Shop for TUFFAK® Sign Grade Polycarbonate sheets. TUFFAK® SL (formerly called Makrolon®) is a polycarbonate sheet with enhanced UV resistance, exceptional weatherability, and superior impact strength designed for signage. Custom cuts and cut-to-size available. Polycarbonate comes in colors. Stocked materials typically ship in 2-5 business days. Can’t find what you need? Get a quote.