Description
Our Underlay / Overlay is a 2.5-3mm thick spun bound Polypropylene material in black that is designed to be puncture resistant and is ideal for protecting your pond liner from roots, small pebbles or rough/uneven concrete and wooden surfaces. Our specification sheet can be downloaded from the tab below.
Butyl rubber remains the top choice for professional pond builders and water gardeners due to its highly flexible, durable nature and because it is totally non-toxic and does not harm any aquatic or plant life.
It is long-lasting and completely UV stable so will not crack or split if left exposed to normal sunlight.