ULTRACAST 360™ is a high-performance white concrete mix engineered for ultra-dense castings, exceptional detail reproduction, and virtually pinhole-free surfaces. Designed for detailed 3D concrete castings, architectural panels, concrete furniture, sinks, planters, wall cladding, sculptures, and decorative concrete applications, ULTRACAST 360 delivers smooth finishes with minimal post-processing and outstanding mold-filling capabilities.
Using advanced particle packing technology and a carefully balanced blend of cements, pozzolans, admixtures, and fine aggregates, ULTRACAST 360 is formulated to flow into intricate molds and complex geometries where traditional concrete mixes often struggle. The result is a dense, durable concrete with consistent color, sharp detail capture, reduced trapped air, and significantly fewer surface imperfections.
Whether mixed to a dough-like consistency for hand-packed sculptural applications or to a highly flowable self-consolidating consistency for direct casting, ULTRACAST 360 provides exceptional versatility across a wide range of artisan and architectural concrete projects. Its white base also allows for easy pigmentation and vibrant color customization.
Perfect for both artistic and functional concrete work, ULTRACAST 360 helps reduce grinding, slurry coats, patching, and other finishing labor while producing professional-quality castings with outstanding surface quality.
Why Choose ULTRACAST 360™
Exceptional Detail Reproduction
Engineered to capture extremely fine details, textures, and sharp edges in highly detailed molds and decorative castings.
Virtually Pinhole-Free Surfaces
Advanced particle packing and optimized flow characteristics help minimize trapped air and surface voids for smoother castings and reduced finishing work.
Ultra-Dense Concrete
A precise blend of cements, pozzolans, admixtures, and carefully graded aggregates creates exceptionally dense and durable concrete.
Consistent Color
Produces uniform color throughout the casting, ideal for decorative and architectural concrete applications where consistency matters.
Minimal Post-Processing
Excellent mold filling and flowability reduce grinding, slurry coating, patching, and surface corrections after demolding.
Adjustable Consistency
Can be mixed from a dough-like sculpting consistency to a highly fluid self-consolidating mix depending on project requirements.
Easy Coloring
ULTRACAST 360 is a white mix that can easily be pigmented to achieve custom colors and decorative finishes.
Designed for Complex Molds
Excellent for silicone molds, textured molds, undercuts, and complex 3D castings where traditional concrete mixes often struggle.
Popular Applications
- Concrete countertops
- Concrete sinks
- Architectural wall panels
- Concrete furniture
- Sculptural concrete
- Decorative concrete
- Silicone mold castings
- 3D concrete castings
- Planters
- Fireplace surrounds
- Thin concrete panels
- Artisan concrete projects
- Commercial decorative concrete
- Custom precast elements
What Makes ULTRACAST 360 Different?
ULTRACAST 360 incorporates aggregate sizes ranging from as small as 1 micron up to approximately 500 microns (35 sieve). This broad particle distribution allows smaller particles to fill the voids between larger particles, creating optimized particle packing.
The result is:
- Increased density
- Improved surface quality
- Better mold filling
- Reduced trapped air
- Improved durability
- Exceptional detail capture
- Reduced finishing labor
Traditional concrete mixes often struggle in highly detailed molds due to larger aggregate sizes, poor flow characteristics, and trapped air pockets. ULTRACAST 360 was specifically engineered to overcome these limitations.
Technical Information
Coverage
- Approximately 9 square feet at 1/2" thickness
- Approximately 4.5 square feet at 1" thickness
Cement Content
- Contains 22.5 lbs of cement per 45 lb bag
Standard Color
- White
- Add up to 2.25 lbs of pigment per bag for custom colors
Materials Needed
Mixing Instructions
Step 1 – Mixing Material
- Add 5.75–6.5 lbs of clean cool water to a clean mixing bucket.
- Add 60–100 grams of Fishstone P-120 Premium Plasticizer to the batch water and mix until fully dissolved.
- If adding pigments, add up to 2.25 lbs per bag at this time.
- Add approximately 80% of the ULTRACAST 360 mix and blend thoroughly.
- Add the remaining balance of the mix and continue mixing until fully blended.
Note: The mix may initially appear stiff or dry until the plasticizers fully activate.
- Dough-like consistency is ideal for hand-packed or sculptural applications.
- Thin milkshake consistency is ideal for direct casting and self-consolidating applications.
Allow the mix to rest for 5–10 minutes before adjusting consistency further with additional plasticizer if needed.
Reinforcement Recommendations
Primary reinforcement is required and reinforcement type may vary depending on the project.
Recommended Reinforcement
- 1–1.25 lbs of 1/2" AR Glass Fibers per 45 lb bag
AR Glass Fiber Notes
- Add fibers at the end of the mixing cycle
- Avoid overmixing to prevent fiber damage
PVA Fiber Option
- Add 0.5 lbs of PVA fibers at the beginning of the mixing cycle
- PVA fibers are designed to disperse throughout the mix
Note: Fibers will tighten the mix consistency, so slightly wetter initial mixes are recommended.
Pouring Instructions
Best Practices for Casting
- Pour slowly into the mold to allow air to escape naturally
- Pour from the lowest point and allow material to flow outward
- Avoid pouring from multiple locations
- Vibration is optional but may improve spread rates on larger castings
- For tall vertical sections, lightly agitate the mix to eliminate lift lines and ensure a consistent appearance
Ideal Working Temperatures
ULTRACAST 360 performs best when the mix temperature is between 60–70°F.
Cold Weather Tips
- Use warm water
- Add accelerator if desired
Hot Weather Tips
- Replace some mix water with ice
- Use a chemical retarder to extend working time
Note: Cooler temperatures will slow set times while warmer temperatures will accelerate curing.
Curing Recommendations
- Allow the mix to reach initial set.
- Cover the casting with plastic to retain moisture and promote proper hydration.
- Keep covered for a minimum of 24 hours.
- If leaving in the mold longer, lightly mist daily with water to improve curing.
Demolding & Processing
- Demold after a minimum of 24 hours
- Concrete will continue gaining strength over approximately 28 days
For surface preparation:
- Sand with 220 grit abrasive if desired
- Remove residue using a mild concrete cleaner or etching product
Sealing Recommendations
For maximum stain protection and long-term durability, seal using a high-quality concrete sealer such as Fishstone U-Seal.
Frequently Asked Questions
Is ULTRACAST 360 good for silicone molds?
Yes. ULTRACAST 360 is specifically engineered for highly detailed molds including silicone rubber molds and complex 3D geometries.
Does ULTRACAST 360 require vibration?
No. The mix is highly flowable and self-consolidating, although vibration may improve flow on larger castings.
Can ULTRACAST 360 be colored?
Yes. Because it is a white mix, pigments can easily be added for custom decorative finishes.
How do I reduce pinholes in concrete castings?
Proper mold filling techniques, optimized flowability, and ULTRACAST 360’s advanced particle packing technology help significantly reduce pinholes and trapped air.
Is ULTRACAST 360 suitable for furniture and architectural concrete?
Absolutely. ULTRACAST 360 is ideal for furniture, wall panels, decorative architectural elements, and artisan concrete applications requiring exceptional surface quality.
Safety Information
Always wear appropriate safety gear including gloves, respirator, and eye protection when handling concrete materials.
WARNING: Contains crystalline silica. Do not breathe dust. Prolonged exposure may cause lung injury including silicosis. Refer to the Safety Data Sheet (SDS) for complete safety information.
For industrial use only.
