ULTRACAST 360, 45lb
$42.50 - $28,560.00
Professional concrete admixture technology
TruCast™ SiX
Ultra-Performance Admix
Engineered multi-function powdered admixture for self-consolidating and high-performance concrete.
TruCast SiX combines water reduction, shrinkage control, air-release technology, polymer modification, engineered particle packing, and ultrafine mineral technology in one convenient powder.
Designed for decorative concrete professionals, architectural precast manufacturers, and advanced concrete fabricators, SiX simplifies batching while helping produce dense, highly workable concrete with smooth surfaces and fewer imperfections.
15%
Recommended Start
By weight of Portland cement. A practical starting point for trial batches.
15–20%
Working Range
Adjust to your materials, equipment, and casting requirements.
SCC
Flow + Stability
Helps the mix flow into detailed molds while reducing segregation.
One
Convenient Powder
Multiple admixture technologies in one easy-to-batch product.
Engineered performance
Flow Where You Need It. Stability Throughout the Mix.
TruCast SiX was developed for self-consolidating, self-flowing, and self-compacting concrete applications. These systems are designed to fill complex molds and consolidate around reinforcement and fibers with little or no mechanical vibration. SiX helps concrete flow while maintaining mix stability, supporting detailed castings, crisp edges, and fewer cosmetic repairs.
Its engineered ultrafine mineral package helps fill spaces between larger cement particles, improving particle packing and helping reduce mix segregation.
More Than a Water Reducer
SiX integrates water reduction, shrinkage control, air-release technology, polymer modification, particle packing, and ultrafine minerals to simplify high-performance decorative concrete batching.
Countertops + sinksConcrete furnitureArchitectural precastGFRC + fiber-reinforced concreteECC + UHPC-style mixesPanels + decorative castingsFire featuresPlantersCustom cast concrete
Ultrafine mineral technology
Engineered Particle Packing Technology
Optimizing particle packing is an important part of modern concrete mix design. TruCast SiX incorporates an engineered blend of ultrafine mineral components, including particles measuring less than one micron, to help fill microscopic voids between larger cement particles.
This optimized particle-size distribution helps create a denser cement matrix with improved paste efficiency and refined surface quality. By reducing internal void space, SiX helps support:
- Improved density and enhanced durability.
- Better consolidation and reduced permeability.
- Smoother finished surfaces and fewer surface pinholes.
- Improved dimensional stability.
This combination of particle packing and ultrafine mineral technology distinguishes TruCast SiX from conventional powdered admixtures.
Key Benefits of TruCast SiX
- Combines multiple admixture technologies in one powder.
- Promotes self-consolidating flow and workability.
- Helps reduce mix segregation.
- Improves particle packing and concrete density.
- Helps reduce plastic and drying shrinkage.
- Helps reduce entrapped air and surface pinholes.
- Improves surface quality and consistency.
- Simplifies batching and reduces individual additive measurements.
- Compatible with white and gray Portland cement.
Start here
Recommended Dosage: 15–20%
We recommend starting at 15% by weight of Portland cement. Based on field experience, 15% is often easier to work with. SiX contains a substantial ultrafine mineral package, and increasing the dosage changes the mix’s flow characteristics and handling.
Use 20% as an upper trial option, adjusting within the range to suit your materials and application. A higher dosage does not automatically mean a better mix; establish the right balance through small trial batches.
| Portland Cement | 15% — Recommended Start | 20% — Upper Trial Option |
|---|---|---|
| 50 lb | 7.5 lb SiX | 10 lb SiX |
| 100 lb | 15 lb SiX | 20 lb SiX |
| 200 lb | 30 lb SiX | 40 lb SiX |
Dosage is an addition based on Portland cement weight, not the weight of the entire concrete batch.
Fine-Tuning Flow at 15%
At 15%, the mix receives less of the built-in plasticizer package than at 20%. Depending on your materials and desired flow, small additions of compatible plasticizer and/or water may be needed. Make adjustments gradually and avoid excessive water.
Transitioning from Super-Six
TruCast SiX is the next evolution of our original Super-Six admixture, with an updated formulation incorporating engineered ultrafine minerals and multiple admixture technologies.
