Abrasion Resistant Overcoating (ARO)

Abrasion Resistant Overcoating (ARO) is an optional sacrificial second layer in the FBE process that is designed to protect the FBE from impact and/or rock damage while still retaining mild flexibility.  Directional bores and road crossings are common examples of installations that require ARO to keep the anti-corrosion coating intact.  The ARO is applied immediately following the FBE application using a similar method but normally in a separate coating booth.  While the FBE is still in the gel state, the applied ARO powder forms a commingled layer with the FBE and ultimately a strong, durable and resistant outer shell, usually at a final thickness of 20 to 40 mils.