The best Pool liners, compared.
Top pick: PondKraft 4 m x 3 m liner – Highest score: 4.7 from 405 ratings and a stated 0.35 mm tri-laminate at about £22.99, for a prepared small pond. Best value: GARDENIX 2.5 m x 2.5 m 200 gsm – Best value at about £13.95 for a 2.5 m square at 200 gsm, if you accept gsm-only spec and shared review text. Updated October 2026.
None of them names a bead, a coping, or a wall height. You separate them by the thickness or gsm line, the rectangle after you add twice the depth, and the polymer the listing names. UK reviews of the 0.1 mm sheets often describe punctures from stones, gravel, or light use. A liner does not make water safe for children. How to choose family, thickness and size is in the [pool liner buying guide](/hub/swimming-pools/pool-liner/sub/pool-liner-buying-guide). A pool liner in the UK swimming-pool trade is usually a shaped vinyl skin for an above-ground or in-ground pool. Overlap, beaded, and liners are sold to a diameter and a wall height.
None of them names a bead, a coping, or a wall height. You separate them by the thickness or gsm line, the rectangle after you add twice the depth, and the polymer the listing names.
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Personal buying guide
Question 1 of 2
What are you lining?
The PondKraft sheet, listed at £22.99, is a 4 m by 3 m tri-laminate LDPE liner with bullets that print 0.35 mm and at least 200 g per square metre, plus a UV-stabilised coating on each side. On amazon.co.uk it is 4.7 from 405 reviews, the strongest star line in this comparison, which is why it is the top pick here. UK reviewers often call it strong, true to size, and straightforward to fit, including as a replacement for a small preformed pond; the brown side is sometimes chosen because it sits better against soil. The title promises a 25-year guarantee, but the listing does not include the terms, and one older review said it felt thinner than expected. Another buyer used the same sheet on a shed roof, so pond liner on the listing is not the only use people report. A rat hole was patched in one story, which underlines that even the thickest stated sheet in this set still wants a cleared base and geotextile underlay.
Pros
Cons
Best for: You are lining a small prepared garden pond or replacing a modest preformed shell and you want the largest review count beside a stated thickness above film.
Less suitable: You need overlap or beaded vinyl for an above-ground pool wall, or you expect 0.75 mm butyl from a pond specialist.
Specifications
Common questions
How thick is the PondKraft sheet?
The bullets say 0.35 mm, with a minimum of 200 grams per square metre, in a tri-laminate LDPE construction.
Does the listing include a guarantee?
The title says a 25-year guarantee. The listing does not include the guarantee terms.
Is it described as UV resistant?
The bullets say a UV-stabilised and rot-resistant coating on each side.
The GARDENIX 2.5 m sheet, at £13.95, is sold as a 200 gsm pond liner with no millimetre thickness on the title. It is 4.3 from 167 amazon.co.uk ratings, and the review blocks overlap the 1 m sibling listing, so the star line is not an independent trial of this size alone. Buyers who got on with it describe a small wildlife pond or a side pool shaped around rocks, and several call it strong or good value for the money. Others say it feels like a stiff tarp, or thin in the same text that also calls it thick, and one fountain install leaked with no obvious hole. The fitting bullet tells you to add depth to length and width, allow at least 50 cm overlap, and not cut until the liner is full of water. Underlay is not in the box. For about £14 you are buying a mid-size square when you accept gsm-only spec and shared review wording. It is the best value here because PondKraft already holds the top pick.
Pros
Cons
Best for: You are lining a compact wildlife or ornamental pond and you will follow the fill-then-trim sequence with geotextile beneath.
Less suitable: You need a stated 0.35 mm or 0.5 mm figure, or you want review counts that apply only to this ASIN.
Specifications
Common questions
What thickness is the 2.5 m GARDENIX?
The title states 200 gsm. A millimetre thickness is not given. The 0.2 cm figure in the dimensions field is not used as thickness.
When does GARDENIX say to cut the sheet?
The fitting bullet says not to cut until the liner is full of water and has been pulled down.
Does this box include underlay?
No. The bullet tells you to use underlay under the liner. The box is the 200 gsm sheet.
