Features:
The base mate of sandwich running track is popularly made of black SBR rubber crumb. After base mat is cured, top surface of EPDM and PU resin mixture is sprayed. The appearance of the finished is different from other types of in-situ systems : the full PU and sandwich system. The surface texture is porous or called permeable, which enhances the run-away of water. Although it is recognized that the spray coat system is less durable compared to the full PU and sandwich systems, the advantage of its porosity makes this system popular in rainy weather area.



In particularly high wear areas such as at the end of Javelin runways, at the High Jump take off point, and where the starting blocks are fixed, it is common to "reinforce" the surface with cast resin material, prior to spray applying the finishing coats. These systems probably comprise the most widely installed group of synthetic surfaces for athletics.

Spray Coat Running Track Layer Structure


Installation Process:
This system comprises a layer of rubber crumb formed base mat and a layer of surface spray coat. 
To install the base mat, the crumb is mixed with a one-component moisture-curing polyurethane resin in the correct proportions. This very viscous mix is then spread by paving machine on to the base of the track, with the thickness controlled by screed bars. After cure, two coats of a coloured polyurethane paint containing a fine rubber aggregate, is spray applied to this rubber base mat, in order to give the finished surface the correct traction and slip resistance.