Endurable Concrete Hardener is nearly 100% pure silica at a size between 3 & 8 nanometers. The proprietary solution in which it is suspended, provides low surface tension, resulting in excellent penetration of the silica into the concrete. The reaction of the silica with the remaining unreacted calcium hydroxide in the concrete, forms calcium silica hydrate. When concrete is poured, calcium silica hydrate is formed as the concrete cures. This process only continues, as the concrete remains wet. After the concrete is dry, no additional calcium silica hydrate is formed and the top surface of the concrete is usually left with unreacted calcium hydroxide, also known as lime. Obviously, the first part of the concrete to dry is the surface, therefore leaving a substantial amount of unreacted calcium hydroxide. This unreacted calcium hydroxide is akin to an epoxy with only the first component used. The Endurable Concrete Hardener acts like the second component of the epoxy to actually create the chemical reaction, leaving the concrete harder and more abrasion-resistant.
Colloidal Silica is distinctive in its ability to bond to the silica already present in concrete and it can also bond to itself. This allows for a much greater density than can be found with any silicates. The families of silicates include sodiums, potassiums, and lithiums. None of these products can match the abilities of colloidal silica to bond with the silica in the concrete, nor can they bond to themselves.
Now that the superiority of colloidal silica over the silicate families has been established, one last question remains. What is the difference between colloidal silicas? This question is an important one when choosing your concrete hardener. The difference between colloidal silicas is how the silica is stabilized. The most effective way is lithium stabilization. Another method, and probably the most common, is sodium stabilization. This method is less expensive, therefore most colloidal silica concrete hardeners are sodium stabilized. The reason lithium stabilization is superior lies in the reaction of the silica when applied to concrete. Lithium stabilized colloidal silica produces more reaction points, yielding a harder concrete than the more common sodium stabilized colloidal silica.
When looking to choose the best hardener, one should look at the superior technology of colloidal silica over the other silicate families. Then one should look at the best technology of stabilization, which is lithium stabilized colloidal silica. The size of particle should also be considered. The smaller the particle size, the better the results as there are more reaction points and the product can travel further into the concrete at the smaller size. Endurable Concrete Hardener is a lithium stabilized colloidal silica with the smallest particle size available at 3 to 8 nanometers, making it the best choice for a concrete hardener.