Sikacrete 421 CI Rapid Concrete 65 lb Bags, Pallet of 48
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Price facts
- Last seen at $1,399.99 at Best Materials on Oct 31.
Our take on the Sikacrete 421 CI Rapid Concrete 65 lb Bags, Pallet of 48
Sikacrete 421 CI is a one-component, rapid-setting concrete that gains early strength fast and reaches ASTM C928 Type R3 rapid-hardening classification. It comes pre-blended with coarse aggregate, so no field extension is needed, and it carries a migrating corrosion inhibitor plus air entrainment for freeze-thaw exposure. It suits structural repairs, anchorages and cold-weather or fast-turnaround work where ordinary concrete sets too slowly. Against generic rapid-set mixes, the built-in corrosion inhibitor and factory aggregate blend are the main differentiators; the trade-off is a short working window and a 12-month shelf life.
- Rapid hardening to ASTM C928 Type R3
- Migrating corrosion inhibitor protects embedded steel
- Air entrained for freeze-thaw durability
- Factory-blended coarse aggregate, no field extension
- Good workability and finishing
Sikacrete 421 CI Rapid Concrete 65 lb Bags, Pallet of 48 prices at every store
- Best MaterialsNew
Availability unknown
$1,399.99Checked Oct 31
Sikacrete 421 CI Rapid Concrete 65 lb Bags, Pallet of 48 price history
Lowest price we've seen: $1,399.99 on Oct 31 at Best Materials. Tracked across 1 store since Oct 31.
From Best Materials
- One-component, early strength-gaining concrete with factory blended coarse aggregate
- Air entrained and contains a migrating corrosion inhibitor
- High early strength and fast-setting
- Pre-packaged coarse aggregate eliminates field extension and reactive aggregate risk
- Excellent workability and finishing characteristics
- Rapid hardening as defined by ASTM C-928 (Type R3)
- Materials
- Gray powder; one-component concrete containing factory blended coarse aggregate; air entrained with migrating corrosion inhibitor
- Sizing
- Coverage 0.5 ft3 (0.01 m3) per 65 lb (29 kg) bag
- Care
- Shelf life 12 months; mixing ratio 5.5-6 pints (2.6-2.8 L); product temperature 65–75 °F (18–24 °C); ambient air and substrate temperature above 40 °F (4 °C)
- Returns
- Special order item - non-returnable
- Shipping
- Typically ships in 15 - 20 business days plus carrier transit time
- Packs
- Pallet of 48 bags
- In the box
- Pallet of 48 bags, 65 lb (29 kg) each
About the Sikacrete 421 CI Rapid Concrete 65 lb Bags, Pallet of 48
Sikacrete 421 CI is a one-component, rapid-hardening concrete that gains strength early. It is a gray powder with coarse aggregate already blended in at the factory. The aggregate comes pre-packaged, so it does not need to be extended in the field, and there is no risk from reactive aggregate.
The concrete is air entrained and contains a migrating corrosion inhibitor. It sets fast and reaches high early strength. It is workable and finishes well. It meets the ASTM C-928 definition of rapid hardening (Type R3).
- Type
- One-component, rapid-hardening concrete with blended coarse aggregate
- Form
- Gray powder
- Standard
- ASTM C-928 (Type R3)
- Bag weight
- 65 lb (29 kg)
- Coverage
- 0.5 ft³ (0.01 m³) per 65 lb (29 kg) bag
- Mixing ratio
- 5.5-6 pints (2.6-2.8 L) per bag
Questions and answers
- What does the R3 rating mean?
- It is the ASTM C928 rapid-hardening class for fast strength gain. Expect it to reach usable strength much sooner than standard concrete.
- Can it be used in cold weather?
- Its early strength gain helps in cool conditions, but follow the manufacturer's temperature limits for mixing and curing. Frozen substrates and water should be avoided.
- Do I need to add gravel or aggregate?
- No. Coarse aggregate is factory blended into the bag, so you only add water. This removes field extension and reactive aggregate risk.
- How long can I store it?
- The stated shelf life is 12 months. Keep bags dry and off the ground, and use them within that window.
- What is the corrosion inhibitor for?
- The migrating corrosion inhibitor protects embedded steel reinforcement and anchors from corrosion. It is useful in repairs over existing rebar.
- How much does one bag cover?
- Coverage depends on pour thickness. Check the bag yield for your depth before ordering; the pallet holds 48 bags of 65 lb each.
