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4 in. x 50 ft. Expansion Joint for Concrete

  • Lightweight - Over 11 times lighter than traditional products
  • Sturdy - Will not prematurely break during job site handling
  • Termite Resistant - Does not facilitate destructive termites
  • See More Details

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Product Overview

The Reflectix closed cell foam expansion joint is the solution to your concrete placement needs. It is durable, lightweight and flexible enough to shape to contours. The product includes a 0.5 in. x 0.5 in. tear-off strip for applications where caulking is specified.
  • Lightweight - over 11 times lighter than traditional products
  • Sturdy - will not prematurely break during job site handling
  • Resistant to moisture - virtually zero water absorption
  • Insect resistant - does not facilitate destructive termites
  • Sealant-friendly - works with a variety of common sealants
  • Recyclable - foam is made of recyclable resins
  • Environmentally-friendly - material is CFC and HCFC-free
  • Reusable - tear-off strip can be reused as a backer rod
  • Sealant friendly - works with a variety of common sealants

Info & Guides

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4 in. x 50 ft. Expansion Joint for Concrete
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BrandReflectix Trim-A-Slab
Name4 in. x 50 ft. Expansion Joint for Concrete3 in. Small Concrete Expansion Joint Sample Pack6 in. Large Sample Concrete Expansion Joint Pack
Price
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Specifications

Dimensions

Diameter (in.)
0 in
Product Length (ft.)
50 ft

Details

Returnable
90-Day

Warranty / Certifications

Manufacturer Warranty
Reflectix warrants its products to be free from material and workmanship defects.

Questions & Answers

34Questions25Answers

How will this perform against salt from splash water from a saltwater pool?

Asked by Salt December 31, 2020
1
Answer

I would not recommend Reflectix in this application.

What colors does it come in?

Asked by Kathy November 18, 2020
3
Answers

Black but you should seal it with joint filler which comes in other colors.

I concreting 12x5 ft porch. What would I use, if anything, between brick wall (on 3 sides) when I pour the concrete?

Asked by cate August 9, 2020
4
Answers

I used this for an interior slab and it worked great. I like that you can tear off the top 1/2” afterward and caulk the joint

Does it come in white?

Asked by Anthony June 13, 2020
1
Answer

We do not currently have this product in a white.

I have 2 inch wide existing expansion joints. I'm planning to fill with sand and then cut this st...

Asked by radkan June 12, 2020
1
Answer

Yes it will work as a filler.

Can this be used as backer rod for pool expansion joint?

Asked by Tuan October 12, 2019
1
Answer

Our product would not work in this application.

How do you install this joint between slabs that are already in place?

Asked by Homeowner September 29, 2019
4
Answers

the only way you would need to have a gap of at least the thickness of the reflectix between the slabs and then push it down in between the slabs and if its tight spray some type of lubricant between slabs

Will epoxy adhere to this?

Asked by John July 26, 2019
5
Answers

Yes but joint space should be too wide. Expansion joint expands out of space if too wide. I double expansion joint material in few spots and used joint filler compound to hold in place

When you use this material as a replacement for old deteriorated concrete expansion joints in you...

Asked by Lieu April 26, 2019
3
Answers

Yes, you can use the joint strips to fix the indoor garage wall or floor. Cut it to fit in the gaps.

can this be used on a pool deck?

Asked by les April 5, 2019
2
Answers

yes it is an exellent product to use for expansion joints

4 in. x 50 ft. Expansion Joint for Concrete - page 2

Customer Reviews

  • 4.4
    out of 122 reviews
  • 80% recommend this product
Filter by:
Showing 1-10 of 122 reviews
Fantastic product, saves time at end of job, no trimming of expansion!!!
Fantastic product, saves time at end of job, no trimming of expansion!!!
by Reilly
4 people found this helpful
Seems to be working as a joint material
About 10 years ago, I decided to pour concrete slabs beneath my canales. So the water that runs off the roof falls on a concrete slab. 10 years ago I used the asphaltic fibrous joint material between the concrete and the house. Most of it has deteriorated to the point that there is nothing left. I had several other canales that I never put a slab under, but decided to do that this summer and I also decided to build a sidewalk along a portion of the house, so I bought the foam to try out. See attached pictures of the foam joint material, which seems to work ok. You need to glue it to the surface, in my case the house,to keep it in place where as with the aliphatic fibrous material, it was much stiffer and did not have to be glued as much. The aliphatic material could get by with only 3 or 4 spot glues just to keep it from falling down while pouring the concrete. If you are going to screed off the foam material it needs to be continuously glued near the top so it doesn’t push down while using it as a screeding surface. One of the pros to the foam is it will easily go around a rounded corner. Again see picture. I also found that it is better to put a bead of caulking or glue material all along the top of the foam to keep concrete and aggregate from getting behind it, since it is so much more flexible than the other joint material. Con: The need for gluing and calking requires additional time to allow the glue and calking to dry good before doing the concrete work. 5-10 years from now, I will know if this new foam joint material holds up better or worse than the aliphatic fibrous material which I put many, many tubes of chalking on over the years to try and keep anything from getting between the concrete slab and the house, but ultimately the dirt, grass, weeds, moisture, snow and ice won that battle, due to the deterioration of that joint material. Hopefully this material will hold up better over time.
by juan
19 people found this helpful
Rating provided by a verified purchaser...
Rating provided by a verified purchaser
by HomeDepotCustomer
extremely easy to use....
extremely easy to use.
by MARK
by TINA
Had to return the product. Bought the wrong thing. I needed...
Had to return the product. Bought the wrong thing. I needed the 5 ft expansion boards. For our concrete project. That worked out great. Thank you
by Mary
Rating provided by a verified purchaser...
Rating provided by a verified purchaser
by HomeDepotCustomer
It was fine and easy to work with. It only...
It was fine and easy to work with. It only came in black. I wanted white.
by Lou
Rating provided by a verified purchaser...
Rating provided by a verified purchaser
by HomeDepotCustomer
Excellent product and and easy to install....
Excellent product and and easy to install.
by JAMES
Showing 1-10 of 122 reviews