The route is sixteen pitches in length with difficulties up to F8b.
Glowacz had previously attempted the route accompanied by the late Kurt Albert in the spring of this year but had not succeeded due to bad weather.
"Behind the Rainbow is in my opinion the perfect route. It gets more difficult towards the top and each pitch has its own character and the scenery is absolutely amazing. This adventure was unique for me," said Stefan Glowacz just hours after his ascent.
The climb was filmed and will no doubt be hitting screens soon.
Stefan is the founder of Red Chili and is sponsored by Wild Country