Crystal Clear Aquatics AAD00248 Pondseal Liquid Pond Liner, 1-Quart Pond seal is a water based, environmentally safe single component product that requires no mixing It yields a seamless membrane with excellent strength, elasticity and adhesion Pond seal can be used to repair plastic pre-form ponds, aged EPDM liners and concrete ponds It can also be used for waterproofing plant containers, fountains, wooden planter boxes, earthen ponds, reservoirs, spillways, waterfalls Comes with 1-quart container