It is not a pound-for-pound replacement for Super-Six. Super-Six was typically used at approximately 5% of Portland cement weight. Start TruCast SiX at 15%, with a recommended working range of 15–20%.
100 lb of Portland Cement
Typical previous Super-Six dose: 5 lb
Recommended starting SiX dose: 15 lb
Upper SiX trial option: 20 lb
Expect some adjustment when transitioning. The additional ultrafines affect workability, so establish water, plasticizer, fiber, pigment, and any additional admixture requirements with small trial batches before full production.
Calculating Cementitious Weight
Approximately 50% of TruCast SiX is reactive material that contributes to the cementitious system. When calculating pigments or other admixtures whose dosage is based on total cementitious weight, include approximately half of the SiX weight.
Total Cementitious Weight = Portland Cement + Other Pozzolans + 50% of SiX
| Example | At 15% SiX | At 20% SiX |
|---|---|---|
| Portland cement | 100 lb | 100 lb |
| TruCast SiX | 15 lb | 20 lb |
| Reactive contribution from SiX | 7.5 lb | 10 lb |
| Total cementitious weight* | 107.5 lb | 110 lb |
*Examples assume no other pozzolans are added. Follow the dosing instructions for each pigment or additional admixture.
Using your own materials
Sand + Cement Starting Mix
Use this as a starting point for trial batches with your locally available materials.
| Material | 15% — Recommended Start | 20% — Upper Trial Option |
|---|---|---|
| Portland cement | 100 lb | 100 lb |
| Sand | 100 lb | 100 lb |
| TruCast SiX | 15 lb | 20 lb |
| Starting water | 31.2–33.3 lb | 31.9–34.1 lb |
| Reinforcement fibers | As required | As required |
These starting water ranges use a water-to-cementitious ratio of approximately 0.29–0.31, counting 50% of the SiX weight as cementitious material. Account for water already present in damp sand.
Sand Grading Matters
Use clean, consistently graded sand. Sand grading affects flow, packing, and handling; a broader grading that includes some larger particles may be beneficial. Confirm suitability through trial batches.
Bagged base mix
Using TruCast SiX with Fishstone HP50™
For one 50 lb bag of Fishstone HP50:
| Material | 15% — Recommended Start | 20% — Upper Trial Option |
|---|---|---|
| HP50 | 50 lb | 50 lb |
| TruCast SiX | 3.75 lb | 5 lb |
| Starting water | 7.8–8.3 lb | 8.0–8.5 lb |
| Reinforcement fibers | As required | As required |
These dosage calculations treat HP50 as approximately 50% cementitious material. Start at the lower end of the water range and adjust gradually for the required consistency.
Recommended Mixing Sequence
-
Prepare the dry blend
When using your own sand and cement, blend them thoroughly before batching.
-
Add batch water
Place the starting water in a clean mixing bucket or mixer.
-
Disperse SiX + PVA 100s
Add SiX to the water and mix thoroughly. If using PVA 100s, add them at this stage to help disperse the fibers before introducing the dry materials.
-
Add approximately 80% of the dry mix
Mix until smooth and homogeneous.
-
Add the remaining dry mix
Continue mixing until fully incorporated.
-
Adjust consistency
Make small adjustments with compatible plasticizer and/or water as needed.
-
Add AR glass fibers last, if used
If using AR glass fibers, introduce them gradually after the base mix has developed good flow.
Mixing time and adjustments vary with equipment, batch size, temperature, sand moisture, and fiber content.
Alternative: Dry-Blending SiX
SiX may also be dry blended with the cement and aggregates before adding water. Select the method that works best with your equipment, batch size, and production procedure.
If using PVA 100s, disperse them in the batch water before adding the dry blend. Add AR glass fibers at the end, after the base mix develops good flow.
Temperature + working time
Warm-Weather Mixing
When ambient temperatures are above 70°F (21°C), use ice for a portion of the required mixing-water weight to help lower the batch temperature and extend working time.
Count Ice as Part of the Water
Ice replaces part of the specified water; it is not additional water. Use small pieces or crushed ice and allow it to melt completely during mixing.
7 lb Cold Water + 3 lb Ice = 10 lb Total Mixing Water
Example only: use the total water required by your selected mix design. Keep the combined weight of liquid water and ice equal to that amount.
