Soudaseal 215 for perimeter sealing currently only available in anthracite.  If you normally use silicone you may find the tooling of these slightly more onerous. If you are sticking on trims these are a good substitute for silicone. The Soudal Soudaseal 215, is an MS polymer whose applications include connection and expansion joints between window frames and walls. It has good adhesion to most common substrates. It may be overpainted by water based paints, although as usual check if compatible.