For heavy construction, our clay forms an impermeable barrier that withstands the most demanding industrial applications. Secure your site with a permanent foundation designed to last.
HIGH QUALITY TANK LINER CLAY

Prevents water seepage and preserves vital agricultural resources with a permanent, natural seal.

Safely contains chemical and industrial byproducts, ensuring complete compliance and preventing groundwater contamination.

Delivers uncompromised structural integrity and extreme impermeability for critical environmental protection.
Accurate estimation prevents material shortages and excess waste. Follow these three steps to determine exactly how much clay you need for your containment project.
Calculate the total square footage of the tank base or pond floor to establish the footprint.
Most industrial applications require a minimum of 6 to 12 inches of compacted clay for full impermeability.
Multiply the cubic yardage by our standard conversion rate of 1.5 tons per cubic yard to find your total.

For critical containment, generic dirt isn't enough. Our engineered clay eliminates guesswork, providing an impermeable, permanent barrier that outperforms standard alternatives on every critical metric.
| Specification | Standard Fill Dirt | Underwood Liner Clay |
|---|---|---|
| Permeability | High / Variable | Impermeable |
| Plasticity Index | Unpredictable | Optimal (High) |
| Compaction Density | Inconsistent Voids | Maximum Density |
| Longevity | Prone to Washouts | Permanent Barrier |

Operating from our headquarters at 931 Underwood Rd in Aledo, TX, we maintain a massive ready-to-load stockpile of premium tank liner clay. Our strategic central location guarantees rapid dispatch and immediate fulfillment for large-scale infrastructure projects.
Our heavy-haul delivery fleet is equipped to transport substantial tonnage, ensuring your containment materials arrive precisely on schedule, no matter the site logistics.
When properly compacted, our Tank Liner Clay typically achieves a permeability coefficient of 1x10^-7 cm/sec or lower, providing a permanent, watertight barrier suitable for high-demand containment.
The clay exhibits a high Plasticity Index (PI), ensuring excellent cohesiveness and structural stability. Exact Atterberg limit data ranges are available on our official Material Safety and Data Sheets (MSDS).
For optimal density and maximum impermeability, compaction moisture content should typically be maintained at 2-4% above optimum moisture content (OMC) during installation.
Yes. Standard Proctor tests, permeability certifications, and comprehensive geotechnical analysis reports are available upon request for engineering review.
Our clay is specifically engineered for critical containment. It resists piping and maintains its impermeable seal even under significant and fluctuating hydrostatic loads, making it ideal for large-scale reservoirs and industrial ponds.
Our fleet schedules are booked weeks in advance for high-volume commercial projects. Request an official quote today to lock in your timeline and ensure your permanent containment material is on-site exactly when you need it.
931 Underwood Rd, Aledo, TX 76008
(817) 441-3300
Address: 931 Underwood Rd Aledo, TX 76008
Line Phone: (817) 441-3300
Hours: Mon–Fri 7AM–4:30PM
Underwood Materials LLC. All rights reserved. Locally owned and operated in Aledo, TX since 2001.