Waterproof blue plastic sheet In Various lors - HNOKAY Engineering Plastic Bacit Cast Board HENAN Okay Board Sheet Waterproof Customized blue lor made in china. Ready to HDPEp. $1.00/ Piece. 1 Piece (Min. Order) $16.58/Piece (HDPEpping) CN Hebei Qigao Engineering Plastics ., . 1 YRS. ntact Supplier.