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Did you know?

Stopper II has been helping stop false fire alarms for over 30 years.

Stopper II


STI Products Work!
We used to average at least one false fire alarm a month. After installing the Stopper II we haven’t had one false alarm.

Ernest  Sawyer
Assistant Principal
Salem High School

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About STI

False fire alarms and the theft and vandalism of protection devices can be a serious issue, compromising safety as well as costing money.

STI has been producing safety technologies that stop false fire alarms and prevent theft and vandalism for thirty years. We now market more than 1000 products worldwide. Our range includes fire alarms protection devices, stopper covers and enclosures, wire guard protectors and security protection products.

Contact us now to discuss how we can solve your specific problems.

STI Stopper II

Wrong Button
for the Job?

3-in-1 Stopper® Station is the Solution
Coming Soon

    • One button, three operation choices
    • Housing offered in six colors
    • Optional illuminated insert
    • New high-tech logos, standard or custom
      text on shell
    • Four button inserts
    • Optional button sounder with transmitter
    • Multiple protective enclosures available

    • Find out more

Three Operations,
One Button

3-in-1 Stopper®Station
Coming Soon

    • Push button offers three operation choices
      for the price of one
    • User easily selects momentary, latching
      Turn-to-Reset or latching Key-to-Reset
    • Button housing offered in six colors
      with new high-tech logos or custom text
    • Push button inserts include: exit,
      push to exit, push or blank
    • Available with optional insert that illuminates
      red, green or white

    • Find out more

Protective Cover

Mount Directly to an Electrical Box

    • Mounts directly through product mounting
      plate to an electrical box
    • Included mounting frame eliminates the need
      to drill additional holes in the wall
    • Brother to the Bopper Stopper®
    • Hinged cover takes hard knocks in stride
      while helping to protect smaller-sized
      electrical units

    • Find out more

Protection for
Mini Smoke

Steel Web Stopper®

    • Protects against vandalism and damage
    • Constructed of 9-gauge coated steel wire
    • Fast and easy installation
    • Simple removal for servicing detector
    • Three year guarantee against breakage in
      normal use

    • learn more