sandwich system running track Sandwich system provides good force reduction and is constructed on a cast in place basemt of rubber crumb applied with clear polyurethane binder, the base layer is sealed with a combination of micronised rubber and polyurethane, with a final toping of colored EPDM granules broadcast onto a flood coat of polyurethane compound.Material quantity consume:1 PU bottom binder for the base( both concrete and asphalt) 0.15Kg/M22 Use paver machine paving 10 MM thickness for the base 8Kg/ M2 SBR granule/M2 1.15Kg/M2 PU bottom binder/M2Proporation of SBR granule : binder=7:13 First paving PU 1:4 track material :1.5KG/M2 + Dust (2MM)Second paving PU 1:4 track material:2 KG/M2 ( 3 MM)5 Broadcast 2-4 MM EPDM granule .3 KG/M2

epdm sheet