Update: The impregnation is still super, only weak point is the seam that runs centrally through the sail. For stronger, long-lasting rains are formed on the bottom of the sail at the intersection drops (see photo under "customer images"). When required the use of a seam poet would (can be liquid, apply and can be found here at Amazon for around EUR 8 (seam sealer liquid PROOF IT Seam)) makes sense.
