Imperflex® MSA is a mineral-surfaced SBS modified bitumen cap sheet used to complete the Imperflex® roof system. Imperflex® MSA is coated with factory-installed, colored ceramic-coated roof granules, providing protection from UV degradation.
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Imperflex® USA is a smooth-surfaced SBS modified bitumen base sheet designed specifically for use in Imperflex® roof systems. This versatile product can also be used as an underlayment and for waterproofing below-grade foundations, footings and basements.