Issues cleaning up black limestone, although sealed.

[Jack Pettifer]

Laid around 30M of black limestone in garden, decided to prevent any issues to seal before slabs laid. all went down fine slight residue so cleaned away twice at the time went to bed, residue still strong as before. cleaning again each slab individually but still milky residue. Have tried pressure washer but is too close/powerful it takes off the sealant. should also mention it was sealed then re-sealed within 8 hours as recommended. how can i get them back to black? even if i have to reseal once more. not great, any help would be appreciated. Thanks.

 

[White Room]

What sealer and how long after laying did you seal.....

 

[DHTiling]

As above , need some more info plz.

 

[Jack Pettifer]

resiblock at least 10 days until laid. Slabs sealed before laid, twice. ta

 

[DHTiling]

Ok , so you it was sealed then laid.. how long after sealing was it cleaned / wetted.. ?

 

[White Room]

resiblock at least 10 days until laid. Slabs sealed before laid, twice. ta

I thought that was a block paving sealer...

 

[DHTiling]

I thought that was a block paving sealer...

Hence why i asked the above, it sounds like a topical type sealer.