Soft, flexible concrete gap filler

[JHZR2]

Ivd been wondering for a long while what this stuff might be. Just saw a new application of some of it around some sidewalk panels. No idea what it is, but it seems to smooth and level well, take up big. Gaps, and stay soft/flexible.

Any ideas??

 

[cmorr]

Lot's of expansion joint fillers, caulk ,etc some products are semi rigid in coils you just hammer in

If it came in a coil and melted in with heat it may have been this (my contractor used it on the joint between a rear patio and our foundation

Crack-stix

 

[spackard]

Don't know about this stuff, but several years back I looked into what Caltrans uses for their freeway repairs. There's an offramp into Pasadena that the local city fixit crew was repairing and they were re-doing it every year, but large potholes would come back in 3 months. After awhile hubcaps would pop off wheels, rims would get bent, and a few people parked cars with flat tires.

I filled out a Caltrans web form asking them to repair it. A few months later I got a reply, then they came out and filled them in with their pookie. That stuff lasted for years, until the local fixit crew finally re-asphalted their street.

I seem to remember the Caltrans stuff was several hundred dollars for a few gallons, which sounded outrageous, but it cured fast and lasted a very long time, so I thought about it awhile and decided the total cost of the repair to all concerned probably made it cheaper overall than the cost of the pail.

The Caltrans stuff is close to the color of concrete, maybe more tan or brown a little.

http://www.dot.ca.gov/hq/esc/approved_products_list/pdf/precast_repair_material_port_cem.pdf

Probably Sikadur 32. That's $394 for 4 gallons.

 

[tom slick]

Sikaflex makes a concrete repair that looks like that

 

[SnPb]

Like Tom said. I purchased a Polysulfide based concrete crack sealer made by Sika from Home Depot several years ago to fill the expansion joints in my garage floor. I recently tried to buy more and found that the Sikaflex currently sold by Home Depot is Polyurethane based. I haven't tried the Polyurethane yet, but the Polysulfide in my garage is still compliant.

 

[Shannow]

The one that I used years ago for sealing transformer bund walls was sikaflex T68 NS...their stuff is top quality.

They sell a foam "rope" backing, so that the adhesive only sticks to the sides, and you don't fill the whole crack (imagine a "v-notch crack, there is huge elasticity at the wide face, and minimal at the small face, the filler makes the sealer a membrane.

And primer to get the stuff to bond perfectly.

 

[Pop_Rivit]

That's Sikaflex SL.

 

[JHZR2]

Thanks all! Have seen this kind of stuff used in many places but never found someone to ask. I don't think I have any uses for it, but just in case, now I know.


...actually we have a small hole in our front concrete stairs at the corner of a stair riser where we had some yellow jackets a couple of years ago. Think I'll buy some and try it out.

 

[sleddriver]

Sikaflex sounds right. I've used leftover Sonneborn NP1 to fill in some smaller cracks. Might work well in larger cracks with backer rod.