The pond liner for a natural swimming pond should definitely be UV resistant. UV rays from the sun can break down materials over time, causing the liner to degrade, crack, or become brittle. This can lead to leaks and other issues that disrupt the pond’s water quality and ecosystem.
A UV-resistant liner helps ensure that your pond remains durable and functional for many years. Materials like EPDM rubber and RPE are often chosen for their UV resistance, as they can withstand prolonged exposure to sunlight without deteriorating. This is especially important in areas with hot summers or high sun exposure.