The MRT System from I.S.T. Services includes an automated, high-pressure water/grit blasting unit for substrate preparation of manhole surfaces. The combined effect of high-pressure waterjetting and grit blasting with a working pressure of 7,500 psi results in quick and efficient substrate preparation. Appropriate substrate preparation is vital to enable proper application and bonding of mortar. The automated and controllable centrifugal spray unit can coat the interior manhole walls with both mortar and organic compounds. The extreme rotation speed provides compaction of mortar and an even application. The automated nature of the system eliminates the need for accessing the manhole directly and reduces completion speed drastically. 858-997-0004; www.shopistamerica.com.