The compression behavior of RHP-incorporated NRLF samples were tested according to ASTM D3574. The samples used in this test method were in the regular shape of 50 by 50 by 25 mm, with parallel top and bottom surfaces and essentially perpendicular sides. Samples of RHP-incorporated NRLF with 0 phr (control), 2.5 phr, 5.0 phr, 7.5 phr, and 10 phr filler loading were analyzed. Three specimens per sample were tested. The specimens were placed in a test apparatus and deflated to 75±1% of their original thickness.