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Was £107.78
RRP: £152.83 | Save £107.83 (71%)
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About the Flexiliner 5m x 4.5m 40yr Plus Underlay
Manufacturer: PondXpert
This bestselling pond liner is guaranteed for 40 years and comes with free underlay worth £40.50.
Super-strong pond liner sized 5m by 4.5m (16'5" x 14'9"). This flexible liner can be used to make many different shaped ponds - for example a rectangular pond sized 2.5m x 2.0m x 0.5m (8'2" x 6'6" x 1'8"). The PondXpert Flexiliner is the UK's bestselling brand of pond liner. These liners have been used in over 100,000 ponds internationally and will not let you down.
Flexiliner 5m x 4.5m 40yr Plus Underlay Features
Pond liner is black
LDPE 0.3mm thick
Pond underlay is 60gsm
40 year guarantee
Supplied with FREE matching underlay
Reviews for Flexiliner 5m x 4.5m 40yr Plus Underlay
8th October 2026
Excellent price and delivery
4th October 2026
What you would expect.
6th May 2026
Delivered promptley, fiitted perfectly, slightly bigger than ordered but can find a use for the spare.
26th March 2026
Great value for money 5x4m liner plus felt
13th October 2023
easy to use with pond liner,


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