Shop for Impact Modified Acrylic sheet packs. Impact modified acrylic sheet is exceptionally tough compared to window glass making it an excellent choice for displays, skylights, and signage. Impact modified acrylic is an economical alternative to polycarbonate with advantages of weatherability and thermoforming capabilities. It is sold in convenient packs ranging from 4-12 sheets. Stocked materials typically ship in 2-5 business days. Can’t find what you need? Get a quote.