Founded in 1989, Kelong enterprise has been engaged in the research, development, manufacturing and sales of plastic building materials, which has developed from single-layer-coextrusion development to the multi-layer-coextrusion development to create a brand new application field for the plastic building materials.

The major products of our company are PC sheet, sun panel, heat-molded lighting shield series, and Hongbo APVC compound corrugated roofing sheet, FRP lighting sheet, PC transparent corrugated roofing sheet, PVC corrugated roofing sheet, flat sheet and sheet series of products, among which PC sheet series of products adopts the world's most advanced technology of five-layer coextrusion to manufacture single-side and dual-sided UV coating. Excellent hardware, mature manufacturing ability and strict ISO quality management system guarantee the stability and dependability of the quality of the products. The products have found wide application in all trades including architecture, Advertising, greenhouse planting, household electric appliance and mechanism.