Silicone sealants and adhesives are extremely versatile. They bond to almost anything and retain flexibility over a long period of time.
Clear sealants fall into two main categories: silicone, and acrylic.
Silicone sealant is very flexible, thus allowing for thermal expansion, and it forms a strong bond between non-porous materials such as glass and metal. However, it can be a challenge to paint over some clear silicone sealants.
Clear acrylic caulk is a water-based product, so it can be cleaned easily using ordinary tap water. It’s also virtually odorless and can be painted over.