Expansion Putty?

Celtic

I have these gaps (expansion, I guess...I'm no mason) in my sidewalks. It irritates me that weeds will attempt to grow in these little spaces...debris moves in...etc.
Is there some sort of a putty/caulking material that can be used to fill these gaps in while allowing the concrete to expand/contract...AND w/o me having to apply it every year ?

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concretemasonry

Put in a backer rod so the top is below the sidewalk by at least 1/2 the joint width.

Caulk with a high quality caulk.

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Dick

Engineer, designer and consultant recently active domestically and internationally on construction and design in about 35 countries.

Celtic

Understood...no problem


I don't use caulk much in my trade...at home, it's just for around windows and when painting...and believe me, it's cheap.

What would be a high quality caulk for concrete?

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Tscarborough

NP1 is available nationwide and is very good. Search this forum for "joint detail" for a detailed explanation of the process.

firemike

Sika makes a high quality sealant (several in fact) such as Sikaflex Crack Fix or Sikaflex 1C SL. Pricey, but lasts.

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-Mike-

Celtic

Thanks guys!

I don't imagine (but what the hell do I know ) this stuff could be all that expensive ...but the trade off is no more weeds and crap and that is PRICELESS.

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