Patent ID: 6572927
Filing Date: 2003-06-03
Classification: C04B,E04B

Abstract:
A method for sealing a porous building material comprising the steps of:feeding at least one low-viscosity reactive substance/substance mixture with a viscosity of less than 100 mPaÂ·s at 12Â° C. to the porous building material, whereby the substances/substance mixtures are based on epoxy resins consisting of solvent-free aliphatic, multifunctional reactive thinners and aminic aliphatic hardeners and/or polyurethane polymers with isocyanate contents of between 2 and 30 wt %; permitting said substance/substance mixture to penetrate the pore system of the porous building material in a desired zone of influence; and chemically reacting said substance/substance mixture which substantially fills the pore system, and thereby forms a liquid-impermeable barrier in the pore system.