Strong-Seal High Performance Mix from The Strong Co. is a pure-fused calcium aluminate mortar that stops infiltration, restores structural integrity and protects against microbiologically induced corrosion in sanitary sewer systems with harsh sulfide conditions (pH greater than 1.0). As the pH level of the structure evolves downward, this product regulates microbial activity, providing corrosion protection. It is reinforced with alkaline-resistant fiberglass. When spray applied to a minimum 1/2-inch thickness, it is intended to form a structural monolithic liner covering all interior substrate surfaces. When correctly applied, this material exceeds the compressive and flexural strength of the original structure. 800-982-8009; www.strongseal.com.