Mica-coated electrically insulating and fire-proofing adhesive tape especially suitable for electrical or optical fiber cable

An electrically insulating and fire-proof adhesive tape especially for use with electrical cable and optical fiber cable, the tape comprising:

• a first layer having an inner side and an outer side, the first layer including at least one sheet of mica paper;
• a backing layer disposed on the outer side of the first layer, the backing layer including at least one reinforcing sheet;
• a binder bonding the backing layer to the outer side of the first layer, the binder comprising a polysiloxane resin containing a hardening catalyst additive;
• and
• an adhesive layer bonded to the inner side of the first layer, the adhesive layer comprising an exposed pressure-sensitive adhesive coating of a hardenable silicone resin without a hardening additive, such that the coating is capable of retaining pressure-sensitive adhesivity over a long time.