The gable wall of my house was sand blasted and re-pointed a few years ago. The brickwork is Yorkshire stone brick, circa 1870.
The sand blasting has resulted in the stonework becoming porous, especially in the vicinity of the fireplaces, to a height of about 6 ft. The stonework is now friable.
I had the wall looked at by a local firm over a year ago who suggested coating it with a an acrylic polymer (emulsion) sealant after cleaning the friable stonework with a stiff brush. The chemical they recommended was something called Ultra Proof by a company called Timber Repair (
I have decided to do the work myself, but can't find much information on "Ultra Proof". The popular alternative seems to be Thompsons Water Seal, which is available from the local B&Q.
Is Thompsons Water Seal upto the job?
SR NG_786