Okay, I got myself confused...

I am looking to caulk the control joints in my driveway as they have all done their job and cracked. Well, except for a spot by the garage.


Picked up the Dewalt 20v angle grinder with a segmented diamond blade to cut out the loose concrete and make a more consisten groove.

Now I need the proper sealant.

I was looking at the Sikaflex self leveling sealant but it states that is is to be used on a level joint only. My driveway has an 6% pitch to it so I am now concerned that the Sikaflex will run downhill leaving no sealant at the top and a mess at the bottom.

Is there another decent Joint sealant that is still soft but won't run on an 6% slope?

A little more detail:
The driveway is 30 feet long
The control joints are 3/4" tooled joints. I don't want to fill the whole joint. Just want to grind a and fill the crack.

Thanks

I did this a couple of years ago after getting an estimate for THOUSANDS of dollars to hire someone to do it. I didn't grind them, just yanked out the loose. It failed somewhat after a couple of years, but is better than what it was. Maybe if I had grinded it that wouldn't have happened but we have pretty intense heating and cooling differences in Iowa.

The Sikaflex was awesome, but I have a pretty good pitch to my driveway as well and I could only use it on the horizontal joints, not the ones that run parallel with the slope. I found a much thicker product for that which worked good enough. If you try the Sikaflex on the downhill joint it will all just run out. Unfortunately I forgot what the other one was, maybe it wasn't self leveling, and I had to somewhat smooth it in there, but it didn't run.

After you clean out the joints, use foam backer rod and/or sand to fill in most of the joint and then put your sealant on top of that.

You don't have to use self leveling sealant. Just use the Sikaflex concrete fix amd tool it down with a spatula. Or anything non-sag polyurethane like Quikrete Non-sag.

I used Vulkem and Sikaflex self-leveling concrete caulk on some concrete driveway cracks. Some needed foam back, some didn't. A couple years later I found the Vulkem was fine but some of the Sikaflex had become detached from the concrete.

I'm not sure what 6% grade really looks like. But I have used the Silka Self leveling on my driveway and it does have a slope. No problems at all using it. You can always use the Silka caulk, or even the corded play doh like stuff, but you have to heat it up and it still works good.

Thanks for the info.

Sika makes great products but for your use, without a doubt my first choice would be West System 610. Or the crack stix in the appropriate size that comes in a rope shape that you heat with a torch to cure..... The West system is a 2 part gap filling pliable epoxy that mixes at the tip of the caulking gun and is thicker but can be tooled for a nice clean caulking line and specifically made for this (and a few other purposes).

West System:
https://www.westsystem.com/spe...ened-epoxy-adhesive/

Crack stix
https://www.homedepot.com/p/Cr...iller-2051/203658275

This message has been edited. Last edited by: jimmy123x,

BigJoe, here's a visual aid.