It was in 1927 when Antonio Balconi, after having studied at the Politecnico University of Milan and obtaining his degree in 1912 at the University of Pavia, an enthusiast of electro-technology, realized there was no specific market for electro-insulators nor were there ready-for-use dielectric materials for specific electrical equipment and designed to meet various industrial needs.
It was then that he founded a company dedicated to the manufacturing and distribution of electrical materials. Fabbrica Isolanti Elettrici Balconi, which still today with its four generations of experience, continues to produce strictly “Made in Italy” products at its historic site in Vimercate in Brianza, Italy. The Company is specialized in the production of flexible insulating sleeves made of braided fiberglass or insulated with silicone, synthetic resins, acrylics, extruded silicone and PVC tubes, cords, ropes, extensible sleeves which are used in areas where extreme temperature resistance is required.
The Company offers a wide range of standard products, readily available even in minimum quantities. They can also satisfy all necessities by producing according to their clients’ specific requirements thanks to their very flexible production lines.
Technology and Services for Certified Quality
Over the years, in order to quickly satisfy all customer requirements, we have had to build internal facilities for manufacturing and treating of the braided sleeves and for the preparation of various resins to impregnate and coat the same according to their thickness.
Our Testing and Analysis Laboratory is equipped with all the certified equipment necessary to check the compliance of our products with the specifications required by the reference standards (CEI EN – UL). We can guarantee an ongoing process of control and evaluation of the quality of our products together with the optimization of our production processes, as well as for the testing of new materials destined to be introduced.
On site, we cut all our fiberglass sleeves and tubes to the specific sizes required by our customers.
- All products comply with RoHS3 Directive and subsequent amendments.
- We hold UL Certificate No. E317429 for “Dolph” Insulation Systems.

We have been awarded IMQ Certification for the self-extinguishing fiberglass-silicone insulating sleeve T.V.E. 19.70:
CA01.00179 T.V.E. KV 4
CA01.00178 T.V.E. KV 2.5
CA01.00177 T.V.E. KV 1.5
The IMQ Certification represents the visible guarantee for Public Authorities, Customs and Purchasers that the product has been subjected – by an external organization – to all the tests necessary to verify its compliance with the safety requirements of European regulations and that the entire production process is subject to constant monitoring.

The long standing tradition of Fabbrica Isolanti Elettrici Balconi S.r.l., symbol of guarantee and reliability, offers valid technical expertise capable of solving any electrical and thermal insulation issue.