The archive contains 4 textures (PNG) Base color, Roughness, Normal, Height (4096). There is also a plane (1 polygon) FBX model. There is material for Substance Painter. I took a screenshot to show what settings are in the material.. You can remove drops and sand from the material..
substance designer 13.0
SBS (Substance Designer, filesize: 38.6 MB), SPP (Substance Painter, filesize: 38.6 MB), FBX (Autodesk FBX, filesize: 38.6 MB)