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Engineered Products to Meet Specific Problems



Strong-Seal® Systems offers a complete family of cost-effective engineered products, specifically designed to rehabilitate municipal concrete and masonry structures and effectively stop inflow, infiltration and exfiltration. The Strong-Seal® System is a patented process (Patent Number B1 5,002,438).


Both are fiber-reinforced, spray-applied cementitious mortars. Both products fill all voids and achieve a mechanical and chemical bond to the existing substrate. The result, when spray-applied to a minimum 1/2-inch thickness, is an impervious monolithic liner with compressive and flexural strengths exceeding that of the original structure. The MS-2A product is the most cost-effective solution for stopping infiltration and restoring structural integrity, while the MS-2C product provides high early strengths and added corrosion protection in mild sulfide environments.


A pure fused calcium aluminate mortar, Strong-Seal® High Performance Mix also stops infiltration and restores structural integrity; however, it has been specifically designed for protection against microbiologically induced corrosion. Laboratory and field tests have proven that the unique mineralogy of Strong-Seal® High Performance Mix protects cement sewer structures from MIC attack by limiting the bacterial activity which in turn regulates biosulfuric acid production and the resulting pH level. Graph 2 illustrates the resulting weight loss of different cement-based products. As the pH evolves downward, Strong-Seal® High Performance Mix regulates microbial activity, providing maximum corrosion protection, while ordinary portland and silica fume cements exhibit ongoing corrosion, as the pH continues to evolve below 2.

The unique mineralogy of the Strong-Seal® products provides exceptional resistance to microbiologically induced corrosion.


Strong-Plug is a rapid-set (60 seconds), hand-applied cementitious product for stopping infiltrating water and making repairs which require high early strength. Strong-Plug may be applied in a dry form directly to minor infiltration or mixed with water to a thicker consistency for application to more active leaks.


Strong-Seal® QSR is a rapid-set (10-15 minutes), high early strength, acid-resistant, hand-mixed and hand-applied, calcium aluminate based cement product for filling voids and repairing inverts in concrete, brick or other masonry-constructed structures.


Customized grouts for filling abandoned manholes and pipes, as well as stabilizing voids in soil outside these structures are also a part of the Strong-Seal® family of products.

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