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50 lb. Fast Set Concrete Mix

  • Rapid setting in approximately 30 minutes
  • For setting posts or concrete slabs over 2 in. thick
  • Foot traffic in 6 hours - vehicle traffic in 48 hours
  • See More Details

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Product Overview

Get quick concrete results with this Sakrete 80 lbs. Fast-Setting Concrete Mix. The fast-acting formula is perfect for pouring slabs and setting posts without any mixing or bracing. This mix sets in just 30 minutes.
  • Use for: setting posts, driveways, patios, stairs, ramps and walkways
  • For applications of at least 2 inches in thickness
  • Set posts and poles without bracing, blending or mixing
  • Can be used for walkways and slabs that require quick access after setting
  • High strength 4,000 psi
  • Yield: 0.38 cu. ft.
  • Learn more about concrete and cement here in our Buying Guide
  • Note: product availability may vary by store



Info & Guides

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Specifications

Dimensions

Coverage Area (cu. ft.)
0.38
Product Depth (in.)
17
Product Height (in.)
4.5
Product Length (in.)
14

Details

Color Family
Gray
Color/Finish
Gray
Compression Strength (psi)
4000
Concrete Mix Type
Rapid Setting
Features
Fast Setting
Material
Concrete
Max. Cure Time (Days)
28
Max. Set Time (Hours)
48.0 h
Min. Cure Time (Days)
3
Min. Set Time (Hours)
6.0 h
Product Weight (lb.)
50 lb
Use Location
Floor
Working Time (min.)
15

Warranty / Certifications

Manufacturer Warranty
n/a

Questions & Answers

108Questions32Answers

Can this be used in concrete Form Tubes (sonotubes)

Asked by AbeFroman May 1, 2021
2
Answers

Thank you for your question. Yes, this can this be used in concrete Form Tubes Hope that helps. Please contact us at 1-866-256-7404 if you have any other questions that we can resolve to your satisfaction.

Can I use the mix for deck post?

Asked by Jacks119 April 24, 2021
3
Answers

Thank you for your question. Yes. This product can be used for deck posts. Hope that helps. Please contact us at 1-866-256-7404 if you have any other questions that we can resolve to your satisfaction.

how many cubic ft per 50 pound bag

Asked by joe February 16, 2021
6
Answers

Thank you for your question. One bag of Fast Setting Concrete Mix covers .38 cubic feet. Please contact us at 1-866-256-7404 if there is any more information we can provide and resolve to your satisfaction.

I am installing a 12" round x 48" deep concrete tube to set an antenna in. I want to know the bes...

Asked by Steve February 11, 2021
2
Answers

I’ve use skaters on every project. I like using 2 bags for better stability . I have farm animals so they need to be super strong. Best advice is to let it set 48 hours or mire for the concrete to set. Too early amd you may not have the best support. Also add water a little at a time until your get the right consistency.

Can I use this under a cement backer board? In other words before it gets hard and before I lay d...

Asked by Al January 29, 2021
2
Answers

Thank you for your question. Oldcastle strives to provide the best possible products and customer experience. Please contact us at 1-866-256-7404 so we may gather more information and resolve to your satisfaction.

For fence post holes - if it is freezing, can I set this concrete with warm water? Look for tips ...

Asked by SteveVA January 11, 2021
5
Answers

As long as your water it’s not frozen you can still set that concrete once you fill the hole with sakrete followed by water you can use warm water there is only a few minutes to stir the cement inside the hole for best results always read the instructions indicated at the label hopefully this will help you good luck to your project.

can it be used for small footings for a deck

Asked by FT November 17, 2020
3
Answers

Yes, it can

I removed a cast iron toilet flange revealing a 3 inch deep 1.5 inch wide area of cement in the s...

Asked by DIYGUY November 15, 2020
3
Answers

This can work for that job although 1.5" is a bit thin of an application. Concrete repair can work as well and would be easier to work with.

if I was to use this for a slab, how many sq ft does one bag do at 2 inches thick?

Asked by dblR October 28, 2020
3
Answers

So for 2” inch thickness 50lb will be enough for about 3.3 Sqft.

How many bags i need for 170 sq f floor about 2” to 3” thick?

Asked by Sd September 29, 2020
3
Answers

For every inch of thickness you will need about 25 bags of 50lb. So if you have to do 2” thick, you will need 50 bags. And if it’s 3” you will need about 75 bags.

