How to fill the gaps between concrete slabs to stop weeds?

[Makita]

Weeds are building up between backyard slabs. What kind of material should be used to fill the gaps?

[MitchellMc]

Hi @Makita,

I'd recommend you dig out the grass/weeds and any soil within those cracks and fill them up with Sikaflex 11FC. It's a flexible adhesive filler that's perfect for expansion gaps but will seal them so no weeds can grow.

Please let me know if you have any questions.

Mitchell