In a bike accident, I managed to damage a softshell jacket. The damage consists of some smaller holes, and the manufacturer provided me with a patch kit that is basically a piece of the material that is large enough be cut into patches for all the individual holes.
What is the best (i.e. most waterproof) way to sew/apply these patches without too much rain getting in through the seams?
Edit: I know that the question is really similar to How should I patch holes in a waterproof/breathable jacket?, but my situation is slightly different: I already have the material and am just wondering how to best use it.
Edit 2: I just noticed that some confusion might come from the fact that my softshell jacket actually has/is made of some membrane material and promoted as somewhat waterproof (5000mm hydrostatic head). (See Hardshell vs. Softshell jackets .) That's why I am worried about losing some of the waterproofness.