The Concrete Sealer X-2 product manufactured and distributed by Stone Technologies is a high quality concrete sealer. It is a water-based sodium silicate sealer that features a low volatile organic content that is compliant with most strict state regulations (though be sure to check the requirements for your particular state before purchasing any product). The Concrete Sealer X-2 is an environmentally friendly and well reviewed product that offers a solid level of protection.
The only problem with the Concrete Sealer X-2 comes with its marketing on the website. On the site, the Concrete Sealer X-2 is purported to be an excellent concrete sealer for those looking to seal exceptionally porous materials like brick and concrete block. However, sodium silicates are penetrating sealers that do not work on extremely porous materials. Their small particles are meant to penetrate the equally small surface pores on traditional slabs of concrete. If a sodium silicate sealer were to be applied to a porous concrete, as is advised on the website, the solution would simply leak right through the concrete without chemically reacting (which is where the sodium silicate features most of its strength and protection).
The Concrete Sealer X-2 is a great concrete sealing product for any projects requiring a strong penetrating solution; however, it is not the best choice for more porous concrete.
