About Longda

Longda Technologies Canada and the registered trademark ASDA® are parts of the Longda Resin Group.

Longda Resin Group has been a professional R&D and manufacturing company of high-standard electrical insulation and temperature-resistant materials for 30 years. We are a stable supplier to home appliances, electrical, electronics, automobiles, cosmetics, and medical care companies.

The company can supply the whole industry chain, from raw materials and adhesives to tapes. We make personalized product design and provide technical service solutions from the raw material side based on customers' needs. 

Thirty thousand tons of resins are produced yearly at LONGDA. We have equipped the facilities with fully automated manufacturing lines and an experienced management team, from incoming to final shipment inspection. 

Tests, Capabilities, and R&D

Safety is the first risk during a company's development, and strictness is the eternal theme in its operation. 

Our resin products are certified for RoHS, REACH and UL-94. Our tape products meet the GB/T19216-2003 and IEC 60331-21:1999 fire resistance test requirements. The manufacturing process is certified for ISO 9001:2015, ISO 14001:2015, and ISO 45001: 2018 to ensure quality and environment. 

LONGDA continually strives for advanced technologies and products for the market and our clients. We own 14 invention patents. Our team is always ready to provide high-quality and efficient technical support. If a standard product can not fully meet your needs, we are happy to discuss the performance for you. 

Annual Manufacturing Capacities

Our products include polyurethane and silicone base materials, insulation and sealing materials for electronic appliances, pressure-sensitive adhesives for various engineering materials, wire and cable insulation and fireproof tapes, glass fiber and high-temperature resistant insulation tapes, and medical tapes.

30 Years in Performance

First 10 Years


In 1993, Longda built Plant Yantai on a 6,000 m2 plot of land with a 1,800 m2 factory. Longda started manufacturing and developing Polyurethane Encapsulation Resin and Epoxy Adhesives. We moved Plant Yantai in 2009 to increase capacity.


In 1997, Longda started silicone R&D.


In 2002, we established an import and export office in Shanghai, China.


Second 10 Years


In 2003, Longda built Plant Wuxi on a 15,000 m2 plot of land with a 4,000 m2 factory. We started manufacturing and developing silicone materials.


In 2008, we were selected as a global supplier of major appliance brands and obtained a global supplier code.

In 2009, to increase capacity, we moved Plant Yantai to 15 Tianjin North Road, covering an area of 10,000 m2 and a construction area of 6,000 m2.


In 2012, we started exporting silicone materials to Malaysia.


Third 10 Years


In 2014, we started supplying medical-grade pressure-sensitive adhesives to the medical industry.


In 2016, Longda started supplying environment-friendly coatings to electronic fields.


In 2018, Longda established a trading office in Canada and started exporting to Mexico, the US, and Brazil.


In 2019, Longda built Plant Anhui on a 100,000 m2 plot of land with a 60,000 m2 factory. Longda started manufacturing and developing fire-resistant insulating tapes for the power cable industry.