Description
A tougher liner for the pond you dig
Flexible 3m x 4m black PVC at 450gsm: a thicker, tougher sheet than 200gsm PE that still folds into the curves and shelves of a garden pond.
450gsm PVC: tougher than PE, easier than rubber
This liner is a flexible sheet of black PVC. 450gsm means each square metre weighs 450 grams, more than twice our 200gsm PE liner, so the sheet is thicker and stands up better to tears and punctures. It is still far lighter than 1100gsm EPDM rubber: a 3m x 4m sheet weighs about 5.4kg, so it is easy to carry to the pond and unfold.
| Material | PVC, black |
|---|---|
| Material weight | 450g per m² (450gsm) |
| Thickness | 0.3mm (300 microns) |
| Sheet size | 3m x 4m, cut size, can vary by up to 3% |
| Sheet area | 12m² |
| Liner weight | About 5.4kg |
| Safe for fish | Yes, and for other pond life |
| UV resistance | Yes |
| Supplied | Folded and bagged |
Which pond liner is right for you?
| 200gsm PE | 450gsm PVC (this liner) | 1100gsm EPDM | |
|---|---|---|---|
| Material | Polyethylene, black and grey | PVC, black | EPDM synthetic rubber, black |
| Weight per m² | 200g | 450g | 1100g |
| Sizes | 17, from 1m x 1m to 10m x 10m | 14, from 1m x 1m to 8m x 8m | 11, from 1m x 1m to 10m x 10m |
| Underlay | Sold separately or as a kit | An option on every size | Sold separately |
| Price per m², 3m x 3m | £1.21 | £2.65 | £6.99 |
| Choose it for | The lowest cost per square metre | A tougher sheet at a mid price | Stretching over deep shelves and tight curves |
Prices per m² are for a 3m x 3m liner on its own, at today's prices. Prefer a natural look? Our pebble print PVC liners are the same 450gsm sheet with a printed pebble face.
What a 3m x 4m sheet builds
A pond about 1.5m x 2.5m and 45cm deep, with 30cm of liner spare at every edge to tuck under stones, slabs or turf. That suits a small garden pond with a planting shelf.
- Where the sheet goesThe liner runs down one side, across the bottom and up the other. Each way it covers the pond, twice its depth and the spare at both edges.
- Deeper means smallerEvery extra 10cm of depth takes 20cm off the pond's length and width. If your pond is at this sheet's limit, choose the next size up, 4m x 4m.
- Underlay for this sizeThe With underlay option includes one 3m x 5m sheet of 50gsm fabric underlay.
- One sheet per pondLine the pond with a single sheet. Two sheets need joining tape or adhesive to seal the seam, which we do not sell, so choose a size that covers your pond on its own.
What size pond liner do I need?
Enter your pond dimensions in metres to find the liner size you need.
Sheet length = pond length + 2 x depth + 2 x edge allowance. Width uses the same sum. Not to scale.
Made for a small garden pond with a planting shelf
From hole to pond
-
Dig and line with underlayShape the hole with shelves, then always lay underlay first to protect the liner from stones and roots.
-
Ease in the linerUnfold it over the hole, leave plenty spare round the rim and let it settle into the shelves.
-
Fill, then finish the edgeWeight the loose edge and fill slowly. Once the liner has settled, trim it and cover the rim with stones or slabs.
Frequently asked questions
What's included?
With underlay: one 3m x 4m black PVC pond liner and one 3m x 5m sheet of 50gsm fabric underlay. Liner only: the liner on its own, for when you already have underlay.
Do I need underlay?
Yes. A pond liner should always be laid on underlay, never straight on soil: it cushions the liner against stones and roots. Choose the With underlay option to get both together, or see our pond liner underlay if you already have a liner.
Is 3m x 4m the finished pond size?
No. The sheet also covers the pond's depth, shelves and edging, so the finished pond is smaller. 3m x 4m is the cut size, and the finished sheet can vary by up to 3%.
Is it safe for fish?
Yes. The liner is safe for fish and other pond life.
Will it stand up to sunlight?
Yes. The PVC is UV resistant and should last for many years in a garden pond. Like all plastics it ages slowly in sunlight, faster in full sun than in shade or under water, so cover the edge with stones, slabs or turf to protect it.
Can I join two liners for a bigger pond?
We recommend one sheet per pond. Two sheets need joining tape or adhesive to make a watertight seam, and we do not sell either. Choose a size that covers the whole pond, or see our EPDM liners, up to 10m x 10m.
How is it delivered?
Folded and bagged. Unfold it next to the pond and let it relax before you ease it into the hole.
Product information & technical details
- SKU
- PL-PVC-BLACK-3X4-001+
- Product type
- Size
- 3m x 4m
- Length
- 4m
- Width
- 3m
- GSM
- 450gsm
- Weight
- About 6.2kg with underlay
- Material
- Polyvinyl chloride (PVC)
- Colour
- Black
- Thickness
- 300 microns / 0.3mm
- UV resistance
- Yes
- Flat sheet area
- 12m²
- Cut-size tolerance
- Up to 3%
- Supplied
- 1 liner
- Underlay
- Included, one 3m x 5m sheet of 50gsm fabric underlay
All delivery times are estimates and not guaranteed. Orders placed before 1 pm, Monday to Friday (excluding bank holidays), will be dispatched the same day, while orders placed after 1 pm will be dispatched by the end of the next working day.
If an invalid postcode or address is provided, the order will be cancelled without further notice, as we are unable to modify addresses or print labels for invalid postcodes.
Our standard delivery option is Royal Mail Tracked 48, which typically takes 3–5 business days. If you need your order more quickly, Expedited delivery via Royal Mail Tracked 24 is available, offering a 1–2 business day service.
