[ Ссылка ] - The ASTM C1183 test provides an indication of how durable the sealant will be when field applied. According to the specification, a sealant shall have a hardness reading of less than 60. DAP DYNAFLEX 920 has a hardness rating of 39. DAP DYNAFLEX 920 premium exterior elastomeric sealant is part of the DAP SpecLine of professional grade construction materials.
