GeoTextile Woven Underlayment should be used for all pond installations as an under liner. Just lay the GeoTextile Underliner down prior to laying your Pond Liner.
GeoTextile can also be used on top of the liner when you will be placing heavy objects such as boulders. This product will not deteriate in the water.
Top grade
6oz per square yard
Provides protection to liner
Allows for gases to escape from under the liner
75 Square Feet Per Mini Bundle
Buy Multiple Bundles and Save
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SLGF7.5
Felt underlayment 7.5' x 300' Sold by running foot