Diamond Jumbolon, a brand of Symbol Industries (Pvt.) Limited is Pakistan’s pioneer in insulation technology.

Our major product, Diamond Jumbolon Board, is the country's first
Extruded Polystyrene rigid insulation (XPS). Famous for its extraordinary thermal resistance, Diamond Jumbolon is a favorite option for efficient and sustainable construction insulation. Committed to international quality standards, our state-of-the-art manufacturing process strictly follows ASTM C578. With a team supported by ISO 9001-2015 Certification and decades of experience, we provide high-demonstration insulation solutions that optimize energy efficiency, increase comfort, and contribute to durable buildings.

Beyond the Diamond Jumbolon Board, we provide a comprehensive category of insulation materials including Diamond Jumbolon Sheet/Roll to address various insulation, waterproofing, and heatproofing requirements.