Concrete is a porous material that forms a plurality of pores with evaporation of water during solidification. These pores make the interior of the concrete loose and the surface hardness is not high.

1. Free Ca(OH)2 produced during hydration does not contribute to the strength of the cement gel. 2. The volume of CaCO3 produced by carbonation expands, damaging the surface of the cement gel.

3. The excess pores in the concrete and the capillary holes left by the gas during the pouring will affect the strength of the concrete.

4. Cement powder particles that are not sufficiently hydrated gel do not contribute to strength.

5. Other impurities are harmful.Taking into account the above characteristics of concrete, Polyforte formed a two-component seal curing system.