PT. Sumber Djaja Perkasa is a plastic manufacturing company based in Sidorja that has been established since 1965. This company produced Atap Dingin Rooftop in Indonesia. The Atap Dingin Rooftop is the first uPVC roof with double wall corrugated roofing profile since 2004. Atap Dingin Rooftop has been proven to be the best and most trusted brand for the uPVC roof with more than 13 years experience in the local market as well as global market. This product advantage in two types: Doff/Opaque(Solid Colour)&Semi Transparent/Translucent (20% light permeability).