What is the best make silicone sealant?
Different Silicone sealants have very different adhesive qualities. Additionally, how well you clean the surface(s) to be sealed will make a great difference in it’s performance. You simply need to purchase the right sealant for the right application. When you go to your hardware store, look for the “Low Modulus” type of silicone, as it will perform best on all surfaces (but is especially designed to adhere to PVC and other surfaces. Almost all are paintable. Make sure you buy one that is. Anyone who tells they are not paintable knows little of what they speak. Read the tube. If it says paintable, guess what? It is. http://www.geadvancedmaterials.
