For an quicker shopping experience, order 0.75mm butyl liner with the addition of the underlay included in the purchase. The liner and underlay will both be made to the size selected so if you need extra underlay for any reason please go to the underlay section and add extra there or select the liner and underlay separately.
Below are the descriptions of each product included in this bundle:
Butyl pond liner
Butyl rubber pond liner has been trusted by professional pond builders for more than 50 years because it combines exceptional flexibility with outstanding durability. Suitable for koi ponds, wildlife ponds, ornamental garden ponds, lakes, streams and water features, genuine Butyl rubber easily moulds around shelves, curves and planting areas to create a watertight seal. Naturally resistant to UV light, frost and weathering, Butyl remains flexible throughout the seasons. When installed with a quality geotextile underlay, a Butyl pond liner can provide decades of reliable performance.
What thickness is available?
Our Butyl pond liner is manufactured in a durable 0.75mm thickness, offering an excellent balance of flexibility, strength and long-term reliability. Made from premium synthetic rubber, it is suitable for virtually every pond application, including:
- Wildlife ponds
- Koi ponds
- Ornamental garden ponds
- Raised ponds
- Streams and waterfalls
- Lakes
- Reservoirs
- Tailor-made and box-welded liners
Compared with PVC pond liner, Butyl is significantly more flexible, more resistant to punctures and has a much longer expected lifespan. In the unlikely event of accidental damage, it can usually be repaired using a suitable pond liner repair kit.
How long does Butyl last?
One of the biggest advantages of Butyl rubber is its exceptional longevity. When installed correctly with protective underlay and protected from sharp objects during installation, a Butyl pond liner can last for many decades.
The manufacturer's warranty is:
- Lifetime for orders under 100 square metres
- 25 years for orders over 100 square metres
Please refer to our Terms and Conditions for full warranty details.
Benefits of Butyl Rubber Pond Liner:
- Excellent flexibility for irregular pond shapes
- UV resistant to help prevent deterioration in sunlight
- Frost resistant and remains flexible in cold weather
- Butyl rubber is widely regarded as one of the most durable and flexible pond liner materials available
- Fish, wildlife and plant safe
- Highly resistant to punctures when used with an underlay liner
- Easy to repair if accidental damage occurs
- Suitable for formal and natural pond designs
- Long service life
How do I calculate the liner size?
If you know what length and width of Butyl liner to order, then add them to the relevant boxes above by using the drop downs, or if you are not sure how much to order, then go to our pond liner size calculator and add in the exact measurements of your pond and the calculator will work out how much you need to order to avoid waste or disappointment.
Butyl or Epalyn EPDM pond liner?
Both Butyl and Epalyn EPDM are premium rubber pond liners offering excellent flexibility and durability. Butyl has a long-established reputation among professional pond builders, while EPDM has become increasingly popular due to its excellent weather resistance and value. Both materials provide an outstanding solution for building long-lasting garden ponds when installed correctly.
Is Butyl pond liner safe for fish?
Yes. Quality Butyl rubber pond liner is non-toxic and completely safe for fish, amphibians, aquatic plants and other wildlife. Once installed, it provides a stable waterproof barrier without releasing harmful substances into the water, making it ideal for koi ponds and wildlife ponds alike.
Do I need a pond underlay?
Although Butyl rubber is extremely durable, we always recommend installing a heavy-duty geotextile underlay beneath the liner. Underlay protects against sharp stones, roots and ground movement, helping maximise the life of your pond liner and reducing the risk of punctures.
How to install a Butyl pond liner and underlay
Installing a Butyl pond liner is straightforward with a little preparation. Start by excavating your pond to the required shape and depth, ensuring the top edge is level all the way around. Carefully remove any sharp stones, flint, roots or other objects that could damage the liner over time.
Before laying the liner, install your heavy-duty geotextile underlay. The underlay provides additional protection against punctures caused by stones, roots and ground movement, helping to extend the life of your pond liner.
