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200gsm Black Flexible Pond Liner with Underlay, 6m x 6m

200gsm Black Flexible Pond Liner with Underlay, 6m x 6m

Regular price £39.39
Regular price Sale price £39.39
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95 in stock

  • Build your garden pond: a 6m × 6m nominal sheet of flexible 200gsm PE for the water-holding layer.
  • Follows your pond's contours: flexible polyethylene fits around curves, shelves and changes in depth without a rigid preformed shape.
  • Black face with grey reverse: UV-resistant PE for outdoor ponds and garden water features.
  • Underlay included: 4 separate 3m × 3m sheets of 50gsm fabric for laying beneath the liner.
  • One liner supplied: cut-size tolerance ±5%. Allow for depth and edging; prepare smooth ground and remove sharp debris before fitting.
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Description

A 6m square sheet for your pond layout

This bundle supplies one nominal 6m × 6m 200gsm polyethylene pond liner with 50gsm fabric underlay. The liner's flexible sheet can follow a prepared excavation, from curved sides to planting shelves. Equal cut dimensions give you the same nominal material allowance in both directions.

6m × 6mNominal liner cut size
36m²Flat liner area
200gsm PEBlack face, grey reverse
50gsmFabric underlay included

Allow material for the whole excavation

The nominal 36m² area describes the flat sheet. It includes the material that will cover the pond base, depth, sides, shelves and perimeter. It is not a 36m² water-surface allowance.

Measure the longest and widest routes along the actual contours, then add the allowance for your edge finish. Compare each complete measurement with the nominal 6m side, allowing for the ±5% cut-size tolerance. A square sheet can line a curved pond, but both routes still need to fit.

6m6m36m²nominal flat liner areaCut size ±5% · not the finished pond size

Prepare the layers before the pond is filled

The fabric underlay sits beneath the PE liner. Check its coverage and the supporting ground first, then ease the sheet into the contours without stretching it tight.

Illustrative preparation of black polyethylene pond liner over fabric underlay
Illustrative preparation. Liner and fabric underlay are included; landscaping and installation accessories are not.

Clear the supporting surfaces

Remove sharp stones, roots and debris from the base, sides and shelves. Smooth the areas beneath the fabric.

Plan fabric coverage

Arrange the underlay and any overlaps around the contours. Assess whether the actual ground conditions need further protection beyond the included lightweight fabric.

Position with room at the edges

Let the flexible sheet settle into the excavation without tension across gaps. Check the position and perimeter allowance before adding water.

Contents and material specifications

One nominal 6m × 6m 200gsm PE pond liner with 50gsm fabric underlay. The liner is UV-resistant for outdoor pond use, with a black face and grey reverse. Edging, stones, plants and installation accessories are not included.

GSM is the weight of each material per square metre. The liner and fabric have separate ratings, not a combined liner weight or thickness measurement. The liner is polyethylene rather than EPDM rubber.

Questions about the 6m × 6m bundle

Can a 6m square sheet line a curved pond?

Yes, provided both complete contour measurements fit within the available sheet. Allow material for depth, sides, shelves and the edge finish, as well as the ±5% cut-size tolerance.

Is the liner area the same as the water-surface area?

No. The nominal 36m² is the flat sheet area. Material used for the pond's depth, sides and edging is part of that area. Measure along the excavation to check the fit.

Is underlay already included?

Yes. This bundle includes 50gsm fabric underlay. Plan its coverage and overlaps, clear sharp objects from the ground first, and assess whether additional protection is needed for your actual excavation.

Product information & technical details

SKUPLB6X6-001+
Product typePond Liner with Underlay
Size6m x 6m
Length6m
Width6m
GSM200gsm
ColourBlack, Grey
MaterialPolyethylene (PE)
Nominal flat liner area36m²
Included underlay4 × 3m × 3m sheets of 50gsm fabric; separate pieces, allow for overlaps.
Cut-size tolerance±5%

Quantity supplied: one liner with fabric underlay. Intended use: ponds.

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.

Please see our shipping policy for further information.

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.

Please see our warranty policy for further information.

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.

Please see our refund policy for further information.

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.

Please see our shipping policy for further information.

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.

Please see our warranty policy for further information.

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.

Please see our refund policy for further information.