Crumbling or soft mortar joints and punky concrete are frequently the result or freeze/thaw cycling, and environmental conditions. Treating the deteriorated surface with a consolidant can be an economical alternative to replacing the deteriorating material.
Consolidants chemically react with calcium hydroxide resulting in a densification of the parent material. They will permanently improve deteriorating cementitious surfaces. The increase in density (lower porosity) provides an improved barrier to carbon dioxide, water and other contaminants.
Start is a water-based environmentally friendly consolidant.