Advanced Polyester Extrusion–Apex SDP is Engineered Floors’ new commercial polyester fiber. Available through Engineered Floors’ commercial brand, Pentz Commercial Flooring Solutions, Apex SDP is PET specifically designed and engineered for commercial applications. Apex SDP includes the styles Revival (shown here) and Revolution, both offering lifetime warranties on stain removal, static and colorfastness to light and atmospheric contaminants.