Semi-rigid surface applied detectable warning

alerttile® is a glass reinforced thermoset composite engineered for superior impact resistance, slip resistance, wear resistance and long-term durability for retrofit applications. alerttile®‘s exclusive design incorporates a thin, slightly flexible profile with a perimeter beveled edge to provide a safe pedestrian transition.

Semi-rigid composition – 30,000 psi strength yet flexible enough to conform to ramp irregularities
Premium UV Treatment – ensures long term color retention
Proven Anchoring System – premium adhesive and HILTI HUD-1 anchors with stainless steel screws
Perimeter Beveled Edges – for safe pedestrian transition
AlertTile® Truncate Domes are designed to comply with ADA standards.

  1. Reinforced thermoset composite engineered for excellent wear and strength.
  2. Safety-speckled surface for additional slip resistance.
  3. Cross section of truncated dome showing dimensions.
  4. Perimeter beveled-edge provides safe transition for pedestrians.
  5. Innovative safety spars reinforce panel strength and increase traction for pedestrians.
  6. In-line domes spaced on exact 2.35″ centers (A.D.A. 4.29.2)
  7. Pre-drilled anchor holes speed installation.
  8. Exact required detectable warning length.
  9. Exact required detectable warning width.
  10. Premium Hilti HUD-1 anchors and stainless steel screws.


Available in five standard colors to meet a variety of situations and preferences: Yellow, Colonial Red, Brick Red, Black and Grey.



Colonial Red

Brick Red



Tiles are available in the following sizes: 2′ x 3′, 2′ x 4′, 2′ x 5, 3′ x 4′, 3′ x 5′.

2′ x 3′

2′ x 4′

2′ x 5′

3′ x 4′

3′ x 5′

alerttile® Detectable Warning Specification Sheet

Property ASTM Standard Result
Slip Resistance C 1028 Dry .93 / Wet .76
Impact Resistance D 256 8.0 Izod ft-ibs / in (notch)
Adhesion Bond Strength C 482 152 psi
UV Resistance – Fade Cap Y (LVR) Brick Red 5-15 Safety Yellow 25-50
Water Absorption 0.3 – 0.6%
Compression Strength D 695 30,000 psi
Flexural Strength D 790 18,000 psi
Tensile Strength 1/8″ D 638 9,000 psi
Color Integral Throughout Product Yes
Dome Height 0.2″ Yes
Dome Base Width 0.9″ Yes
Dome Top Diameter 0.45″ Yes
Dome Spacing 2.35″ Center-to-Center
UL Flammability UL 94 V-0 94V-0@3/32″
Flame Resistance Seconds
Ignition Time
Gurning Time
D-229 120
Flame Spread Index, 1/4″ E84 ‹25
Freeze-Thaw Durability C 1262-08 Pass

Some of the properties published are based on test performed on standard ASTM test sample and according to ASTM test methods on standard, unaltered GPO-3 materials. Value shown are for test samples made from standard GPO-3 production materials and they are believed to be conservative. Where specific or unusual applications are needed, test should be made on actual parts, and test procedures agreed upon between Cape Fear Systems, III. LLC and the customer. Please reference alerttile® and AlertCast® Warranty for specific warranty information. Please call for additional information and product specifications.