T-18 methyl methacrylate polymer concrete is a fast-curing, thin, slurry overlay. It is a pre-packaged system ideal for concrete and steel bridge decks.Transpo’s T-18 is designed to be applied at 3/8” thickness which eliminates the need to relocate joints, end dams or drain structures. Installation of T-18 will add less than four pounds of dead load per square foot of surface area, an important consideration for rehabilitation of older structures.