... safety high duration UL and NSF61 prompt delivery Rubber corner bead,Safe Road 1. Black rubber with yellow reflective film, it ... strength, in MPa, minASTM D41210.315 18Elongation, @Break % min150325 444Compression Set, % @70°C/ 22 hoursASTM D395Method B20%11% 19%Ozone Resistance ... %82.9%2) Retention of Elongation, %60%95% Rubber corner bead