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Old 03-05-2009, 08:46 PM   #1
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Concrete Seam Seal


What type of caulk/seal is used to fill seams in driveway expansion joints and other concrete joints.

It doesn't look like the self leveling caulk, and appears more like an elastomer that bonds well, can be formed, and holds its shape well, unlike a self leveling type of caulk.
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Old 03-05-2009, 09:00 PM   #2
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Concrete Seam Seal


Sikadur?
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Old 03-05-2009, 09:29 PM   #3
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Concrete Seam Seal


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Sikadur?
Does Home Depot carry this?
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Old 03-05-2009, 10:04 PM   #4
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Concrete Seam Seal


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Does Home Depot carry this?
I know they carry Sikaflex, but I'm not sure if they carry the sikadur. Is there a reason you don't want to use the self leveling kind?
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Old 03-05-2009, 10:24 PM   #5
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Concrete Seam Seal


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I know they carry Sikaflex, but I'm not sure if they carry the sikadur. Is there a reason you don't want to use the self leveling kind?
If you have a seam/crack that's deep, then you may go through an entire tube of self leveling caulk before it fills the seam/crack. Also, self leveling caulk doesn't work well on the rise seam of concrete walk up stairs, and can be messy.
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Old 03-06-2009, 04:36 AM   #6
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Concrete Seam Seal


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If you have a seam/crack that's deep, then you may go through an entire tube of self leveling caulk before it fills the seam/crack. Also, self leveling caulk doesn't work well on the rise seam of concrete walk up stairs, and can be messy.
Maybe backer rod and the sikaflex for the horizontal seams? I guess you will need something a little stiffer for the vertical seams.
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Old 03-06-2009, 06:36 AM   #7
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Concrete Seam Seal


Use a urethane based caulk for masonry. Masonry absorbs moisture which will break the bond on most other types of caulk. For deep joints, use a non absorbing or closed cell foam backer rod. Then fill the joint on top of the rod. The caulk joint should not be deeper than the width. For wide joints thinner is better.

http://www.masterwall.com/files/mw14...lantdesign.pdf
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Old 03-06-2009, 07:45 AM   #8
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Concrete Seam Seal


we'd pick polyurethane, polysulfide, OR 100% silicone,,, the depth:width ratio should be on the container - if not, ck the website,,, silicone's not to be installed thicker'n 3/8",,, either closed or open cell backer rod should be used to form the sealant btm,,, you never want 3-sided adhesion.

clean the jnt walls 1st & be sure they're dry when sealing.
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Old 03-06-2009, 08:07 AM   #9
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Concrete Seam Seal


What do you have against the self leveling type. At least you do not have to tool it. I use Sonneborn's SL-1 one part elastomeric self leveling polyurethane sealant. And as posted you need a backer rod under the sealant to only bond to the two sides of the joint.
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