Pond Liners
Professional-grade liners and underlayment for koi ponds, water gardens, and water features — custom cut to your exact size
The Most Important Part of Your Pond
There is nothing more important than a high quality pond liner for your pond, waterfall, or water feature. The right pond liner guarantees long-term leak-proof durability for your koi pond, backyard water garden, or large landscape feature, and a safe environment for your fish and plants. We also carry geotextile underlayment to protect your liner from rocks, roots, and ground movement and help extend its lifespan.
Get an Exact Size for Your Pond Liner
Choosing an exact size for your liner is important in order to avoid seams, stretching, or leaks in the future. Eliminate the guess work and costly mistakes with our online pond liner calculator.
Standard Pond Liner Formula
Length + (2 × Depth) + 2 feet overlap | Width + (2 × Depth) + 2 feet overlap
- ✅The calculator works for rectangular, oval, round, and free-form ponds
- ✅The pond liner calculator accounts for shelves and varying depths
- ✅The pond liner calculator is ideal for DIY and professional installations
Pond Liners for All Your Needs
We carry multiple liner materials to fit different budgets, climates, and pond types.
EPDM Rubber Pond Liners
Most PopularThe standard for koi ponds and permanent water features.
- Highly durable even in the winter months in Utah
- No cracking or becoming brittle with time
- Fish safe for koi, goldfish, and plants
- Holds up to UV and ozone exposure
- Great for unique shallow and deep ponds
- Designed right will last 20+ years
- Ideal for long-lasting koi ponds
PVC Pond Liners
Budget-FriendlyBudget-friendly option for smaller projects.
- Great for smaller projects
- More affordable than EPDM
- Great for smaller shallow ponds
- Less flexible in cold weather
- Has a shorter lifespan
- Best for smaller water gardens
RPE Pond Liners
Commercial GradeLightweight yet extremely durable. Often used for commercial applications.
- Unmatched resistance against punctures and tearing
- Lighter than EPDM but just as strong
- NSF-61 certified options (safe for fish and drinking water)
- Great for large ponds, reservoirs, and retention basins
- Must be covered at the edges to protect from UV rays
- Best for large ponds, commercial projects, and high-stress situations
Benefits of Pond Liners & Underlayment
45 mil EPDM — Most Popular — professional-grade durable, high flexibility for shelves and contours, and the longest life of all common pond liner materials
Fish and plant safe — no toxic additives or chemicals, safe for koi, goldfish, plants, and wildlife
UV and ozone resistant — designed to withstand outdoor conditions with no degradation due to sunlight or temperature changes
Flexible in cold weather — stays elastic in freezing conditions, great for the specific temperature changes in Utah
Custom sizes offered — fewer seams and folds for an ideal fit for your pond design
Geotextile underlayment available — helps protect against punctures from rocks, roots, and debris
Cushioning and root barrier protection — adds an extra layer between the liner and the ground
20+ year lifespan — protects your investment for the long term with minimal maintenance when paired with proper underlayment
Specifications
| EPDM Thickness | 45 mil |
| PVC Thickness | 20–30 mil |
| RPE Thickness | 24–40 mil |
| Underlayment Weight | 8 oz/sq yd |
| Underlayment Width | 15 feet |
| Underlayment Material | Non-woven polypropylene |
| Maximum Width | Up to 50 feet |
| Temperature Range | -40°F to 175°F |
| UV Resistance | Yes |
| Fish Safe | Yes |
Frequently Asked Questions
Plan Before You Buy
These resources and services help you choose products that match your pond setup and Utah conditions.
Need Help Choosing?
Our experts can help you find the right products for your pond. Call (801) 590-8516 or visit our store.