Technical Data Sheet
TerraRoads™ Natural Enzyme Soil Stabilizer
Caltrans Approved · U.S. Army Corps of Engineers Approved · 28+ Global Approvals
terraroads.com
Rev. 2026
Patent Pending
TerraRoads™ is a concentrated natural multi-enzyme liquid formulation that catalyzes ion exchange reactions in fine-grained soils, producing a denser, stronger, and more water-resistant road base. In continuous commercial use since 1997. No cement, lime, fly ash, or imported aggregate required.
Performance summary
Up to 25%
Reduction in water demand during compaction
Up to 3.5×
Increase in compressive strength vs. untreated base
Up to 95%
Reduction in dust emissions
Up to 4×
Longer service life vs. untreated roads
Laboratory test results
The following data is drawn from independent Proctor compaction, CBR, and unconfined compressive strength tests conducted on treated soil samples across a range of soil classifications.
| Test (Standard) | Soil type | Untreated | Treated | Improvement |
|---|---|---|---|---|
| Modified Proctor Compaction (ASTM D1557) | Clayey gravel (GC) | 96.2 pcf MDD / 14.8% OMC | 101.4 pcf MDD / 11.2% OMC | 5.4% density gain, 24% reduction in optimum moisture |
| California Bearing Ratio (ASTM D1883) | Sandy clay (SC) | CBR 4.2% | CBR 18.7% | 345% increase in bearing capacity |
| Unconfined Compressive Strength (ASTM D2166) | Low-plasticity clay (CL) | 42 kPa | 187 kPa | 345% increase in compressive strength |
| Modified Proctor Compaction (ASTM D1557) | Silty sand (SM) | 108.5 pcf MDD / 12.1% OMC | 114.2 pcf MDD / 9.4% OMC | 5.3% density gain, 22% reduction in optimum moisture |
| California Bearing Ratio (ASTM D1883) | Poorly graded gravel (GP) | CBR 11.3% | CBR 38.6% | 241% increase in bearing capacity |
| Swell / Shrink Potential (ASTM D4546) | Expansive clay (CH) | 4.8% swell | 0.6% swell | 87.5% reduction in swell potential |
Soil compatibility
TerraRoads™ performs across a broad range of USCS soil classifications. The enzyme formulation catalyzes ion exchange reactions that are most pronounced in fine-grained and mixed soils.
| USCS Classification | Compatibility | Notes |
|---|---|---|
| GC — Clayey gravel | Excellent | High clay fines content maximizes enzyme reaction |
| SC — Sandy clay | Excellent | Strong CBR and density improvements documented |
| CL — Low-plasticity clay | Excellent | Significant strength and moisture reduction |
| CH — High-plasticity clay | Very good | Marked reduction in swell and shrink potential |
| SM — Silty sand | Very good | Density and moisture improvements well documented |
| ML — Low-plasticity silt | Good | Moderate improvement; blending with clay fines recommended |
| GP — Poorly graded gravel | Good | Best results when clay fines ≥ 10% |
| SP — Poorly graded sand | Moderate | Requires clay fines amendment for full benefit |
Application rates
Dosage is calculated based on soil type, project scale, and target performance. The following are standard starting-point rates; final rates are confirmed after on-site soil analysis.
| Application | Dilution ratio | Coverage per litre | Notes |
|---|---|---|---|
| Road base stabilization | 1 L product per 15 m³ of material | 15 m³ of material per litre of concentrate | Apply during grading; compact to 95% modified Proctor |
| Dust suppression (unpaved roads) | 1:200 – 1:400 (product:water) | 200–400 m² per litre of concentrate | Surface spray; reapply after significant rainfall events |
| Subgrade improvement | 1 L product per 15 m³ of material | 15 m³ of material per litre of concentrate | Mix into top 200–300 mm of subgrade before compaction |
| Agricultural track stabilization | 1 L product per 15 m³ of material | 15 m³ of material per litre of concentrate | Ideal for high-traffic farm access roads |
Safety and environmental profile
Toxicity
Non-toxic to humans, animals, and aquatic life at recommended application rates
Biodegradability
Fully biodegradable; no persistent residues in treated soil
pH
Neutral (6.8–7.2); non-caustic, non-corrosive
Regulatory status
Compliant with EPA guidelines for soil amendment products
Handling
No PPE required beyond standard site precautions; safe for handling without specialist equipment
Storage
Stable at ambient temperature; 10+ years shelf life in sealed container
Regulatory approvals
United States
- ✓ Caltrans (California DOT) — Approved
- ✓ U.S. Army Corps of Engineers — Approved
- ✓ 7 U.S. state transportation agencies
- ✓ EPA guidelines compliant
International
- ✓ 28+ regulatory approvals total
- ✓ 6 continents
- ✓ 30+ years commercial use (since 1997)
- ✓ Patent pending formulation
Available formats
1 US Gallon
Trial / small projects
5 US Gallon
Mid-size projects
55 US Gallon
Large projects
275 Gallon IBC
Industrial / bulk