Model # EXP04050

Internet #203151902

Store SKU #582318

Reflectix 4 in. x 50 ft. Expansion Joint for Concrete
0716511560017

Reflectix

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
$1698 /each

Frequently Bought Together

Product Overview

The reflected 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 planned.

  • Lightweight - over 11 times lighter than traditional products
  • Sturdy - will not prematurely break during job site handling
  • Resistant to moisture - virtually zero water absorption
  • Termite resistant - does not facilitate destructive termites
  • Recyclable - foam is made of recyclable resins
  • Environmentally-friendly - material is CFC and HCFC-free
  • Temperature-friendly - excellent range for cold or hot climates
  • 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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Specifications

Dimensions

Details

Warranty / Certifications

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Customer Questions & Answers

Can I get a 1" wide recycled rubber expansion joint

I have a gap 1" WIDE BETWEEN MY SIDE WALK & HOUSE. I WANT A FILLER THAT WLL LAST FOR YEARS AND THE RECYCLED RUBBER EXPANSION JOINT LOOKS TO BE A GOOD FIT. CAN I GET IT IN 1' THICKNESS?
Asked by: BJH
For this width, I used the standard 5/8" pipe insulation at $1.75 per 6 ft.
Answered by: Thrifty
Date published: 2016-10-09

Do you have to caulk over this? How wide is it? My joints look to be about 1" wide on my patio/pool surround.

Asked by: Donna
Thank you for your interest in our product. Yes, it is recommended to caulk over the product to hold it in place. The expansion joint product is 1/2" thick.
Answered by: Reflectix Product Support
Date published: 2016-04-06

What is the shipping weight of this roll?

What is the shipping weight of this roll?
Asked by: Karen
1 roll is 2 lbs
Answered by: Reflectix Product Support
Date published: 2017-04-13

Can I use a spray adhesive after installation instead of caulk? Here is a picture I the area I n...

Can I use a spray adhesive after installation instead of caulk? Here is a picture I the area I need to seal. I plan to install the joint with the tear-off strip down and use the adhesive to keep it in place. Will this work?
Asked by: Dee
Yes you can. The caulk is for when you use the product with the strip up then remove the strip and caulk to make it water resistant.
Answered by: Reflectix Product Support
Date published: 2017-01-04
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Customer Reviews

4 in. x 50 ft. Expansion Joint for Concrete is rated 4.2 out of 5 by 25.
Rated 2 out of 5 by from Eh...cheap appearing product. Some kind of foam rubber type of thing. It can fill small gaps. Hav... Eh...cheap appearing product. Some kind of foam rubber type of thing. It can fill small gaps. Have no idea how long this will last which is my chief concern. Seems like it will fall apart quickly. It's not like the expansion joint material you seen in driveways, etc. No HD people around that knew about it to answer questions.
Date published: 2017-03-07
Rated 5 out of 5 by from easy to use and install. I just used a little bit of mastic every couple feet along the block wa... easy to use and install. I just used a little bit of mastic every couple feet along the block wall at the base to stick it against the block and it stayed in place during the concrete slab pour
Date published: 2017-06-13
Rated 4 out of 5 by from Inexpensive alternative For a home project, this is a much cheaper alternative for a limited budget
Date published: 2017-02-14
Rated 5 out of 5 by from Fantastic product, saves time at end of job, no trimming of expansion!!! Fantastic product, saves time at end of job, no trimming of expansion!!!
Date published: 2017-05-30
Rated 4 out of 5 by from 4 Star Review Rating provided by a verified purchaser
Date published: 2017-05-20
Rated 5 out of 5 by from Easy to use will buy again ... Easy to use will buy again
Date published: 2017-04-18
Rated 5 out of 5 by from Great expansion joint material, take care with tear off strip. This foam Expansion Joint material is easy to apply, works well and provides a very good joint. It does need to be held in place for a while after it is glued with construction adhesive, otherwise it will sag. Being able to use with the tear off strip on bottom was better than on top for my use anyway. On top it seems it can be easy for the tear off strip to get accidentally removed or separated during screeding and finishing operations.
Date published: 2016-09-06
Rated 4 out of 5 by from 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.
Date published: 2016-09-08
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