The 1 m GARDENIX square, at £6.72, uses the same 200 gsm wording and the same fitting bullets as the larger GARDENIX sheet, including the line about not cutting until the liner is full of water. It is 4.3 from 165 reviews, but the review text overlaps the 2.5 m listing, so treat the stars as one story told twice. UK buyers mention Belfast sinks, small drinking pools beside a main pond, and accurate measurements when the sheet worked. Criticism repeats the stiff tarp feel, cheap quality for the price, and a leak on a small fountain. This size is a small patch, not a full garden pond liner for a hole measured with twice the depth. Pair it with underlay if you use it at all, and use the size formula before you assume one metre covers a one-metre pond floor with depth added.
Pros
Cons
Best for: You need a small patch, a tiny container pond, or a trial piece and you already understand the size formula.
Less suitable: You are digging a full wildlife pond whose length and width need twice the depth added.
Specifications
Common questions
How big is this GARDENIX sheet?
The title says 1 m by 1 m at 200 gsm. Listing weight is 190 g.
Is a millimetre thickness stated?
No. The specification on the title is 200 gsm. Do not read the 0.2 cm dimensions figure as thickness.
Are the reviews separate from the 2.5 m sheet?
The review text overlaps the 2.5 m GARDENIX listing. The star line on this ASIN is 4.3 from 165.
The Tezhiie listing, at £25.99, sells a 2 m by 4 m black LDPE sheet with bullets that print both 20 mil and 0.5 mm, and it says you can cut it with scissors to the pond shape. It is 4.3 from 23 reviews on amazon.co.uk, so the stars look respectable but the sample is thin compared with PondKraft’s 405. UK reviewers who liked it mention easy cutting and decent waterproofing when the underlay is good; one said it was hard to tear with a proper cushion beneath. Others report a split within minutes of fitting, folds welded so the usable area shrank, or punctures on stones and nails. Koi appears only as a listing question, not an answered depth rating. If you need the highest stated millimetre figure in this comparison, Tezhiie is the print to read, but plan spare length and treat stuck folds as a reason to measure before you finish the hole.
Pros
Cons
Best for: You want a longer 2 m by 4 m rectangle and you will lay geotextile underlay, keep stones out, and unpack the sheet carefully before the hole is final.
Less suitable: You need hundreds of UK reviews for confidence, or you are lining a koi pond to specialist depths.
Specifications
Common questions
How thick is the Tezhiie liner?
The bullets print both 20 mil and 0.5 mm for this 2 m by 4 m LDPE sheet.
Can you cut it?
The listing asks if it is easy to cut. The bullets say you can cut it with scissors to the pond shape.
Does the listing confirm koi use?
Koi is only a question on the listing. The bullets speak about aquatic life in general and say to remove sharp objects before laying.
The MIKIICOCO sheet, at £10.98, is a 3 m by 2 m HDPE rectangle with bullets that claim UV resistance, harmless use for plants and fish, and cutting to any size. It is 4.1 from 186 amazon.co.uk reviews, a respectable count for a budget sheet, but the listing does not state a thickness you can compare with PondKraft’s 0.35 mm or Tezhiie’s 0.5 mm. Reviewers split between easy fitting and low price on one side and overnight leaks, pinholes, and too thin on the other; one buyer said it was not rubberised. The dimensions line that looks like 0.2 cm is a listing field, not a verified sheet depth. If you need a large cheap rectangle in this set and you will check the feel on delivery, measure MIKIICOCO against your twice-depth sum. Otherwise start with a sheet that prints millimetres. The fish-safety wording is a bullet, not a certificate.
Pros
Cons
Best for: You have calculated your pond size with twice the depth and this rectangle fits, and you will use underlay on a cleared base.
Less suitable: You want a stated 0.35 mm or thicker before you dig, or you expect butyl-style flexibility.
Specifications
Common questions
How thick is the MIKIICOCO liner?
A thickness is not stated. The dimensions line 0.2 x 3 x 1 cm is a listing field, not a sheet thickness.
What is it made of?
The bullets say HDPE. A review says it is not rubberised.
Can it be cut?
A bullet says it can be cut to any size and bent around pond rocks.
The WARM&LOVE listing, at £6.99, sells a 2 m by 3 m, 0.1 mm HDPE sheet whose title also says swimming pool film and cuttable pond liner. It is 3.8 from 500 amazon.co.uk reviews, the highest count in the set, yet the sampled reviews repeat that the film is very thin. Some buyers used it as an extra layer under gravel in a fish pond or to line a raised planter, which matches what 0.1 mm can do. Others report holes from a single rock or splits unless spare length is kept during fitting. The title’s swimming-pool wording is not overlap vinyl sized to a wall height; it is still a flat rectangle. High review volume here does not overturn the millimetre print. It records how many people bought thin film and then described it as thin.