Once the underlay is in place, carefully unfold the Butyl pond liner and drape it evenly over the excavation, allowing an equal overlap around all sides of the pond. Gently ease the liner into the contours of the pond, smoothing out smaller wrinkles and neatly folding any larger pleats without stretching the material.
Begin filling the pond with water slowly. As the water level rises, continue adjusting the liner so it settles naturally into the shape of the pond. When the pond is completely full, leave it for at least 48 hours before trimming any excess liner or completing the edging. This allows you to confirm that the liner has not been damaged during installation and has settled fully into position.
Once you are satisfied everything is watertight, finish the pond edges using your chosen materials. If using paving slabs or coping stones, ensure they overlap the pond liner by at least 51 mm (2 inches) to conceal and protect the liner from sunlight and accidental damage.
Expert Tip: Avoid installing a Butyl pond liner on very hot, sunny days when the material becomes softer and more difficult to position accurately. A mild, dry day provides the best conditions for achieving a neat, wrinkle-free installation.
Geotextile Underlay
Geotextile 250gm grey protective pond underlay is a mechanically bonded polypropylene needle punched material. This is a high performing, tough underlay relative to some brands available on the market.
Geotextile is used to protect your pond liner from being punctured by sharp stones, rocks, roots and other soil debris. A protective underlay also acts as an escape route for any gasses that may build up under a pond liner.
If you intend on covering your pond liner with soil, gravel, rocks or concrete, it is advisable to add Geotextile protective underlay both above and below the liner to prevent costly and time consuming repairs.
Protective liner is recommended for all pond liner installations. Liners Online guarantee all our pond liners when used with this protective liner.
Geotextile is supplied in rolls of 2 metre widths.
Features of Geotextile pond underlay:
- Remains unaffected by extreme weather conditions
- Rot resistant
- Easy to install
- Helps prevent holes and leaks in pond liner
- Environmentally safe
- Provides the first line of defence against punctures and tears to a pond liner
If you are unsure how much underlay you will need for your pond go to our Pond calculator page and fill in your pond size.
We use Palletway or DX Transport to deliver Liners Online orders. We aim to process and dispatch all pond liner orders within 5 to 10 working days.
UK mainland = £15.50 for the delivery of all pond liner orders.
Remote Scotland and Isle of Wight = £65 for the delivery of all pond liner orders
UK off-shore islands = £125 for the delivery of all pond liner orders.
All smaller items (Total weight under 10kg) have a shipping cost of £9.70 to all the above locations.
If you are unsure which of the above area's you fall into, please get in touch via our contact us page or call us on 01526 399033. We will just need your postcode to verify the correct area.
Pond Liners & Underlay
All pond liners are manufactured to bespoke sizes, therefore we do not accept returns or exchanges for any pond liner once an order has been placed.
If your liner arrives faulty or incorrect due to an error on our part, please contact us as soon as possible. We will arrange collection of the liner and either repair or replace it at no additional cost.
All Other Products
For all other products, returns are accepted within 28 days of the delivery date.
The customer is responsible for organising and covering the cost of the return.
Items must be unused, in their original condition, and include all packaging and documentation.
If you have any questions or wish to arrange a return, please contact our customer service team.
The product carries a lifetime guarantee against leakage due to material degradation or faulty seams.
Lifetime shall mean the duration of the life of the person registered on the guarantee card while residing at the property where the pond liner was installed. The guarantee is not transferable to other persons or property and does not cover any form of commercial use. The liner must be installed in accordance with the instructions given and the water level maintained to the top of the liner during periods of evaporation. The guarantee does not cover any form of improper installation or use resulting in mechanical damage however caused, nor consequential loss, remedial or repair works.
Any liner subject to a claim under this guarantee shall be repaired, replaced or a refund of the original purchase price given at the discretion of Liners Online. The retailer’s official receipt should be kept in a safe place, as it will be required in the unlikely event of a claim under the terms of this guarantee.
These conditions do not affect your statutory rights.
