Granger's Fabsil is a highly effective silicone-based water repellent treatment for all kinds of tent, tarpaulin, canopies & awning fabrics. It dries to an odourless & colourless finish. UV treatment will extend the life & performance of tent fabrics. One litre will cover upto 18m 2 of nylon, 7.5m 2 of light weight canvas & 5m 2 of medium weight canvas. A light 2 person tent is approx 6m 2. To use Fabsil, apply with a clean paintbrush using long, even strokes. Lightly rub in any droplets that form with soft, clean cloth, then allow to completely dry naturally before exposure to rain or dew.