STI will be closed from December 24th – 26th and December 31st – January 2nd. Normal business hours will resume on January 5th, 2026.
Fire Enclosures
Covers designed to protect against false fire alarms without restricting legitimate operation.
Universal Stopper® Fire Alarm Covers
Helps Prevent False Fire AlarmsFeatures: 
Colors:
Stopper II®
Helps Prevent False Fire AlarmsProducts:21
Features:
Colors:
Weather Stopper®
Helps Prevent False Fire AlarmsProducts:21
Features: 
Colors:
Fire Environmental Enclosures
Helps Prevent False Fire AlarmsProducts:5
Features: 
Colors:
Break Glass Stopper®
Helps Prevent Wrongful UseProducts:19
Colors:
Euro Stopper® Multi Kit
Helps Prevent False Fire AlarmsProduct:1
Features:
Colors:
Call Point Stopper®
Helps Prevent False Fire AlarmsProducts:12
Colors: