I had a call yesterday from a very experienced tiler saying he had put 5 coats of impregnating sealer on some stone he had laid in a new conservatory and it still wasn't beading. It wasn't Aqua Mix, LTP or our Pro Sealer but that makes no difference really. It was a sealer that is well known and performs reasonably well in tests we have done and would have done if used correctly.
The stone was a fairly porous Limestone and was 32M2! I asked how long he had left between coats and what he had applied the sealer with? His reply was he used a Paint Pad to apply and he had presealed before grouting and then put coat 2 on 24 hours after grouting starting at 9am and completed it by 10am and then he applied 3 more additional coats leaving 1-2 Hours between coats he did a final test at 4.30pm and it was still not beading and the stone was absorbing some water.
I was not surprised to hear any of this after his explanation but having applied literally 100's of gallons of sealer to Limestone the most coats I have ever applied is 3 and that was only in two instances. I find most limestones accept 2 coats only!
What do you think went wrong or he did wrong?
A Prize for the best most complete explanation!!!
Jamie CSUK NO YOU CAN'T ENTER!!!!
Kev Martin
Tiling Logistics Ltd