For an quicker shopping experience, order 0.75mm butyl liner with the addition of the underlay included in the purchase. The liner and underlay will both be made to the size selected so if you need extra underlay for any reason please go to the underlay section and add extra there or select the liner and underlay separately.
Below are the descriptions of each product included in this bundle:
Butyl pond liner
Butyl rubber pond liner has been trusted by professional pond builders for more than 50 years because it combines exceptional flexibility with outstanding durability. Suitable for koi ponds, wildlife ponds, ornamental garden ponds, lakes, streams and water features, genuine Butyl rubber easily moulds around shelves, curves and planting areas to create a watertight seal. Naturally resistant to UV light, frost and weathering, Butyl remains flexible throughout the seasons. When installed with a quality geotextile underlay, a Butyl pond liner can provide decades of reliable performance.
What thickness is available?
Our Butyl pond liner is manufactured in a durable 0.75mm thickness, offering an excellent balance of flexibility, strength and long-term reliability. Made from premium synthetic rubber, it is suitable for virtually every pond application, including:
- Wildlife ponds
- Koi ponds
- Ornamental garden ponds
- Raised ponds
- Streams and waterfalls
- Lakes
- Reservoirs
- Tailor-made and box-welded liners
Compared with PVC pond liner, Butyl is significantly more flexible, more resistant to punctures and has a much longer expected lifespan. In the unlikely event of accidental damage, it can usually be repaired using a suitable pond liner repair kit.
How long does Butyl last?
One of the biggest advantages of Butyl rubber is its exceptional longevity. When installed correctly with protective underlay and protected from sharp objects during installation, a Butyl pond liner can last for many decades.
The manufacturer's warranty is:
- Lifetime for orders under 100 square metres
- 25 years for orders over 100 square metres
Please refer to our Terms and Conditions for full warranty details.
Benefits of Butyl Rubber Pond Liner:
- Excellent flexibility for irregular pond shapes
- UV resistant to help prevent deterioration in sunlight
- Frost resistant and remains flexible in cold weather
- Butyl rubber is widely regarded as one of the most durable and flexible pond liner materials available
- Fish, wildlife and plant safe
- Highly resistant to punctures when used with an underlay liner
- Easy to repair if accidental damage occurs
- Suitable for formal and natural pond designs
- Long service life
How do I calculate the liner size?
If you know what length and width of Butyl liner to order, then add them to the relevant boxes above by using the drop downs, or if you are not sure how much to order, then go to our pond liner size calculator and add in the exact measurements of your pond and the calculator will work out how much you need to order to avoid waste or disappointment.
Butyl or Epalyn EPDM pond liner?
Both Butyl and Epalyn EPDM are premium rubber pond liners offering excellent flexibility and durability. Butyl has a long-established reputation among professional pond builders, while EPDM has become increasingly popular due to its excellent weather resistance and value. Both materials provide an outstanding solution for building long-lasting garden ponds when installed correctly.
Is Butyl pond liner safe for fish?
Yes. Quality Butyl rubber pond liner is non-toxic and completely safe for fish, amphibians, aquatic plants and other wildlife. Once installed, it provides a stable waterproof barrier without releasing harmful substances into the water, making it ideal for koi ponds and wildlife ponds alike.
Do I need a pond underlay?
Although Butyl rubber is extremely durable, we always recommend installing a heavy-duty geotextile underlay beneath the liner. Underlay protects against sharp stones, roots and ground movement, helping maximise the life of your pond liner and reducing the risk of punctures.
How to install a Butyl pond liner and underlay
Installing a Butyl pond liner is straightforward with a little preparation. Start by excavating your pond to the required shape and depth, ensuring the top edge is level all the way around. Carefully remove any sharp stones, flint, roots or other objects that could damage the liner over time.
Before laying the liner, install your heavy-duty geotextile underlay. The underlay provides additional protection against punctures caused by stones, roots and ground movement, helping to extend the life of your pond liner.
