Hi, I have just had block paving laid for my back patio and I would like to seal just the area outside the patio doors (about 6m sq) and not all of it. Reason being is that when walking in and out of the house all the dust/kiln sand gets dragged into the house. I am thinking if it were sealed then it would be alot cleaner and less dustier around the patio doors. Appreciate any advise on sealers.....................