Black Pond Liners with Underlay, L-Grade 200 GSM

Enhance the longevity and performance of your pond installation with our premium L-Grade 200 gsm black polyethylene pond liner paired with a 50 gsm non-woven fabric underlay. The liner delivers excellent tear-, puncture- and abrasion-resistance while remaining flexible enough to form any shape or contour. The accompanying underlay provides a crucial protective layer between the liner and the ground, cushioning against stones, roots and uneven substrates to prevent damage and extend service life.

The lightweight 50 gsm fabric underlay also acts as a weed barrier and helps distribute load evenly beneath the liner, reducing stress points and helping maintain liner integrity over time. Both materials are UV-stable and resistant to chemicals, ensuring your water feature stays leak-free and attractive season after season. Whether you’re installing a small garden pond or a larger water feature, this liner-underlay combination offers a simple, effective solution for reliable, long-term performance.

• Liner Material: UV-stable, high-strength polyethylene (200 gsm) for superior durability
• Underlay Material: Non-woven fabric (50 gsm) for puncture protection and load distribution
• Benefits: Tear-, puncture- and abrasion-resistant liner; underlay prevents ground damage and acts as a weed barrier
• Installation: Lay underlay smooth side up, then position liner; trim and shape as required
• Applications: Garden ponds, water gardens, rills, wildlife habitats and decorative water features