Manufactured by Kryton, a well known name in the field of waterproofing materials, the Krystol T-1 is a surface waterproofer that is brushed onto the surface of the concrete in order to lock out water from entering from above. The Krystol T-1 is a cementitious product, meaning it is not a chemically reactive formula like a penetrating sealer. It is also not like an acrylic surface sealer, as it is instead made up of cement, simply providing another layer of concrete-like material to seal out moisture.
The product itself comes in a powder form, making it a little more technically difficult to apply than a liquid sealer. It is also more dangerous to apply, as inhalation of the powdered Portland cement could lead to serious health concerns. Ultimately, the Krystol T-1 is a product that is meant to be mixed with water, effectively making more cement above the concrete (cement is a material in concrete – the two terms are not technically interchangeable). The addition of more cement above the concrete theoretically helps block out water because the moisture has to travel through an extra layer.
The Krystol T-1 is a hazardous substance in states like Massachusetts and a workplace hazard in places like New Jersey and Pennsylvania. While not a bad choice for protecting your concrete, there are far better surface sealing options, such as epoxies and acrylics, which both offer more comprehensive protection without some of the risks.