Answer
What is the best jointing for a patio?
A quality slurry or brush-in compound suited to the paving, not cheap sand-and-cement.
In short
A good slurry or brush-in jointing compound, applied properly, gives a durable, weed-resistant joint that flexes slightly and sheds water. The right product depends on the paving and the joint width. Cheap sand-and-cement pointing cracks and lets weeds in; we use the right jointing for the material.
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