Waterproofing masonry with alkyl polysiloxanes

Claim 1

A METHOD OF WATERPROOFING POROUS MASONRY THAT COMPRISES APPLYING THERETO A VOLATILE SOLVENT SOLUTION CONTAINING FROM 5 TO 35% BY WEIGHT OF A SILOXANOL DERIVED BY THE COMPLETE HYDROLYSIS AND INCOMPLETE CONDENSATION OF A MIXTURE CONSISTING OF A MONO-ALKYL SILANE IN WHICH THREE HYDROLYZABLE GROUPS AND A SINGLE PRIMARY ALKYL RADICAL HAVING FROM 3 TO 9 CARBON ATOMS ARE ATTACHED TO SILICON AND OF A TETRAFUNCTIONAL SILANE HAVING 4 HYDROLYZABLE GROUPS ATTACHED TO SILICON, THE PROPORTIONS OF MONOALKYL AND TETRAFUNCTIONAL SILANES IN SAID MIXTURE BEING SUCH AS TO YIELD A SILOXANOL UPON HYDROLYSIS HAVING FROM 0.3 TO 0.9 PRIMARY ALKYL RADICALS PER SILICON ATOM AND NOT LESS THAN 30 PER CENT OF SAID SILICON ATOMS HAVING SUCH ALKYL RADICALS ATTACHED THERETO, SAID SOLUTION BEING APPLIED TO SAID MASONRY IN AMOUNTS RANGING FROM 25 TO 125 SQUARE FEET OF SURFACE PER GALLON OF SAID SOLUTION AND AIR DRYING.

Claim 2

A METHOD OF WATERPROOFING POROUS MASONRY THAT COMPRISES APPLYING THERETO A VOLATILE SOLVENT SOLUTION CONTAINING FROM 5 TO 35% BY WEIGHT OF A SILOXANOL DERIVED BY THE COMPLETE HYDROLYSIS AND INCOMPLETE CONDENSATION OF A MIXTURE CONSISTING OF A MONO-ALKYL SILANE IN WHICH THREE HYDROLYZABLE GROUPS AND A SINGLE PRIMARY ALKYL RADICAL HAVING FROM 3 TO 9 CARBON ATOMS ARE ATTACHED TO SILICON AND OF A TETRAFUNCTIONAL SILANE HAVING 4 HYDROLYZABLE GROUPS ATTACHED TO SILICON, THE PROPORTIONS OF MONOALKYL AND TETRAFUNCTIONAL SILANES IN SAID MIXTURE BEING SUCH AS TO YIELD A SILOXANOL UPON HYDROLYSIS HAVING FROM 0.3 TO 0.9 PRIMARY ALKYL RADICALS PER SILICON ATOM AND NOT LESS THAN 30 PER CENT OF SAID SILICON ATOMS HAVING SUCH ALKYL RADICALS ATTACHED THERETO, SAID SOLUTION BEING APPLIED TO SAID MASONRY IN AMOUNTS RANGING FROM 25 TO 125 SQUARE FEET OF SURFACE PER GALLON OF SAID SOLUTION AND AIR DRYING.