Insilco Limited, a group company of Degussa AG, Germany, is the leading producer of precipitated silica in South Asia & largest manufacturer in India. It was formed as a joint venture company in 1988. In April 1999, Degussa took-over the majority equity holding, thereby raising their holdings to 63%, rest being widely distributed among public. After conversion of PCD's into shares, the holding of Degussa is 68.25% and along with RAG, the total promoters holding is 73%

Insilco Limited has two state-of-the-art plants in India, located at Gajraula, U.P. (110 km. north east of Delhi) and Patalganga, Maharashtra (75 km. south east of Mumbai).

Gajraula plant started commercial production on 1st January 1993 and Insilco acquired Patalganga plant in September 1999. Insilco produces different grades of silica, catering to the requirement of customers in rubber and non-rubber segments. Its main customers comprise of, companies manufacturing tyres, rice hulling rollers, footwear, mechanical rubber goods in rubber segment, while plant protection, feed, food, detergents, battery separators and toothpaste customers fall under the non-rubber segment.

Insilco is the only silica company in India having an in-house production of sodium silicate, a critical intermediate in the process. 

Both Gajraula & Patalganga plants are ISO-9001:2000 and ISO 14001:1996 certified. 

Insilco is fully equipped to provide technical services to customers, in all the segments, with a backup support available from Degussa AG. Insilco has well equipped product testing labs at both plants. Besides this special application labs are there at Patalganga in the field of rubber application and agro application.

The Sales and Marketing of Insilco’s products are handled through Degussa India Pvt. Ltd., having headquarters in Mumbai and regional offices in Delhi, Mumbai, Pune, Chennai and Kolkata.