have a moisture resi stant coating and may have an adhesion promoting coating.
4.Supplemental Elements These shall be for wet weather retro-reflectivity and shall be used for thermoplastic and multi-component longitudinal line markings but shall not exhibit a characteristic of toxicity re ferenced in AASHTO M 247. The supplemental elements
shall be selected from the QPL of Pavement Marking Beads.
A Type C certification in accordance with 916 shall be furnished for the 130 supplemental elements.
Source: Indiana Standard Specifications, 2024 Edition. Pages 11–11 of 1,248.