Product images are provided for reference and may not represent the exact model, configuration, or included components.

No Bots, Just Experts

Questions about this product? Free pre-sales support from a senior specialist — product questions, compatibility checks, BOM quotes, price confirmation — typically answered within one business day. Need camera placement or system design work? Engineering time is $175 per hour (qty 1 = 1 hour). Hardware buyers get up to one hour ($175) credited back on their order.

Description

STI STI-8100 Smoke Detector Damage Stopper Flush Mount Strike

Overview

The STI-8100 is a polycarbonate flush mount strike designed to protect existing smoke detectors and door hardware from vandalism and damage in commercial security installations. The clear polycarbonate construction maintains visibility of the protected component while blocking access — slots are engineered too small for even a pencil to pass through. Install this where severe vandalism is occurring or anticipated on detector mounting surfaces or strike hardware in access control door frames.

Compatibility

The STI-8100 fits existing smoke detector installations in flush or surface mount configurations with exposed conduit. Compatible with standard door frame applications where strike protection is required. An optional STI-8170 backplate is available for unstable mounting surfaces to ensure suitable protection and load distribution.

Installation Notes

The STI-8100 mounts directly over existing smoke detectors or strike hardware with minimal footprint. STI recommends the STI-8170 backplate for installations on fragile or uneven mounting surfaces to prevent flex and ensure durability. The clear design allows visual inspection without removal, simplifying maintenance and service checks on protected detectors.

What's in the Box

  • 1x STI-8100 polycarbonate detector stopper (clear)
  • Mounting hardware as specified for flush installation
Specifications
Product Type: Lock/Strike
Strike Type: Flush Mount
Type: Damage Stopper Flush Mount Strike
Weight: 3.45 lbs
Dimensions: 22.8 x 22.6 x 4.6 in
Mount Type: Flush Mount
Warranty: Manufacturer Warranty
Package Contents: tamper-resistant fasteners for added; Easy installation and easy removal
Analytics: Smoke Detection
Compatible Accessories: 2.75 in.
Compatible_Accessories: 2.75 in.
Compatible With: security
Form Factor: Mount
Strike_Type: Flush mount damage stopper
Product_Type: Polycarbonate protective strike
Q&A
Reviews
Have Questions?

STI STI-8100 Smoke Detector Damage Stopper Flush Mount Strike

$35.35
$21.99

RELATED PRODUCTS

Save $14.31
STI STI-8100-BK Smoke Detector Damage Stopper Flush Mount
Add to Cart The item has been added

STI STI-8100-BK

STI STI-8100-BK Smoke Detector Damage Stopper Flush Mount

Flush-mount smoke detector enclosure with TCP/IP monitoring for secure access environments

  • TCP/IP-enabled remote monitoring integrates with building management and security systems
  • Flush mount design fits standard smoke detector installations without surface protrusion
  • Tamper-resistant fasteners included; simple installation and removal for maintenance access
Free shipping over $499
$37.30 $22.99 Save $14.31
The item has been added Add to quote
$37.30 $22.99 Save $14.31
Save $14.31 Add to cart Add to quote
Save $14.31
STI STI-8100-W Smoke Detector Damage Stopper Flush Mount White
Add to Cart The item has been added

STI STI-8100-W

STI Smoke Detector Damage Stopper® - Flush Mount - STI-8100-W

Flush-mount polycarbonate protective enclosure designed to shield smoke detectors from accidental or intentional damage in commercial and

  • Flush-mount polycarbonate enclosure protects smoke detectors from physical damage.
  • Slot openings prevent pencil-sized obstructions while preserving airflow and optics.
  • White finish blends with standard ceilings; ships with tamper-resistant fasteners.
Free shipping over $499
$37.30 $22.99 Save $14.31
The item has been added Add to quote
$37.30 $22.99 Save $14.31
Save $14.31 Add to cart Add to quote
Save $39.41
STI STI-8200-SS Smoke Detector Damage Stopper®, Flush Mount - Stainless Steel
Add to Cart The item has been added

STI STI-8200-SS

STI Smoke Detector Damage Stopper® Flush Mount - - STI-8200-SS

Flush-mount protective cage built from 18-gauge (1.2mm) stainless steel, designed to shield smoke detectors from vandalism and misuse without

  • 18-gauge stainless steel construction resists corrosion in harsh or food-service environments.
  • Perforated cage slots block pencil access, meeting correctional and healthcare tamper standards.
  • 4-point flush mount installs over existing detectors using basic hand tools—no wiring required.
Free shipping over $499
$103.40 $63.99 Save $39.41
The item has been added Add to quote
$103.40 $63.99 Save $39.41
Save $39.41 Add to cart Add to quote
Save $27.51
STI STI-8200-W Smoke Detector Damage Stopper®, Flush Mount - White Coated Steel
Add to Cart The item has been added

STI STI-8200-W

STI Smoke Detector Damage Stopper® Flush Mount - - STI-8200-W

Flush-mount protective cage constructed from 16-gauge white coated cold-rolled steel designed to shield smoke detectors from physical damage and

  • 16-gauge cold-rolled steel cage resists physical damage and tampering in high-vandalism sites.
  • Perforated matrix blocks pencil-sized intrusions while allowing full smoke reach to detector.
  • Tool-free flush or surface mount over existing detectors; four-point fastening for quick access.
Free shipping over $499
$70.50 $42.99 Save $27.51
The item has been added Add to quote
$70.50 $42.99 Save $27.51
Save $27.51 Add to cart Add to quote
Save $0.80
STI STI-9621 Motion Detector Damage Stopper Strike
Add to Cart The item has been added

STI STI-9621

STI STI-9621 Motion Detector Damage Stopper Strike

Motion-integrated damage stopper strike for high-impact access control

  • Integrated motion detection eliminates a separate sensor, cutting wiring runs and labor.
  • Damage stopper strike geometry shields door frame hardware in high-impact environments.
  • Wall and corner mount options support flexible deployment in retrofit or new installations.
Free shipping over $499
$50.79 $49.99 Save $0.80
The item has been added Add to quote
$50.79 $49.99 Save $0.80
Save $0.80 Add to cart Add to quote

System Design, Deployment & Technical Support

Support services and planning resources for commercial surveillance, access control, and infrastructure deployments.

Fixed scope • Fixed price

System Design Assistance

  • Get help validating product compatibility
  • Coverage requirements
  • Storage planning and deployment architecture before you buy.
Request Design Help

Deployment & Configuration Support

  • Access fixed-scope support for rollout planning
  • User setup guidance
  • Migration and system standardization across single-site or multi-site deployments
View Support Services

Guides, Tools & Calculators

  • PoE requirements
  • Storage retention
  • Camera selection and deployment methodology
Open Technical Resources