Sakrete 80lb Concrete Mix vs Concrete Mix PSI-4000
Both are 4,000 psi bagged concrete mixes that meet ASTM C387, so the real choice is bag size and working time. The Sakrete 80 lb bag yields about 0.6 ft³ and needs 3.5 quarts of water; the PSI-4000 comes in a 90 lb bag with a stated 60-minute working time and is formulated for pours 2 inches thick or more. Buy whichever has the lower price per cubic foot at your store, and check the latest prices on Deal.ai before you load up.
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Sakrete 80lb Concrete Mix
Choose the Sakrete 80 lb Concrete Mix if you want a lighter bag that is easier to carry and lift, and you are setting posts or filling small footings where a 60-minute working window is not critical.
- Lighter 80 lb bag is easier to handle on ladders and in tight post holes
- Clear water dose of 3.5 quarts per bag takes the guesswork out of mixing
- Stated 4,000 psi at 28 days and 2,500 psi at 7 days
- Meets ASTM C387
- Smaller yield means more bags per cubic foot
- No stated working time, so you have to judge set by feel
- Slump of 2–3 in is stiff and needs prompt placement
What separates them
| Sakrete 80lb Concrete Mix | Concrete Mix PSI-4000 | |
|---|---|---|
| Bag weight | 80 lb | 90 lb |
| Yield per bag | 0.6 ft³ | About 0.675 ft³ (90 lb at the same mix density) |
| Stated working time | Not stated; slump 2–3 in, initial set 24 hr minimum | 60 minutes |
| Minimum pour thickness | Not stated | 2 inches or more |
| 28-day strength | 4,000 psi | 4,000 psi |
| Standard | ASTM C387 | ASTM C387 |
| Water to add | 3.5 quarts per bag | Just add water; amount not stated |
| Bags per pallet | Not stated |
Price history
- Sakrete 80lb Concrete Mix: lowest $5.45 on Nov 2 at sbsconcreteproducts.com.
- Concrete Mix PSI-4000: lowest $5.04 on Oct 31 at Supply Ontime.
Prices at every store
Sakrete 80lb Concrete Mix
- YAGI Pipe and Steel / McKee's Discount SteelCheck price at YAGI Pipe and Steel / McKee's Discount Steel
- sbsconcreteproducts.comCheck price at sbsconcreteproducts.com
- Southwest Boulder & StoneCheck price at Southwest Boulder & Stone
Concrete Mix PSI-4000
- Supply OntimeCheck price at Supply Ontime
- Supply OntimeCheck price at Supply Ontime
Specs compared
| Spec | Sakrete 80lb Concrete Mix | Concrete Mix PSI-4000 |
|---|---|---|
| Package size | 80 lb | — |
| Yield | 0.6 ft³ | — |
| Water required | 3.5 qts | — |
| Slump range | 2 – 3 in 50 – 75 mm | — |
| 7-day strength | 2,500 psi | — |
| 28-day strength | 4,000 psi | — |
| ASTM certification | ASTM C387 | — |
| Bag size | 80 lb. | — |
| Composition | Mixture of Sand, Coarse Aggregate, and Cementit… | — |
| Compression strength | 2500 psi (7 days), 4000 psi (28 days) | — |
What reviewers say
Sakrete 80lb Concrete Mix
Owners generally report the mix sets hard and holds posts and patches well when water is measured rather than guessed. Complaints center on bags that arrive hard or partially set and on strength falling short when too much water is added.
- Consistent strength when mixed to the stated water amount
- Good for fence posts and small footings
- Blend is uniform, with little clumping in fresh bags
- Bags stored outdoors can arrive hardened
- Easy to overwet, which weakens the finished concrete
- Heavy bags and dusty mixing
Questions and answers
- Which is better for setting fence posts?
- Either works. The Sakrete 80 lb bag is easier to carry to each hole, and one bag sets a typical post. The PSI-4000's 90 lb bag gives more volume per hole if you are bracing larger posts.
- Which is better for a sidewalk or slab?
- The PSI-4000 is the safer pick for flatwork. It is formulated for pours 2 inches or more and states a 60-minute working time, which helps when you are finishing a large area.
- Do they reach the same strength?
- Yes. Both are rated 4,000 psi at 28 days and both meet ASTM C387. Strength is not the deciding factor here.
- How many bags do I need?
- The Sakrete bag yields about 0.6 ft³; the 90 lb PSI-4000 yields roughly 0.675 ft³. Divide your total volume in cubic feet by the yield and round up, then add a bag for waste.
- Is the heavier bag worth it?
- Only if you are pouring flatwork at 2 inches or more or want the stated 60-minute working time. For posts and small patches, the lighter 80 lb bag is easier to manage.
- Can I mix them together?
- You can, since both are 4,000 psi sand, gravel and Portland cement mixes. Keep the water consistent and do not exceed the slump you need, or strength drops.