Sunpack Sheet is a high quality, tough and durable polypropylene co-polymer in corona treatment or with UV stabilizes, which can withstand sunlight and general weather conditions. Sunpack Sheet is an excellent substitute for poster board or card stock for interior applications. Its surface is not affected by most oils, solvents or water, and cleans easily. It is used in outdoors yard signs, warning signs, campaign signs, advertising boards, digital printing and screen-printing etc.