Pros
Cons
Best for: A planter, a temporary layer, or a very small soft-base feature where thickness is not the main job.
Less suitable: A primary liner for a stony dug pond or any pool with a bead track.
Specifications
Common questions
Does this replace a swimming pool liner?
The title says swimming pool film. The stated thickness is 0.1 mm HDPE, 2 m by 3 m. It is not sold as overlap, beaded, or J-hook vinyl.
How thick is it?
The title says 0.1 mm.
What do reviewers repeat?
In the sampled reviews, thin is the main complaint. Some buyers used it for a planter or as an extra layer under gravel.
The mawmuaw pack, at £8.99, pairs a 2 m by 2 m, 0.1 mm HDPE sheet with ten 16 cm fixing nails. It is 3.7 from 108 amazon.co.uk reviews, and the text splits between small barrel water features that worked for a season and full pond attempts that failed. Critics call it rubble-sack plastic, say gravel holed it after stretch, or report ducks punching through a shallow liner within a month. The nails are a hint that the seller expects you to pin edges, not that the film replaces underlay on stones. UV resistance is claimed, but 0.1 mm is the same band as the WARM&LOVE sheet and far below specialist 0.75 mm rubber guidance from pond retailers. Treat it as a disposable liner for a tiny feature, not the main membrane for a dug wildlife pond.
Pros
Cons
Best for: A half-barrel or temporary water feature with a soft base and careful handling.
Less suitable: A permanent garden pond with stones, children nearby, or duck traffic.
Specifications
Common questions
What comes in the box?
The bullets say one 2 m by 2 m, 0.1 mm HDPE liner and 10 fixing nails of 16 cm.
How thick is it?
The title and bullets say 0.1 mm.
Do reviews treat it as a heavy pond liner?
Some UK reviews used it for a barrel or a water feature. Others call it plastic sheeting and describe holes from gravel or ducks.
The QWORK sheet, at £8.99, is a 2 m by 2 m black piece with bullets that print 0.25 mm HDPE while the title says PVC pond liner. The listing does not resolve the plastic mismatch. It is 2.4 from 9 reviews, and the UK review in the text says it tears very easily. Other blocks mention smell or outdoor breakdown and are not used here as UK evidence. At the same shelf price as other thin sheets, the star line and the material conflict weigh against it. Safe-for-fish wording on the bullets is a claim, not a strong UK success story in this set.
Pros
Cons
Best for: You already have spare material elsewhere and you treat this as a disposable trial.
Less suitable: You want a primary liner for a dug pond, or you need the polymer name to agree with itself.
Specifications
Common questions
Is the QWORK sheet PVC or HDPE?
The title says PVC. The first bullet says HDPE. Both are printed. The listing does not resolve them.
How thick is it?
The bullets say 2 m by 2 m and 0.25 mm.
What do the reviews say about tearing?
The UK review says it tears very easily. The star line is 2.4 from 9.
The kanghelong sheet, at £5.99, is a 2 m by 2 m, 0.1 mm HDPE piece with bullets that mention landscape pools and safe use for fish and plants. It is 1.0 from 1 review on amazon.co.uk, and that reviewer says the packaging states greenhouse film, describes the material as thinner than a millimetre, and advises against buying it as a pond liner. With no counterbalancing UK success story on the listing, the lowest price in the comparison is also the weakest evidence. Cutting by hand is claimed, but that does not add puncture resistance on stones. Fish-safe and heavy-duty wording were not verified.
Pros
Cons
Best for: Temporary greenhouse or craft use if you accept the single negative review.
Less suitable: Any dug pond where underlay and thickness matter.
Specifications
Common questions
How thick is the kanghelong sheet?
The listing question is answered by the bullet: 0.1 mm HDPE, 2 m by 2 m.
What does the review say?
The only review, 1.0 from 1, says it is not heavy duty and that the pack states greenhouse film.
Can it be cut?
The bullets say it can be cut by hand to fit irregular shapes.
