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There's a kind of a gap between the asphalt and the garage which causes moisture to accumulate there.

Close up view of the gap between garage side wall and asphalt

View of the side wall

I'd like to seal that gap by making a tar joint:

https://www.homedepot.ca/en/home/p.sealant-asphalt-black-300ml.1000409856.html?autoSuggest=pip[

How should I proceed with this? Is it a complex job? Do I first need to clean the gap as much as possible? What do I need to watch out for? And so on.

Thanks in advance for your kind help.

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While the asphalt-base (tar) crack filler would probably work, it is also sticky and messy and will probably end up being ugly against your stucco/plaster wall.

I recommend a self-leveling flexible urethane filler, often sold as "concrete crack filler".

Either way, you will need to sweep out that crack as well as you can, then blast it clean with a stream of water from a hose, then let it dry thoroughly. Take your time when applying so you get a clean, nice looking, even bead.

  • Didn't do it yet so I didn't mark your answer as done/accepted. I'll come back in a few weeks :) – Jenia Ivanov May 24 '17 at 3:37
  • I have a follow up question: what will happen if there's rain the day I put the Polyurethane self-leveling filler? Apparently there might be bubbles forming. Is that very bad? If it is, then maybe I can cover the seal with something for a day? (We get a lot of quick, spontaneous deluge type of showers in the spring, Completely unpredictable) – Jenia Ivanov May 28 '17 at 6:34

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