ASTM C1643-14 (R2020) PDF Download

ASTM C1643-14 (R2020) is a standard test method that measures the post dispensing volumetric expansion of aerosol foam sealants. The test method provides a means for estimating the quantity of initial material required to fill a cavity. The post dispensing volumetric expansion factor (F) is used to indicate the ratio of the fully cured foam sealant volume to the initially dispensed foam sealant volume.

The standard emphasizes that the expansion factor does not predict the performance capability or suitability of the foam sealants for specific applications. It is intended to offer guidance in product selection based on the post dispensing expansion characteristics. However, it should be noted that the results obtained in controlled laboratory conditions may vary in real-world field applications due to factors such as temperature, humidity, and surfaces the aerosol foam sealants come into contact with.

The test method applies to two types of single component aerosol foam sealants: polyurethane and latex. It is worth mentioning that there are no other known standard test methods available for measuring aerosol foam sealants' post dispensing expansion. The values are reported in SI units, with certain apparatus and supply items referenced in inch-pound units for purchasing purposes.