The WSNDM listing, at £11.29, describes a 2 m by 3 m single-layer polyethylene sheet at 0.2 mm, with bullets that mention sun resistance and fish safety and a title that also says large pool padding. The saved listing has no amazon.co.uk star rating or review text, so there is no buyer record to weigh against the words on the page. That gap matters in a category where the thinnest films collect puncture stories once gravel or ducks appear. The stated 0.2 mm sits above the 0.1 mm films and below PondKraft’s 0.35 mm print. Until reviews appear, you are buying specification text only, and the pool-padding wording is not overlap vinyl for a steel wall. Fish-safety wording on the bullets was not verified.
Pros
Cons
Best for: You accept an unrated listing and you treat the sheet as a light-duty layer with full underlay.
Less suitable: You want hundreds of UK reviews before you line a pond, or you need swimming-pool vinyl.
Specifications
Common questions
How thick is the WSNDM sheet?
The bullets say a 0.2 mm single layer of polyethylene, 2 m by 3 m.
Is there a UK star rating?
The saved listing has no customer-review line, so the rating is n/a.
Does the title call it pool padding?
Yes. The title says large pool padding as well as fish pond, planter, fountain, and waterfall.
The YWKJDDM sheet, at £9.88, is a 2 m by 2 m black HDPE piece with bullets that print 0.2 mm and say you can cut it to size. Amazon’s browse rank places it in pond liner underlays, but the listing describes a polyethylene sheet, not a geotextile fleece sold by gsm. The title ends with (2) while the bullet says one seamless sheet. The count used in this comparison is the bullet. There is no review line on the saved listing, so fit, punctures, and longevity are unknown from buyers. Do not treat the underlay rank as fleece. It is another thin membrane, and it still needs the twice-depth sum if you use it as the primary liner.
Pros
Cons
Best for: You already measured with twice the depth and a 2 m square truly fits, and you accept a listing with no reviews.
Less suitable: You need geotextile underlay only, or you want rated buyer feedback.
Specifications
Common questions
Is this underlay or a liner?
Amazon ranks it in pond liner underlays. The bullets describe one 0.2 mm HDPE sheet, 2 m by 2 m, not a geotextile fleece.
How many pieces are in the box?
The bullet says one seamless sheet. The title ends with (2). The count used here is the bullet.
Can it be cut?
The listing asks that question. The bullet says you can cut the sheet to the size you want.
Eleven amazon.co.uk listings, saved on 19 October 2026, were scored from 0 to 100. Amazon evidence is 30, listing fit is 25, review outcome is 30, and value in this set is 15. A star line is not a puncture test, a fish-safe certificate, or proof of a 25-year guarantee. The highest score is the top pick, once. Best value is decided in the value block, once, and it is not the top pick. There is no laboratory test.
Amazon evidence
30%The amazon.co.uk star rating, with more weight when the count is in the hundreds and the texts match the ASIN. A 4.7 from 405 outranks a 4.3 from 23. A listing with no review line is heavily reduced.
Listing fit
25%A stated thickness or gsm that agrees with itself, a named polymer, a rectangle you can plan around, and UV or fish words that match the bullets. Conflicting plastics, a missing thickness, or a dimensions field mistaken for sheet depth score down.
Review outcome
30%A sheet that holds a small pond after underlay, fits true to size, or survives careful fitting scores. Splits on install, stuck folds, overnight pinholes, punctures on 0.1 mm film, or greenhouse-film complaints are deductions.
Value
15%Shelf price in GBP against stated thickness and size within this set. This block decides the best value badge. It does not break a tie on the headline score, and it is not given to the top pick.
Choose the family before the star count. Overlap, beaded, and J-hook vinyl are shaped swimming-pool liners. The eleven sheets here are flat polyethylene or mixed-label rectangles, about £5.99 to £25.99 on amazon.co.uk, saved on 19 October 2026. Quality in this set is a thickness or gsm figure that agrees with itself, a size that still fits after you add twice the depth, and reviews that describe a real pond rather than a puncture.
A pool liner in the UK swimming-pool trade is usually a shaped vinyl skin for an above-ground or in-ground pool. Overlap, beaded, and J-hook liners are sold to a diameter and a wall height. Dolphin Leisure lists 16 thou overlap liners for 48 inch and 52 inch walls from £233.70 for a 12 ft diameter. None of the eleven amazon.co.uk sheets on this page states a bead, a diameter, or a wall height.
kanghelong, mawmuaw, and WARM&LOVE print 0.1 mm. UK reviews of that band describe punctures from stones, gravel, or ducks’ feet, and one review calls a pack greenhouse film. Heavy duty, fish safe, and UV lines on the bullets were not verified. World of Water points longer-lived ponds at 0.75 mm or 1 mm rubber, which is not in this set.
