The new TruDefinition Duration FLEX shingle from Owens Corning Roofing is manufactured with a proprietary blend of SBS polymer modified asphalt. The unique blend creates a rubberizing effect, delivering a pliable shingle with greater flexibility and toughness than standard shingles.  The SBS modified polymer shingle comes with the advanced performance of SureNail Technology for added confidence with windy conditions. Its durability helps TruDefinition Duration FLEXTM provide the highest impact rating: UL 2218 Class 4. Learn more at