Sakrete vs Quikrete: Which Bag to Buy and Which Mix to Use

The Quikrete mixes that matter, and what each one is for

Quikrete sells a lot of products, but four cover almost every homeowner concrete job. The differences that matter are compressive strength (measured in psi at 28 days), how fast the mix sets, and whether you mix it with water first or pour it in dry.

QUIKRETE Concrete Mix (No. 1101) is the plain gray general-purpose bag, rated at 4000 psi average compressive strength (Quikrete). This is your default for slabs, footings, sidewalks, steps, curbs, and setting posts when you want maximum strength. You mix it with water to a workable consistency and place it. It comes in 40, 50, 60, and 80 lb bags, so you can size the bag to the job.

QUIKRETE Fast-Setting Concrete Mix (No. 1004) is built for one thing: speed. It sets hard in about 20 to 40 minutes and reaches roughly 4000 psi at 28 days (Quikrete). The trick is that for posts you do not mix it at all. You pour the dry mix into the hole around the post and soak it with water, and it kicks in half an hour. That makes it the go-to for fence posts, mailbox posts, deck posts, and basketball hoops. It comes in 50 lb bags. The catch is that fast set time gives you almost no working window, so it is a poor choice for anything you need to finish smooth.

QUIKRETE 5000 Concrete Mix (No. 1007) is the high-strength, high-early-strength option, engineered for 5000 psi after 28 days (Quikrete). It gains strength faster in the first week than standard Concrete Mix, which is why it is the pick for anything that carries weight or needs to be back in service quickly: driveways, driveway aprons, deck supports, patios, and sign footings. The faster early set also makes it the better cold-weather bag, since it develops strength before an early freeze can wreck it. It comes in 60 and 80 lb bags.

QUIKRETE Crack Resistant Concrete Mix (No. 1006) is rated 4000 psi at 28 days and blends in synthetic fibers to reduce shrinkage cracking (Quikrete selector guide). Use it for thin slabs, sidewalks, and patios where surface cracks would bother you. It is not stronger than plain Concrete Mix in psi terms, it is just more forgiving about hairline cracking.

One more thing so you do not grab the wrong bag entirely: mortar mix and sand mix are different animals. Mortar (Type N, Type S) is for laying block and brick, and sand mix (a sand-and-cement topping mix) is for thin repairs and setting flagstone. Neither has the coarse gravel aggregate that structural concrete needs, so do not use them to pour a slab or set a post.

Quikrete mix comparison table

Psi values are from Quikrete product pages and the Quikrete Concrete Mix Selector Guide.

Quikrete Concrete Mix vs Fast Setting: the choice most people get wrong

This is the comparison that trips up the most homeowners, so it is worth being blunt about it.

Use Fast-Setting for posts. Use Concrete Mix for slabs and footings.

Fast-Setting wins when you are setting a single vertical post and you want to backfill, brace it, and be done in an afternoon. No mixing, no wheelbarrow, no waiting a day before you can hang a gate. That is exactly the workflow in our Quikrete fence post guide, which walks through the dry-pour method bag by bag.

Concrete Mix wins for anything flat or structural. Because it sets on a normal schedule, you get the working time to screed, float, and finish a surface, and you can order it in bigger bags for a big pour. If you are hand-mixing a slab, the technique matters as much as the bag, and our how to mix Quikrete guide covers water ratios and getting a consistent batch.

The mistake is using Fast-Setting for a slab because it is "faster." It is not faster in a useful way. It stiffens before you can finish it, and you end up with a rough, uneven surface. And going the other direction, mixing standard Concrete Mix to set a wobbly post is just extra work when the dry-pour method would have held it fine.

When to spend up for QUIKRETE 5000

The jump from 4000 psi Concrete Mix to Quikrete 5000 is worth it in three situations: anything a vehicle drives on (driveways and aprons take real load), cold-weather pours (5000 develops strength quickly and is less likely to be damaged by an early freeze), and structural elements like deck footings where you want more margin. For a plain garden-shed pad or a walkway, standard Concrete Mix is fine and cheaper. Do not pay for 5000 psi you will never use.

A quick worked example

Say you are pouring a 10 by 12 foot patio at 4 inches thick and setting four 4x4 fence posts along one edge.

• The patio is flat and gets foot traffic, not vehicles, so standard Concrete Mix or Crack Resistant is the right call, not 5000.
• The four posts should use Fast-Setting, dry-poured, so you can brace and move on.
• At 4 inches, that patio is 10 x 12 x 0.333 = 40 cubic feet of concrete. An 80 lb bag of Concrete Mix yields about 0.6 cubic foot, so 40 / 0.6 is roughly 67 bags.
• Each post hole at about 10 inches wide and 2 feet deep takes 2 to 3 bags of Fast-Setting, so figure 8 to 12 bags for four posts.

Do not eyeball a bag count that size. Plug the dimensions into the Quikrete bag calculator and it returns the exact bag count for the mix and bag size you choose.

Sakrete vs Quikrete: which brand should you buy?

Here is the honest answer contractors give: it barely matters. Sakrete and Quikrete are competing brands that make the same lineup of products at the same strength ratings. Quikrete's general Concrete Mix is 4000 psi and so is Sakrete's High-Strength Concrete Mix. Quikrete 5000 is 5000 psi and so is Sakrete 5000 Plus. Both make a fast-setting post mix that dry-pours the same way. Both meet the same ASTM standards.

The forums back this up. On a TractorByNet thread where a member asked directly whether there was any quality difference between the two high-strength premixes, the practical consensus was that there is not. As one poster put it, "They are both rated for 4000psi so I assume they are equivalent, at least as far as certifications go," and the original poster's real reason for asking was that Sakrete ran about 20 percent cheaper locally (TractorByNet). The one difference people do notice is the aggregate: some find one brand's stone finishes a touch nicer than the other's, but it is a minor, batch-to-batch, store-to-store thing, not a reason to drive across town.

So what actually decides it:

• Availability. Home Depot tends to stock Quikrete, Lowe's tends to stock Sakrete. Buy what your closest store carries rather than making a special trip. Concrete is heavy and you do not want to haul it far.
• Price. Check the per-bag price the day you buy. They trade places on which is cheaper by region and by promotion, so let the shelf tag decide.
• The specific product. Match the bag to the job using the strength and set-time rules above. That choice matters far more than the brand name on it.

Whichever brand you buy, the cure schedule is the same, and rushing it is the most common way to ruin an otherwise good pour. Concrete keeps gaining strength for weeks, and our Quikrete set, cure, and dry time guide explains how long to wait before you load a slab or lean on a post. For the full lineup of guides, start at the Quikrete guide hub.