Once the underlay is in place, carefully unfold the Butyl pond liner and drape it evenly over the excavation, allowing an equal overlap around all sides of the pond. Gently ease the liner into the contours of the pond, smoothing out smaller wrinkles and neatly folding any larger pleats without stretching the material.
Begin filling the pond with water slowly. As the water level rises, continue adjusting the liner so it settles naturally into the shape of the pond. When the pond is completely full, leave it for at least 48 hours before trimming any excess liner or completing the edging. This allows you to confirm that the liner has not been damaged during installation and has settled fully into position.
Once you are satisfied everything is watertight, finish the pond edges using your chosen materials. If using paving slabs or coping stones, ensure they overlap the pond liner by at least 51 mm (2 inches) to conceal and protect the liner from sunlight and accidental damage.
Expert Tip: Avoid installing a Butyl pond liner on very hot, sunny days when the material becomes softer and more difficult to position accurately. A mild, dry day provides the best conditions for achieving a neat, wrinkle-free installation.
Geotextile Underlay
Geotextile 250gm grey protective pond underlay is a mechanically bonded polypropylene needle punched material. This is a high performing, tough underlay relative to some brands available on the market.
Geotextile is used to protect your pond liner from being punctured by sharp stones, rocks, roots and other soil debris. A protective underlay also acts as an escape route for any gasses that may build up under a pond liner.
If you intend on covering your pond liner with soil, gravel, rocks or concrete, it is advisable to add Geotextile protective underlay both above and below the liner to prevent costly and time consuming repairs.
Protective liner is recommended for all pond liner installations. Liners Online guarantee all our pond liners when used with this protective liner.
Geotextile is supplied in rolls of 2 metre widths.
Features of Geotextile pond underlay:
- Remains unaffected by extreme weather conditions
- Rot resistant
- Easy to install
- Helps prevent holes and leaks in pond liner
- Environmentally safe
- Provides the first line of defence against punctures and tears to a pond liner
If you are unsure how much underlay you will need for your pond go to our Pond calculator page and fill in your pond size.
We use Palletway or DX Transport to deliver Liners Online orders. We aim to process and dispatch all pond liner orders within 5 to 10 working days.
UK mainland = £15.50 for the delivery of all pond liner orders.
Remote Scotland and Isle of Wight = £65 for the delivery of all pond liner orders
UK off-shore islands = £125 for the delivery of all pond liner orders.
All smaller items (Total weight under 10kg) have a shipping cost of £9.70 to all the above locations.
If you are unsure which of the above area's you fall into, please get in touch via our contact us page or call us on 01526 399033. We will just need your postcode to verify the correct area.
Pond Liners & Underlay
All pond liners are manufactured to bespoke sizes, therefore we do not accept returns or exchanges for any pond liner once an order has been placed.
If your liner arrives faulty or incorrect due to an error on our part, please contact us as soon as possible. We will arrange collection of the liner and either repair or replace it at no additional cost.
All Other Products
For all other products, returns are accepted within 28 days of the delivery date.
The customer is responsible for organising and covering the cost of the return.
Items must be unused, in their original condition, and include all packaging and documentation.
If you have any questions or wish to arrange a return, please contact our customer service team.
The product carries a lifetime guarantee against leakage due to material degradation or faulty seams.
Lifetime shall mean the duration of the life of the person registered on the guarantee card while residing at the property where the pond liner was installed. The guarantee is not transferable to other persons or property and does not cover any form of commercial use. The liner must be installed in accordance with the instructions given and the water level maintained to the top of the liner during periods of evaporation. The guarantee does not cover any form of improper installation or use resulting in mechanical damage however caused, nor consequential loss, remedial or repair works.
Any liner subject to a claim under this guarantee shall be repaired, replaced or a refund of the original purchase price given at the discretion of Liners Online. The retailer’s official receipt should be kept in a safe place, as it will be required in the unlikely event of a claim under the terms of this guarantee.
These conditions do not affect your statutory rights.
Need Help With This Product?
Send us a message and one of our experts will get back to you as soon as possible. You can also call us on 07442 012158 or 01526 399033.