Danny,

I buy my gap seals from “wings and Wheels” – they have also pictures and sketches on their site of how to mount them. My ex co-workers from GROB aircraft used their services (only for the gliders) for many years and were happy with them.

Gap seals in general: I saw a speed increase may be of 2 kts at the most – it is something that I question if I would do it again. I can’t take them off again because when I removed old tape the paint came off on some spots.

On my 4P gap seals have a very limited life time. I lose one about every 15 – 20 hrs of flight. No big deal – no safety hazard – it is just gone after the flight. I pay attention now that on decent I keep the airspeed from going into the yellow (200kts) too far. If I fool around with the airplane eg. taking dives until I hit red line (270kts) , flying over the runway full throttle and pulling it straight up….. I can almost bet that one seal is missing.

I pay really good attention that all the surfaces are clean and free of old glue, I apply high pressure when initially applying the tape, I tried to use a heat gun, I rough the surface of the mylar (usually the double sided tape is still on the wing), I make sure that the inner tapes are still there and sealed. In short: I am a person that works usually very detailed and I put a lot of effort in applying the seals but I can’t get them to stay on for good…..

In my opinion these seals are made for lower speeds than what we see in our planes. If someone can give me some ideas of what other products / procedures to use I would be very happy….

These are just my thoughts and there might be a better solution out there.

Ralf