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One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchFor ordinary concrete slabs and foundations, start with a locally available general-purpose portland or blended hydraulic cement that meets the project specification. Change that choice when the plans or exposure conditions call for sulfate resistance or high early strength. For masonry mortar and plaster or stucco, use products specified for those applications—not general-purpose concrete cement by assumption.
Cement is the binder, not the whole concrete mix: concrete also contains water and aggregates. The right cement designation alone cannot determine a slab or foundation mix or ensure performance; the specification, mixture proportions, placement, curing, exposure and local code all matter.
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Choose by application and exposure
| Application | Starting point | What may change the choice |
|---|---|---|
| Typical slab or foundation concrete | General-purpose portland or blended hydraulic cement that meets the project specification | Sulfate exposure, required strength-development schedule, local availability and the specified concrete mixture |
| Concrete exposed to moderate sulfate conditions | Cement meeting the specified moderate sulfate-resistance class; U.S. examples include Type II or blended cement marked MS | The soil or groundwater exposure classification and the project standard |
| Concrete exposed to severe sulfate conditions | Cement meeting the specified high sulfate-resistance class; U.S. examples include Type V or blended cement marked HS | Exposure classification and the full mixture requirements. Cement type alone cannot compensate for an unsuitable water-to-cementitious-materials ratio. |
| Work requiring high early strength | Type III portland cement or an appropriately designated HE blended cement, when specified | Construction schedule, temperature, mixture and specification |
| Masonry mortar | Masonry cement or mortar cement suited to the masonry specification | Masonry unit, mortar type, exposure and local requirements |
| Cement plaster or stucco | A specified plaster or stucco system; plastic cement is made primarily for plastering, while general-purpose cement may also be an ingredient in plaster mixes | Substrate, lath or system, exposure, finish, proportions and installation requirements |
These cement-type examples follow U.S.-oriented designations summarized by the American Cement Association (ACA). Type I is general purpose, Type II is associated with moderate sulfate conditions, Type III with high early strength and Type V with more severe sulfate conditions. Blended-cement designations include GU for general use, MS for moderate sulfate resistance, HS for high sulfate resistance and HE for high early strength. Names, standards and products vary by region, so the adopted project specification and local standard take precedence.
For a slab or foundation, the plans matter more than a generic “best cement”
For routine concrete work, a general-purpose cement that complies with the specified concrete mixture is a sensible starting point. But a project title or bag label does not establish the foundation design, required strength, reinforcement, or mixture proportions. Those depend on the plans, applicable code, ground conditions and intended use.
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- MULTIPURPOSE: Basic building material for crafts, pavement, sidewalks, reinforced concrete buildings, masonry units, and more
- MIX AND USE: Use to create concrete, mortar, and stucco mixes
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- HIGH STRENGTH: Solid once dry, dry in 48 hours
- LESS IS MORE: One bag yields approximately .16 cu. ft.
Ask the supplier or design professional to confirm the specified cement type and concrete mixture if plans are unclear. In particular, check soil or groundwater sulfate exposure and any required strength-development schedule before substituting cement. Do not select a bag solely by brand, color or a claim that it is “stronger.”
When sulfate resistance changes the choice
Sulfates in soil or groundwater can affect concrete, so the project’s exposure classification should drive the specified resistance. Moderate and high sulfate resistance are distinct categories, not interchangeable labels: U.S. examples include Type II or MS for moderate conditions and Type V or HS for high conditions.
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High sulfate-resistant cement may gain strength more slowly than Type I, and it does not make concrete sulfate-proof. The ACA cautions that even concrete made with high sulfate-resistant cement may not withstand severe sulfate exposure if its water-to-cementitious-materials ratio is too high. The full mixture and exposure requirements matter, not just the cement type.
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Masonry mortar
Masonry cement and mortar cement are products intended for mortar, not default substitutes for general-purpose cement in structural concrete. Choose the product and mortar type called for by the masonry specification; the masonry unit, exposure and local requirements also affect the choice. The ACA glossary distinguishes these products using cited ASTM definitions: cement terminology and types.
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- HIGH STRENGTH: Solid once dry, dry in 48 hours
- LESS IS MORE: One bag yields approximately .5 cu. ft.
Plaster and stucco
Use the specified plaster or stucco system for the substrate and installation. Plastic cement is made primarily for plastering; general-purpose cement can also be used as an ingredient in plaster mixes, but that does not make the products or systems interchangeable. Confirm the required proportions, finish and installation details for the chosen system. The ACA describes cement applications, including plaster and stucco, in its applications guidance.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What the cement label cannot solve
- Mix design: Concrete combines cementitious binder, water and aggregates. Proportions must suit the specified use and exposure.
- Placement and curing: Consolidation, moisture and temperature during curing affect hydration and strength development.
- Freeze-thaw exposure: Air entrainment is a common durability strategy, but it is generally achieved by adding an air-entraining admixture during batching rather than relying on air-entraining cement.
- Structural requirements: Reinforcement, loads, foundation details and code compliance are not determined by cement type alone.
All portland and blended cements are hydraulic: they react with water and can harden under water. Blended cements may contain portland cement or clinker along with materials such as limestone, slag, coal ash, silica fume, calcined clay or other pozzolans. The ACA says blended cement can reduce concrete’s carbon footprint and enhance durability, but performance depends on the specific product and concrete mixture. Its September 22, 2026 guidance reports that blended cement accounted for roughly two-thirds of the U.S. cement market as of August 2025; that dated market estimate is context, not a recommendation for an individual job: Blended Cement in Concrete: Technical Guidance and Proven Applications.
How to confirm the right product
- Identify the application: concrete slab or foundation, masonry mortar, or plaster/stucco. Confirm that the product is designed for that use.
- Read the plans and specification: note the required cement designation, concrete mixture and any strength or exposure requirements.
- Check local conditions: establish whether sulfate-bearing soil or groundwater, freeze-thaw exposure or other conditions affect the specification.
- Verify substitutions: ask the supplier or qualified design professional before replacing a specified type with a locally available alternative. Similar labels across regions do not guarantee equivalent requirements.
- Follow the full installation requirements: use the specified proportions, placement, reinforcement and curing procedures rather than expecting cement selection to compensate for a deficient mix or installation.
For a deeper technical reference, the ACA lists the 17th edition of Design and Control of Concrete Mixtures, a reference on concrete technology and construction: Design & Control of Concrete Mixtures. It is not a substitute for project plans, local specifications or qualified design advice.
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