Provides additional tear and puncture protection from roots, stones or any other sharp objects underneath pond liner. Provides enhanced soil stability and erosion control. Underlayment can be used on top of liner as well to protect from punctures when adding gravel or rocks on top of liner.
Creates a flexible, water-tight seal between liner and substrate behind liner. Can be used with any EPDM rubber liner. 10 oz. tube provides approx. 10 lineal foot @ 3/8″ bead coverage.