Fiber Guidance
Choose Your Fiber Option
Typically, use PVA 100s or AR glass fibers for reinforcement. You do not need to use both. A combination may be used when your mix design calls for it. Select the fiber option and loading for your application, and confirm performance through trial batches.
Add to the batch water
PVA 100s
A recommended starting range is 0.5–1.0% of total batch weight. Disperse them in the batch water with TruCast SiX.
For a 100 lb total batch:
0.5% = 0.5 lb / 227 g
1.0% = 1.0 lb / 454 g
Add at the end
AR Glass Fibers
Add gradually after the base mix has developed good flow. Select the amount for your application and reinforcement requirements.
Confirm the fiber loading and complete mix through trial batches.
Fiber percentages are based on total batch weight, including water, admixtures, and fibers. Fiber loading affects flow.
Why We Developed TruCast SiX
After years of working with decorative concrete professionals, we recognized that many high-performance mix designs required measuring several separate admixtures. This added complexity, increased batching time, and created opportunities for inconsistency.
TruCast SiX was developed to simplify that process. It builds on the original Super-Six concept with a re-engineered formulation using modern concrete technology, advanced particle-packing principles, and ultrafine reactive minerals.
Combining these technologies in one powder helps reduce measuring errors, shorten batching time, and promote consistent results. Fabricators can produce dense, durable decorative concrete with greater confidence and repeatability.
Frequently Asked Questions
What is TruCast SiX?
TruCast SiX is an engineered multi-function powdered admixture designed to improve workability, particle packing, surface quality, and overall performance in self-consolidating and high-performance concrete.
Is TruCast SiX the same as Super-Six?
No. SiX replaces the original Super-Six admixture but has a substantially updated formulation. Super-Six was typically used at about 5% of Portland cement weight. Start SiX at 15%, within a 15–20% working range. Do not substitute it pound-for-pound into an existing Super-Six mix; follow the current SiX dosage and mix-recipe guidance.
What makes TruCast SiX different?
Unlike conventional admixtures that perform a single function, SiX combines multiple performance technologies in one powder: water reduction, shrinkage control, air release, polymer modification, particle packing, and ultrafine mineral technology.
What is particle packing?
Particle packing is the optimization of particle sizes within a concrete mix. The ultrafine mineral package in SiX includes particles measuring less than one micron that help fill microscopic spaces between larger cement particles, supporting a denser, more refined matrix.
Does TruCast SiX reduce pinholes?
SiX is engineered to improve consolidation and reduce entrapped air, helping produce smoother castings with fewer surface pinholes and less finishing work.
Is TruCast SiX compatible with white cement?
Yes. SiX is compatible with white and gray Portland cement systems.
Can I use TruCast SiX for concrete countertops?
Yes. SiX is suitable for concrete countertops, sinks, furniture, architectural panels, precast components, and other decorative castings where surface quality and performance matter.
Is TruCast SiX intended for professionals?
SiX was developed for professional fabricators, precast manufacturers, contractors, and serious DIY concrete artisans seeking consistent, high-performance results.
Should I use PVA 100s and AR glass together?
Typically, choose PVA 100s or AR glass fibers; you do not need both. A combination may be used when your mix design calls for it. Confirm the fiber selection and loading through trial batches.
Looking for Super Six concrete admixture or Super 6 admixture? TruCast SiX is its next-generation replacement, with updated dosage and mixing requirements.
About the TruCast Family
TruCast is Fishstone’s family of premium powdered concrete admixtures engineered for high-performance concrete. Each product is developed to simplify batching, improve consistency, and help fabricators produce stronger, denser decorative concrete.
From countertops, GFRC panels, and architectural precast to furniture and custom castings, the TruCast family supports professional fabrication with Fishstone’s experience serving the decorative concrete industry.
Before full production
Start at 15%. Trial. Adjust.
Always trial TruCast SiX with your own materials and equipment. Begin at 15%, establish a consistent mixing procedure, and adjust gradually to achieve the required flow, consolidation, and finish.
Refer to the current technical data sheet, quick batch guides, and Safety Data Sheet for additional batching, handling, and safety information.
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