Large or bulky items may be sent via courier at our discretion and are usually dispatched for next-day delivery. Please note that we only ship to mainland UK addresses; delivery to non-mainland locations, including the Highlands & Islands, may not be available for large or heavy items. If your address falls into one of these areas and you wish to purchase such items, please contact us with your postcode and order details before placing your order. If we cannot ship to you, you are welcome to arrange your own courier for collection.
All products, unless otherwise stated, come with a standard manufacturer warranty against faulty workmanship.
If your product fails within six months of delivery, please contact us with your order reference number, a description of the issue, and clear images illustrating the fault.
Should your item require a return for further investigation, it is your responsibility to arrange and cover postage back to us.
If we are unable to repair the fault, we may offer either a replacement or a full refund.
In cases where the item is inspected and found not to be faulty, or where damage is determined not to be due to manufacturing defects, you will not be entitled to a refund or replacement. We will then either return the item to you via standard post or dispose of it at your request.
You may return any order within 14 days of delivery. As soon as you receive your items, please inspect them carefully, taking reasonable care to keep both the product and its packaging clean and undamaged. If you discover an error or defect after 14 days, we reserve the right to decline your return. If your product fails or breaks after this 14-day time window then your order may be eligible for a warranty claim, please see our warranty information for more details.
To initiate a return, please contact us via our contact form to obtain a return authorisation and the correct returns address (different from the address on your invoice). This can also be done through your 'recent orders' page on your account if you are registered with Shop. Returns sent without prior authorisation will be discarded.
Returned items must be in the same condition in which you received them: unworn or unused, with tags attached and in their original packaging. You must include either a copy of your invoice or a slip with your order reference number inside the parcel. Please be sure not to obscure your return reference number on the label.
If you refuse delivery or reject the parcel without prior notice, we will inspect the returned package and issue a refund upon receipt. Although there is no restocking fee, we will deduct the cost of the return postage label (£3.35) from your refund.
If the returned item or its packaging shows signs of use, damage, or staining, we may deduct up to 50% of the order value, or refuse the return entirely, depending on its condition. Examples include damaged tags, stained, modified or damaged packaging, or missing components.
For faulty, incorrect, or damaged items, please contact us before sending anything back so we can attempt to resolve the issue directly. If we agree that a return is necessary due to our error, we will provide you with a pre-paid return label.
Products that have been modified or damaged through customer action are not eligible for return. This includes, but is not limited to, items that have been cut, trimmed or otherwise altered (such as a tarpaulin or pond liner resized to your specifications), or any product showing damage beyond normal inspection handling.
All delivery times are estimates and not guaranteed. Orders placed before 1 pm, Monday to Friday (excluding bank holidays), will be dispatched the same day, while orders placed after 1 pm will be dispatched by the end of the next working day.
If an invalid postcode or address is provided, the order will be cancelled without further notice, as we are unable to modify addresses or print labels for invalid postcodes.
Our standard delivery option is Royal Mail Tracked 48, which typically takes 3–5 business days. If you need your order more quickly, Expedited delivery via Royal Mail Tracked 24 is available, offering a 1–2 business day service.
Large or bulky items may be sent via courier at our discretion and are usually dispatched for next-day delivery. Please note that we only ship to mainland UK addresses; delivery to non-mainland locations, including the Highlands & Islands, may not be available for large or heavy items. If your address falls into one of these areas and you wish to purchase such items, please contact us with your postcode and order details before placing your order. If we cannot ship to you, you are welcome to arrange your own courier for collection.
All products, unless otherwise stated, come with a standard manufacturer warranty against faulty workmanship.
If your product fails within six months of delivery, please contact us with your order reference number, a description of the issue, and clear images illustrating the fault.
Should your item require a return for further investigation, it is your responsibility to arrange and cover postage back to us.
If we are unable to repair the fault, we may offer either a replacement or a full refund.
In cases where the item is inspected and found not to be faulty, or where damage is determined not to be due to manufacturing defects, you will not be entitled to a refund or replacement. We will then either return the item to you via standard post or dispose of it at your request.
You may return any order within 14 days of delivery. As soon as you receive your items, please inspect them carefully, taking reasonable care to keep both the product and its packaging clean and undamaged. If you discover an error or defect after 14 days, we reserve the right to decline your return. If your product fails or breaks after this 14-day time window then your order may be eligible for a warranty claim, please see our warranty information for more details.
To initiate a return, please contact us via our contact form to obtain a return authorisation and the correct returns address (different from the address on your invoice). This can also be done through your 'recent orders' page on your account if you are registered with Shop. Returns sent without prior authorisation will be discarded.
Returned items must be in the same condition in which you received them: unworn or unused, with tags attached and in their original packaging. You must include either a copy of your invoice or a slip with your order reference number inside the parcel. Please be sure not to obscure your return reference number on the label.
If you refuse delivery or reject the parcel without prior notice, we will inspect the returned package and issue a refund upon receipt. Although there is no restocking fee, we will deduct the cost of the return postage label (£3.35) from your refund.
If the returned item or its packaging shows signs of use, damage, or staining, we may deduct up to 50% of the order value, or refuse the return entirely, depending on its condition. Examples include damaged tags, stained, modified or damaged packaging, or missing components.
For faulty, incorrect, or damaged items, please contact us before sending anything back so we can attempt to resolve the issue directly. If we agree that a return is necessary due to our error, we will provide you with a pre-paid return label.
Products that have been modified or damaged through customer action are not eligible for return. This includes, but is not limited to, items that have been cut, trimmed or otherwise altered (such as a tarpaulin or pond liner resized to your specifications), or any product showing damage beyond normal inspection handling.