Stone Matrix or SMA. SMA utilizes much more coarse stone in the combination being a binder, which resists rutting or deforming a lot more than other kinds. It creates a smoother and even more sturdy road surface but may be around 25% costlier for making. As proven With this cross-part, https://sealcoating-company87520.wikijournalist.com/4487572/5_simple_statements_about_sealcoating_explained