Glass upstand on curved wall

Hi all, we're looking to add a splashback and upstands to our kitchen. However one of the walls which we'd be putting an upstand on has a concave curve to it. It looks to be about 8mm curving inwards at the middle point. The width is just over a metre. Can we just fill it with extra sealant? Or will the fact it's not touching the wall all the way along cause problems?

Thanks in advance for any advice!