Duolong focuses on the manufacturing and supply of XPS (extruded polystyrene) insulation boards for construction projects, distributors, and export customers. With a closed-cell structure, XPS delivers low thermal conductivity, low water absorption, and strong compressive performance—making it a practical solution for areas that face moisture and long-term loads. Typical applications include inverted and flat roofs, underfloor heating systems, slab-on-grade floors, basement perimeter insulation, foundations, and cold storage facilities where stable insulation and condensation control matter.

At Duolong, we pay close attention to two things buyers care about most: batch consistency and on-time delivery. During production, we control key indicators such as thickness tolerance, density uniformity, and compressive strength, supported by routine inspection and record keeping. This helps contractors install with confidence and helps project owners reduce the risk of performance variation across different shipments.

To make procurement smoother, Duolong provides clear documentation aligned with B2B needs, including product datasheets, MSDS, and test reports when available. These materials support tendering, inspection, and customs clearance, saving time and preventing back-and-forth communication. We also support customization for different markets and channels, including board dimensions, colors, edge profiles (square edge, shiplap, tongue-and-groove), as well as OEM labeling and packaging.

From sampling to mass production, our workflow is straightforward: confirm one specification sheet, one packing standard, and one delivery schedule. We can also offer practical container loading suggestions to improve space utilization and reduce transit damage. Choosing Duolong means choosing stable quality, complete documentation, flexible customization, and dependable execution—so your projects and repeat orders are easier to manage.