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190 Posts
Discussion Starter · #1 ·
I posted this question in the General DIY Discussion forum but really should have posted it here.

My driveway has gaps between the slabs that are in some cases up to 1” wide (see photo) and get a lot of grass growing up in them. I was thinking of putting some closed cell backer rods in the gaps and then caulking over the rods with self leveling sealant. Will this be the best way to full in the gaps or should I approach it differently? I’ve seen this filler at my local Home Depot and wonder it is what i need?

Sikaflex Self-Leveling Sealant, 10.1 fl. oz Cartridge, Gray
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