The LiON Hard sealer manufactured by L&M Construction Chemicals is one of the few lithium silicate sealers on the market. A lithium silicate sealer is a penetrating sealer filled with small particles of silicate transported by lithium carriers suspended in water. These particles, when applied to the surface of a concrete slab, will penetrate through the tiny pores lining the surface to react chemically within the concrete. These chemical reations will dustproof, densify, and lock out water from the concrete, ensuring lasting longevity.

The LiON Hard sealer is a VOC free product, making it safe for both the environment and your own application. The harmful fumes that plague solvent-based products are not as much of a concern here, as the water-based nature of the LiON Hard sealer makes it a lower risk. It follows a typical regimen of application following the surface preparation, making it a relatively easy-to-apply formula.

While the LiON Hard is an excellent example of a lithium silicate sealer, the biggest problem is that it is not shipped in a concentrated form. Because the LiON Hard sealer is pre-mixed, you really cannot be sure of the ratios of silicate particles to water. With a concentrated product, it is easy to mix it yourself, thereby knowing for sure what the ratios are.