Caulking between Pool Coping and Deck

1,645 Views | 11 Replies | Last: 7 mo ago by fire09
ME92
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AG
Howdy,

The caulking between my pool's coping and the deck has deteriorated and is no longer able to keep out water and debris.

How do I remove the old caulking and apply new? What product should I use?

Thanks in advance!
Whoop Delecto
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AG
My pool dude used Deck-O-Seal
akaggie05
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I re-did mine a few months ago. Most of the old stuff pulled up cleanly like a rope, then I used a scraper to get all the remnants out. This was the original material installed from when the pool was built 4 years ago and there wasn't really a backer rod underneath except for a lot of sand, which isn't ideal since it doesn't compress very well to relieve stress.

I vacuumed out the top layer of sand and added a proper foam backer rod and set the joint depth at about a half inch, then used Sikaflex (from Home Depot, large caulk tubes) and sprinkled sand on top for texture. All it all it turned out really well.

Here's the product I used, took 4 tubes worth:

https://www.homedepot.com/pep/Sika-29-fl-oz-Sikaflex-Self-Leveling-Horizontal-Joint-Elastic-Polyurethane-Sealant-in-Sandstone-515282/207086489
Col. Steve Austin
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akaggie05 said:

I re-did mine a few months ago. Most of the old stuff pulled up cleanly like a rope, then I used a scraper to get all the remnants out. This was the original material installed from when the pool was built 4 years ago and there wasn't really a backer rod underneath except for a lot of sand, which isn't ideal since it doesn't compress very well to relieve stress.

I vacuumed out the top layer of sand and added a proper foam backer rod and set the joint depth at about a half inch, then used Sikaflex (from Home Depot, large caulk tubes) and sprinkled sand on top for texture. All it all it turned out really well.

Here's the product I used, took 4 tubes worth:

https://www.homedepot.com/pep/Sika-29-fl-oz-Sikaflex-Self-Leveling-Horizontal-Joint-Elastic-Polyurethane-Sealant-in-Sandstone-515282/207086489
This! Same stuff and process I used when I had a pool.
I am not the Six Million Dollar Man, but I might need that surgery. "We have the technology, we can rebuild him!"
Jetty
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AG
Silkaflex. We had our entire decking replaced last week and this is what they used on the joints. Looks great.
akaggie05
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AG
One word of caution with Sikaflex. Despite being dispensed out of a what looks like a caulk tube, it is NOT caulk and should not be tooled or touched at all after application. It's self leveling and very runny when applied. You also have to dam up any open ends of the joint, or it will spill out. Takes several days to cure completely. I did the job when my family (and dog) were out of town so that I was sure that it wouldn't get stepped on.
ME92
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AG
Howdy All,

Thanks for all of the advice.

I got it done. It's not the best job but it is functional. On the whole, it was a good learning experience.

If anyone looking for tips about this project finds this thread, here's my advice after you listen to all of the previous posters:

1. Drink plenty of water and hit the bathroom before you start applying the caulk. Once you start it is difficult to stop because the caulk just keeps flowing out of the tube.

2. Keep something next to you while you caulk to rest the caulking gun. I used an empty box from a twelve pack of coke. It will control the dribble from the tube so you can have that moment to reposition yourself or fix the caulking bed.

3. When you break the seal inside the caulking tube, you only need to poke it once. Don't expect to feel the same kind of resistance from the Sika seal as you do from a tube of standard silicon bathroom caulking.

4. Figure out how many tubes you think you'll need. Take that number and multiply it by at least 1.5. Now get that many tubes. Maybe add a few more, just to be safe. It is much easier to return unused caulk than run to Home Depot mid-caulking to get more. Twice.

5. Plan to take the rest of the day off after. This is more tiring than you think.

Happy swimming everybody!

ETA: 6. Have a bucket of very dry sand available to make dams if there are any low spots created by joints between coping tiles or expansion joints in the pool deck. I used play sand for this. I also made a dam in the joint at the very beginning so the caulk had something to self-level against. By the time I got all the way around the pool, the caulk had firmed up enough that I could gently brush away the sand dam and complete the job.
wcb
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AG
Sikaflex - would you use this on your driveway as well? I'm ignorant to this stuff. I was thinking the joints in our driveway had wood between them but whatever was there has disappeared over time. I've been wondering what to backfill them with and how to do it.

My pool is probably going to need it at some point as well. Great tips here, thanks.
Chris98
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AG
Personally, I think taping either side of the joint, using a non-sag sealant, and smoothing it with putty knife is the best look and a lot easier than using a self-leveler
cena05
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AG
Yes driveway as well, use backer rod / foam if too deep. Make sure you do it right the first time as I just redid mine last week after a few years and wish I had done a better job to begin with.
Whoop Delecto
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fire09
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Mastic - works great, make sure you backfill any voids with sand
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