I purchased this to attach to my camper trailer. I bought it about 6 weeks ago but didn't around to installing it until today. I neatly attached the tape to the alloy channel I purchased to fit it. Siliconed it all up to make sure it was definitely waterproof and then find out the red colour doesn't work on one of the 5m sections. And now Amazon won't let me contact the seller because the return window has ended. Very annoyed!