Why exactly do most customers need concrete cistern liners? Concrete cisterns, over time, can develop cracks or become porous, leading to water loss and potential contamination. Installing a custom-fitted liner offers an effective solution to these challenges. Our cistern liners are tailored to fit your specific tank dimensions, ensuring a secure and watertight seal. Depending on your water storage needs, we provide liners made from materials compliant with FDA and NSF/ANSI 61 standards for potable water, as well as options suitable for non-potable applications.
Features and benefits of concrete cistern liners
Installing a concrete cistern liner delivers both immediate protection and long-term value for your water storage system. From extending tank life to ensuring water safety, liners offer a practical upgrade for new builds and existing tanks alike. Below, we’ve outlined the core advantages and technical features to help you make an informed decision.
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Cistern Liner Fabric Line‑up – Spec Sheet
| # | Fabric & Thickness | Construction | Weight (oz/yd²) | Grab Tensile (MD / TD, lbs) | Puncture (lbs) | Notes |
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| 1 | Single‑Scrim RPE 20 mil | Black HDPE, 12 × 12 scrim | 9.4 | 250 / 340 | 140 | Lightest, economical potable liner |
| 2 | Single‑Scrim RPE 24 mil | 12 × 12 scrim | 11.5 | 350 / 335 | 182 | Popular all‑round thickness |
| 3 | Double‑Scrim RPE 24 mil | 12 × 12 × 2 scrim | 12.0 | 380 / 370 | 220 | Two internal scrims for extra puncture resistance |
| 4 | Single‑Scrim RPE 30 mil | 12 × 12 scrim | 15.6 | 340 / 520 | 200 | Thicker coating (5.5 mil/side) for longer life |
| 5 | LDPE + LLDPE Laminated 30 mil | Single scrim, dual‑film laminate | 14.7 | 410 / 400 | 195 | Smooth, glossy LDPE surface; high hydrostatic rating (635 psi) |
| 6 | Double‑Scrim RPE 40 mil | 16 × 16 scrim | 18.5 | 680 / 680 | 350 | Heavy‑duty RPE; highest tear values in the group |
| 7 | Double‑Scrim HDPE 45 mil | 16 × 16 scrim, LDPE coating | 22.5 | 655 / 880 | 365 | Thickest poly liner; 880 psi hydrostatic rating |
| 8 | Reinforced PP, Low‑Temp 45 mil | 9 × 9 polyester scrim in PP | 11.0 | 250 lbs/ft (warp) | 120 lbs/ft | Excels in chemical compatibility & –50 °F flexibility |
*See our Cistern Liner Product Flyer for more information
Applications for concrete cistern liners
Cistern liners provide flexible, long-lasting containment across a wide range of water storage scenarios. Whether you're protecting drinking water or repurposing an older tank, liners are a proven solution in both residential and commercial settings. common use cases include:
- Residential rainwater harvesting: Line in-ground concrete tanks to safely store rainwater for household or irrigation use.
- Remote and rural communities: Secure drinking water supplies in locations without municipal infrastructure.
- Island developments: Provide sanitary water storage in areas with limited access to fresh water sources.
- Agricultural operations: Store non-potable water for livestock, crop irrigation, or equipment cleaning.
- Construction sites: Contain process water or reclaimed stormwater during development projects.
- Fire protection systems: Retrofit cisterns to hold emergency water reserves for fire suppression.
- Industrial containment: Use liners to separate and manage non-potable liquids or wastewater in a secure, isolated environment.
