Concrete Expansion Joints: Keep them Watertight and
Keep Your Concrete Expansion Joint Watertight and Crack Resistant with Sikaflex Sealant. Gather all your old socks and a few worn-out T-shirts. You’ll need them as rags (don’t whine about using your old Pink Floyd concert shirt, nobody thinks you’re cool if you wear it to the mall in 2000 whatever.
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