
Shop STI Stopper call point covers and protective products for UK installers, from Stopper II and Universal Stopper covers to Exit Stopper door alarms, Steel Web Stopper guards and detector cages. STI part numbers are shown in product titles to help you match parts.
STI Ranges We Stock
- Call point covers: Stopper II and Weather Stopper II, Universal Stopper, Euro Stopper, Call Point Stopper and Enviro Stopper, in flush and surface versions with or without a sounder.
- Exit Stopper door alarms: the STI-6400 for single doors and STI-6402 for double doors, plus spare keys.
- Guards and cages: Steel Web Stopper wire guards, a motion detector cage, a beacon and sounder cage and a guard for photoelectric smoke detectors.
- ReSet call points and accessories: RP-RD2-01 and waterproof WRP2 call points, reset keys, break seals, spacers and a key box. Compare other manual call points.
Choosing an STI Cover
Match the mounting to the call point: flush covers for flush call points, surface covers with a spacer for surface back boxes. Sounder models give a local alarm when the cover is lifted, which deters malicious use. For outdoor or damp areas choose Weather Stopper II or Enviro Stopper. Check the cover dimensions against your call point before ordering.
Why Buy STI from JEM Systems UK
- JEM Systems UK is an authorised UK distributor of STI, supplying genuine STI products, all brand new and factory sealed, to trade installers across the UK.
- Around 40 STI products, including spare keys, seals and spacers.
- Fast, tracked UK delivery, next working day on UK mainland orders placed before 2pm, subject to stock.
STI Stopper FAQs
What is an STI Stopper?
A hinged polycarbonate cover from Safety Technology International that fits over a manual call point to help prevent accidental or malicious activation while leaving it usable in an emergency.
Does a call point cover stop the call point working?
No. The cover lifts to give access to the call point. Agree cover use with whoever is responsible for the fire alarm system.
How loud is the Exit Stopper?
The STI-6400 gives a 95/105 dB alarm and runs on a 9V battery, with a 12/24VDC connection option.


























































