Gala Shrink Fit - Sealing Tape

Gala Mastic Tape is a cold-applied butyl sealant made for use with heat shrink cable joint and termination kits. Applied under or between heat shrink parts, it fills gaps and seals against water and weather, so the finished joint or termination stays dry. It is supplied as pre-cut strips or as rolls on a silicone-coated paper liner.

Three grades do three jobs. Black mastic (HBMT) seals LV and MV joints and terminations, and is also used for sealing telecom installations. Red mastic (HRMT) gives a watertight seal on breakout boots, non-tracking tube and lugs in MV terminations. Yellow stress control mastic (HSCM) fills voids at connectors and screen cuts in MV joints and terminations to relieve electrical stress.

Black strips are 35 mm wide and 2.5 mm thick in lengths from 100 to 450 mm, with rolls from 0.6 m to 25 m. Red strips and rolls come in 20 to 50 mm widths, mostly 1.7 mm thick. Yellow comes in two strip sizes. Black and red typical values include a service temperature of -20 to +90 degC and minimum dielectric strength of 6 kV/mm (black) and 10 kV/mm (red).

Black and red mastic were screened by XRF at an external laboratory in April 2025, and cadmium, lead, mercury, chromium and bromine were not detected.

Buyers include cable jointers, contractors and accessory assemblers who need mastic for kits, repairs and spares.

Manufactured by Gala in India. Datasheet and size selection on request.