Quote:
Originally Posted by rusnak
Maybe post a pic, so we can see how big the gaps are between the stones? Different products will fill better than others.
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Yes. If the sidewalk is laid tight, and you want to match it, and the stone is reasonably uniform in thickness, you would likely lay it like tile on exterior rated thinset, and brush in an epoxy sand.
If you are laying it 'old school' with joints, you'd set them in mud. Keep it 'loose' to help with levelling.
If you want it to last, clean, prime the old cement with a bonding agent, and do a scratch coat.
When I started working for dad(my father and grandfather were masons) there were few choices. Portland, sand, lime(every mason had a favorite recipe) and add stone for concrete.