles, it is your assurance that this product has
met durability criteria as determined by a group of neutral scientists and engineers.