Broadback wrote:

I need to extend a path sideways. I have place edging along side which
in places have left gaps. What is the best product to fill in with? I
think that standard mortar will be too weak, whereas concreted would not
go into the narrow gaps. Suggestions please.
`if the gaps are less than about 20mm I'd just use a stronger mortar mix
- 1:2 or 2:5. And put SBR in if that isn't strong enough.

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Roger Hayter