Self-Healing Concrete, Scientifically Engineered
Cracksfox is prepared from a mix of milled activated clay-based materials where active microbial agents have been mounted on each particle of clay. The active ingredients will prevent cracks or repair cracks in concrete or mortar.
What is Cracksfox?
Cracksfox is prepared from a mix of milled activated clay-based materials where active microbial agents have been mounted on each particle of clay. The active ingredients will prevent cracks or repair cracks in concrete or mortar.
Unlike surface-applied sealants or post-construction repair systems, Cracksfox works from within the concrete matrix. Its embedded agents remain dormant until triggered by moisture entering newly formed micro-cracks — at which point they activate to precipitate calcium carbonate crystals that physically bridge and seal the damage.
The technology is the result of over 8 years of materials science research at the University of Embu, validated through extensive laboratory testing and commercial-grade field trials across Kenya.
Cracksfox comes in 0.5kg, 5kg, 20kg, and in bulk - selling at 5 USD per kilogram.
Full Product Labeling & Instructions
Manufactured by Cracksfox Limited • Embu, Kenya
How It Works
From mix integration to autonomous crack repair — a four-step process engineered for simplicity and maximum impact.
Integration
Cracksfox is blended directly into the concrete mix during batching. No specialized equipment or modified procedures required — it works with standard concrete formulations.
Dormant Embedding
During curing, the cracksfox agents become uniformly distributed throughout the concrete matrix. They remain dormant and inert, with zero impact on initial compressive strength or workability.
Crack Detection & Activation
When micro-cracks form and moisture infiltrates, the dormant agents activate. They begin precipitating calcium carbonate crystals — the same mineral that forms limestone — directly within the crack.
Autonomous Sealing
Calcium carbonate crystals grow to physically bridge and seal the crack, restoring structural continuity. This process can repeat multiple times over the structure's lifespan, providing ongoing protection.
Durability By the Numbers
Laboratory-validated and field-tested performance metrics that demonstrate the measurable impact of Cracksfox technology.
Crack prevention rate in laboratory and field conditions
Maximum crack width autonomously sealable
Typical crack sealing completion time
Extended infrastructure service life potential
SGS TEC Services Compliance Report
Official verification testing conducted by SGS TEC Services (Lawrenceville, GA) — an AASHTO R18, ANS/ISO/IEC 17025:2017, and US Army Corps of Engineers accredited facility — confirming Cracksfox compliance with ASTM C494 and AASHTO M194 standards.
SGS TEC Services Compliance Verification
Comprehensive compliance testing conducted by SGS TEC Services in Lawrenceville, Georgia — an AASHTO R18, ANS/ISO/IEC 17025:2017, and U.S. Army Corps of Engineers accredited laboratory.
"Based on our results to date, Cracksfox complies with the requirements in AASHTO M194 and Table 1 of ASTM C494 for Type S (Specific Performance) chemical admixtures."
ASTM C494 / AASHTO M194 Verification Summary
Interim Report Data for Type S Admixture • Laboratory No: 26-1191
| Test Parameter | Control Mixture | Cracksfox Mixture | ASTM C494 Requirement | Compliance Status |
|---|---|---|---|---|
| Compressive Strength (3 Days) | 3,220 psi | 3,640 psi (113%) | Min. 90% of control | Pass (+23% above req) |
| Compressive Strength (7 Days) | 4,630 psi | 4,800 psi (104%) | Min. 90% of control | Pass |
| Compressive Strength (28 Days) | 5,530 psi | 5,900 psi (107%) | Min. 90% of control | Pass |
| Flexural Strength (3 Days) | 540 psi | 585 psi (108%) | Min. 90% of control | Pass |
| Flexural Strength (28 Days) | 680 psi | 710 psi (104%) | Min. 90% of control | Pass |
| Initial Setting Time Deviation | 236 min | 229 min (-7 min) | -60 to +78 min | Pass |
| Final Setting Time Deviation | 316 min | 309 min (-8 min) | -60 to +90 min | Pass |
| Length Change (Shrinkage Increase) | -0.027% | 0.001 increase | 0.010 max | Pass (10x Margin) |
| Water Content (% of Control) | 284 lb/yd³ | 275 lb/yd³ (97%) | Reduced water demand | Optimal |
Long-Term Value Creation
Self-healing concrete delivers compounding returns over the full infrastructure lifecycle — lower costs, fewer disruptions, and reduced environmental impact.
Lifecycle Cost Reduction
Lower total ownership costs through dramatically fewer repair cycles over the structure's lifetime.
Fewer Maintenance Events
Reduce scheduled and unscheduled maintenance interventions by more than half.
Service Life Extension
Structures treated with Cracksfox can potentially triple their useful service life before major rehabilitation.
Carbon Footprint Reduction
Lower embodied carbon through extended lifespan and reduced repair material consumption.
Engineering Specifications
Engineered for Real-World Performance
Cracksfox is prepared from a mix of milled activated clay-based materials where active microbial agents have been mounted on each particle of clay. The active ingredients will prevent cracks or repair cracks in concrete or mortar.
The additive is compatible with all common Portland cement types, supplementary cementitious materials (fly ash, GGBS, silica fume), and admixtures. It performs across a wide range of water-cement ratios and curing conditions.
For structural engineers and specifiers, Cracksfox represents a passive durability enhancement — one that works continuously without monitoring, maintenance, or external intervention.
Where Cracksfox Delivers
From marine environments to high-rise foundations, our technology is engineered for the most demanding construction scenarios worldwide.
Bridges & Viaducts
Protect critical transportation links from chloride ingress, freeze-thaw cycling, and dynamic loading stresses.
Water Infrastructure
Ensure watertight integrity for dams, reservoirs, treatment plants, and stormwater management systems.
High-Rise Construction
Extend the durability of foundations, columns, and structural slabs in multi-story commercial buildings.
Marine & Coastal
Combat aggressive saltwater exposure and wave action in harbors, seawalls, and offshore platforms.
Tunnels & Underground
Prevent water infiltration and chemical attack in tunnels, underground parking, and subsurface utilities.
Pavement & Roads
Reduce surface deterioration, pothole formation, and base layer cracking in heavy-traffic roadways.
Industrial Floors
Maintain structural integrity under chemical exposure, heavy equipment, and thermal cycling in factories and warehouses.
Precast Elements
Enhance durability of prefabricated beams, panels, pipes, and modular construction components.
Ready to Engineer Durability?
Explore how Cracksfox self-healing concrete can transform your next project. Request technical documentation, dosage guidance, or schedule a consultation with our materials science team.