Your block paving can be sealed after it has been cleaned and the blocks are dry. We do this immediately after we have brushed in the kiln dried sand. We can only apply these products when the weather is warm and dry. Both sealants and joint stabilisers bind the jointing sand together and also to the sides of the blocks, which prevents weed growth.
Sealing of the blocks can either be in a mat or wet look finish which prevents the blocks from being stained.