Limestone patio - Problem with sealer

[CP55WHO]

Morning all, I have just had a new patio laid in black limestone. One half of the patio looks fine but about one half of the patio is left with what looks like sand over the slabs but we have not been able to move it with either brushing or jet washing. It seems to me that the builder did not allow the sealer to dry before applying the grout which is the dry, brush-in type and this has stuck to the sealer leaving the slabs with an appearance of sand all over them. Any ideas ? has anyone had this before ? should I try and strip the seal off and start again ?
Many thanks
Chris Phillips

[CP55WHO]

Morning all, I have just had a new patio laid in black limestone. One half of the patio looks fine but about one half of the patio is left with what looks like sand over the slabs but we have not been able to move it with either brushing or jet washing. It seems to me that the builder did not allow the sealer to dry before applying the grout which is the dry, brush-in type and this has stuck to the sealer leaving the slabs with an appearance of sand all over them. Any ideas ? has anyone had this before ? should I try and strip the seal off and start again ?
Many thanks
Chris Phillips

[higgness]

Put up a picture if you can

[Tony McC]

Seal and then joint with a dry brush-in type, possible the dreaded shite begining with a G?

None of this sounds good, so get the "builder" back to sort it.