Don't use the one parts like sika pave fix, they just don't last.
Use a proper sand and cement mortar. You can buy it pre blended with the right quantities of sand and cement and then mix it up to the desired consistancy with water.
Then trowel it in and compact and strike it with a jointing iron.
Check out paving expert . com for more information
I've just re-done my patio with Romex Rompox Easy and it was a doddle. No bending, no backache, no mess and it only took a couple of hours. It looks good and it's hardening very well 24 hrs on. I'm not at all handy with a trowel so thought I'd try it and I'm fairly chuffed with the results. The hardest part was the preparation - scraping out the previous failing sand/cement mix.
I think the purists will always recommend sand/cement and only time will tell how durable it is but I'm hopeful it will last long-term.
FYI - I got it from jointingmortar.co.uk - was the cheapest place I could find, not being in the trade.
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