Sashco - 30381 Pre-Caulking Filler Rope Backer Rod Roll, 100' Length x 3/8" Width, Grey

I used this on cement driveway gaps and covered with self leveling caulk. I am pleased with the results.

Used to fill the lines in our concrete!! Worked excellent

I bought this online as none of the local hardware stores cares the 1/4 inch size. Better value also, as you pay less per foot. Did not need a100 ft but there is some in my supply cabinet now.

I've used a lot of backer rod for air sealing cracks. Sashco makes the best. If you need backer rod, this is the one to get. It's easy to use, easy to cut, and just the right mix of firm and smooshy. It does not have any distinguishable scent (no weird plastic odors). All in all, this is an excellent product. Whenever I need backer rod this is the stuff I want to buy.

Worked as designed.

Great for filling gaps before caulking-used outdoors for widow trim edging

Excellent product to fill in bottom wall gaps when installing new baseboards & shoe moldings in old houses.

If you have a wide gap to fill, and this backer rod isn't wide enough, you're probably going to be out of luck. Luckily the width was just right in my case. Not sure if there's anything else besides color that's different than what I ordered. That said, the rod color was supposed to be gray, but they sent me a black one. While the rod has been hidden underneath caulk, I only lowered the rating because I don't like ordering one thing and getting something else.

Product was as described. I used it to assist with flooring installation.

I used it inside the bottom seal of a garage door to puff it up and help prevent water and critters from entering. It worked just as I wanted.

I received the package in good order, and bag was sealed. It worked fine, but had to double/bend the rope a few times to ensure the thickness to fill the gap before caulking. Next time, I'll order a thicker rope!

well built

Works as expected