50 lb. Fast Set Concrete Mix - page 2

Customer Reviews

  • 4.7
    out of 771 reviews
  • 93% recommend this product
Filter by:
Showing 1-10 of 771 reviews
I needed it to set a umbrella clothes line in a big container so I could have it on my upstairs d...
I needed it to set a umbrella clothes line in a big container so I could have it on my upstairs deck. I was a little confused on how much water to use. I like to have instructions like so may quarts water to bag. But it was not that clear. I called the company and a associate told me exactly how much water for a bag. I had 3 bags worked great. PS I'm a 70 year old woman. If I can use it anyone can. Only needed nephew to carry bags upstairs.
by Jobanana
This concrete is great for setting post-holes; I needed something that was easy to mix and set qu...
This concrete is great for setting post-holes; I needed something that was easy to mix and set quickly. It is also very strong when it cures. Once mixed with water, the concrete sets in about 30 minutes. I used this concrete when the ground and air were in the mid-40 degree range so I had a little extra time before it set. If it is warmer, you will have less time. You can mix this concrete between 40 and 90 degrees and minimum thickness is 2" for strength. I dug my post holes with an 8" auger (8" wide hole) and, with the post inserted, found I needed one 50 lbs bag per foot in depth of the hole. Most holes were 2 feet deep and needed 2 bags per hole. This mix can also be used for footings, concrete repair and slabs/sidewalks. I also like the 50 lbs. weight of the bag, it is much more manageable to carry around than an 80 lbs. bag. Mixing is easy, I set and braced my post all plumb, filled the hole with 1/3 water (I used warm water since it was cold out) then I poured in mix until the water rose the top of the hole. I then used a thin piece of scrap wood and pushed it through the mix until water was absorbed. I then added more concrete and mixed until the hole was full. The only problem I ran into was as the hole filled, the last few inches were hard to mix as water was pouring away from the hole. I had to add a little concrete and water until it was mixed right. I then used a trowel to slope the concrete up towards the post on all four sides (so water doesn't puddle around the post and rot it faster). Within 30 minutes after I finished, the mix was hard. I then placed a trash bag around the concrete to aid in curing and help keep it warm as night time temps dropped below freezing. I then waited 24-48 hours to put the fence on. Of note, since it reached freezing at night, I kept my concrete bags inside where it was warm which helps aid in curing.
by SteveVA
1 person found this helpful
Price is right - gives you enough work time before...
Price is right - gives you enough work time before setting - I usually add cement - nice finish - occasional bag w clumps but usually fine
by HomeDepotCustomer
very nice to handle and is very fast to set, yes i will buy it again
very nice to handle and is very fast to set, yes i will buy it again
by Luis
1 person found this helpful
I used this to set our mailbox, it worked great and was easier to use than I expected!
I used this to set our mailbox, it worked great and was easier to use than I expected!
by DJ
Used it to set fence posts. It worked great.
Used it to set fence posts. It worked great.
by Judy
Just as stated. Sets quick. Very helpful for small projects that you have no help on to offset al...
Just as stated. Sets quick. Very helpful for small projects that you have no help on to offset allot of bracing and waiting
by Pergolaguy
Excellent product - fastest way to secure posts for a project with the kids.
Excellent product - fastest way to secure posts for a project with the kids.
by TFed
2 people found this helpful
I love this stuff! It's so easy to just pour the mix into a hole for a project, add water and pok...
I love this stuff! It's so easy to just pour the mix into a hole for a project, add water and poke it with a stick to make sure it's mixed up, then repeat in layers. I purchased one bag but I should have gotten 2 bags for the long posts I was putting up for a vertical garden. I didn't fill the holes up all the way but it's been up since May (this is December) and it hasn't leaned at all, and the pocket garden is filled with soil and very heavy. I always let it set up overnight just to be sure it's fully cured before I put stress on it, so I've never had an issue with it when I put a post up for a bird house or other project.
by ALGal
5 people found this helpful
easy to use I poured water in the hole added sakrete i had too much water so i went back to store...
easy to use I poured water in the hole added sakrete i had too much water so i went back to store and got another bag then added it and mixed light post still standing and we had a serious noreaster on Sunday
by gerryb
2 people found this helpful
Showing 1-10 of 771 reviews