not just of land sufficient as indicated

Have ordered 2 bottles and wanted my caravan awning (5m x 2.50m) deal with it, unfortunately, did not come so far, a whole bottle went away alone for the roof, not even applied thickly, the runners have emerged. Then it went a whole bottle for the two sides. Conclusion: One bottle applied thinly for an area of ​​5x2.5 meters.
Handling is quite good, I still have 2 reorder me now, and the effect on water resistance I be able to learn later.