Polymer Characteristics: Elastomers based on Andur® BD 78 AP show excellent resistance to aqueous environments even at high temperatures up to 100C. They also show excellent resistance to aqueous acids, bases and bleach. This will enable Andur® BD 78 AP elastomers to be put in applications where other conventional polyurethane elastomers cannot go. Andur® BD 78 AP is not compatible with Curene® 442 (MBOCA).