Ratings may include incentivized customer reviews.
What Customers Are Saying
Customers overwhelmingly praise this backer rod for effectively filling gaps before caulking, with most reporting it saves sealant, creates professional-looking finishes, and improves insulation by blocking drafts. Reviewers consistently describe it as flexible, durable, and easy to cut, compress, and fit into tight spaces without special tools. Many highlight successful use around doors, windows, trim, flooring, and driveways. A few note the diameter may be slightly smaller than expected, though this rarely affects results. Overall, customers consider it an essential, reliable solution for quality caulking preparation.
Customer review summary generated by AI, including incentivized reviews.Multiple uses
Would RecommendWas able to use for sealing a gap on an exterior wall - snug and hopefully will stay and functional as intended
Molding
Would RecommendI bought this to use with my new flooring as stair nose molding. It is just what the Doctor ordered.
Verified Purchaser
Air Flow
Would RecommendHelped our door from leaking air around it, worked exactly as advertised.
Verified Purchaser
Gap filler
Would RecommendGreat at filling in uneven gaps. Allowed me to have a good base for caulking.i would use again.
Great uneven gap filler
Would RecommendThis helped to fill in uneven gaps and allow me to get a good caulk line. I have used these gap fillers a few times and find them very versatile.
Had some extra large openings, needed to fill voids, and covered with chalking grout. Looks GREAT!!!
Verified Purchaser
Great filler for deeper expansion joints
The gray color shows through a light color caulk. Otherwise, it does fill the gap.
I found that the gray color shows through the white caulk.
Verified Purchaser
Gap filler
Would RecommendThis worked great for a gap between sink and marble vanity.
Verified Purchaser
Backer Rod - Garage door insulation
Would RecommendWhen insulating my garage doors with 1 1/2' thick insulation, I used this backer rod on the low side to keep the insulation in the correct space for a secure fit. It compressed nicely to force the custom cut panel in, then expanded to eliminate movement. It was flexible enough to slide under the center braces, and the finished look was consistent across all panels. It worked great for this insulation project.
Easy to use
Would RecommendDoes the job easy to cut. It would be nice if it came in white.
Best backer rod I have ever purchased
Verified Purchaser