Islington Council and Newcastle City Council: liner length is pond length plus twice the maximum depth, and the same for width, plus an edge. A 2 m by 2 m sheet does not line a 2 m by 1.2 m hole that is 0.5 m deep. GARDENIX says to allow at least 50 cm of overlap and not to cut until the sheet is full of water.
If the pool has coping, a bead track, or a J-hook, the replacement is shaped vinyl for that wall height. None of these ASINs states a bead, a diameter, or a wall height. A title that says swimming pool film or pool padding is still a flat rectangle. Dolphin Leisure’s overlap vinyl starts at £233.70, outside this shelf.
Start with the object. A shaped swimming-pool liner is overlap, beaded, or J-hook vinyl, sold to a diameter and a wall height. Dolphin Leisure’s plain overlap liners for 48 inch and 52 inch walls start at £233.70 for a 12 ft diameter. None of the eleven sheets here names a bead. They are flat HDPE, LDPE, polyethylene, or a mixed PVC and HDPE label, from about £5.99 to £25.99. Then read the thickness the listing actually prints. 0.1 mm: kanghelong, mawmuaw, WARM&LOVE. 0.2 mm: WSNDM and YWKJDDM.
The sheet has to cover the hole after the sides are included. Islington Council and Newcastle City Council use the same formula: length equals pond length plus twice the maximum depth, and the same for width, plus an edge. GARDENIX adds at least 50 cm of overlap and says not to cut until the liner is full of water and pulled down. A 1 m square, or a 2 m square, fails most dug ponds once that sum is done. PondKraft’s 4 m by 3 m rectangle is the largest sheet in this set.
Three typical situations, each with a recommendation from this comparison.
You have cleared stones, you will lay geotextile underlay, and you want a stated thickness above film with a large UK review count. The PondKraft 4 m by 3 m sheet at about £22.99 prints 0.35 mm tri-laminate LDPE and 4.7 from 405 ratings. It is the top pick in this set. It is not butyl, and the 25-year line on the title does not include the terms.
You want a mid-size square under £15 and you accept a gsm figure instead of millimetres. The GARDENIX 2.5 m sheet at about £13.95 is 200 gsm, 4.3 from 167 ratings, and the best value here. The review text overlaps the 1 m GARDENIX listing. Follow the fill-then-trim note and add underlay. It is not shaped pool vinyl.
You need about 2 m by 4 m and the highest stated mil figure in this set, and you will unpack the sheet before the hole is final. The Tezhiie LDPE liner at about £25.99 prints 20 mil / 0.5 mm and is 4.3 from 23 reviews. Splits on fitting and stuck folds are in the UK text. Koi is a listing question, not an answered depth rating.
The top pick is the PondKraft 4 m by 3 m sheet at about £22.99. It is the highest score in this set: 4.7 from 405 amazon.co.uk ratings, a stated 0.35 mm tri-laminate LDPE, and a minimum of 200 g/m². It is not EPDM and not shaped pool vinyl, and it still needs a cleared base and underlay. The title states a 25-year guarantee, but the terms are not on the listing. The best value is the GARDENIX 2.5 m square at about £13.95: 4.3 from 167 ratings, sold as 200 gsm with no millimetre figure, and review text that overlaps the 1 m GARDENIX listing. These scores are not a puncture test.
PondKraft 4 m x 3 m liner
Highest score: 4.7 from 405 ratings and a stated 0.35 mm tri-laminate at about £22.99, for a prepared small pond.
GARDENIX 2.5 m x 2.5 m 200 gsm
Best value at about £13.95 for a 2.5 m square at 200 gsm, if you accept gsm-only spec and shared review text.
Editorial
Peter F. is the editor for DIY & tools at productscompared.co.uk. Comparisons in this category are checked against amazon.co.uk listings, review evidence and public UK sources.
Guides on what to look for, how to use a product, and common mistakes.
Public UK sources used for this comparison. Listing prices, stars and review counts are the amazon.co.uk figures saved for this set on 19 October 2026.
This page contains affiliate links to amazon.co.uk. If you buy through them, we may earn a commission at no extra cost to you. Prices, stars and review counts are the UK listing lines saved on 19 October 2026. We did not run a lab test.
