If you want to put paint on it don't use anything with silicone in it. Paint will NOT stick to silicone. Bostick 920 is the best sealer I have worked with. You can find it at any Marine type store. You can paint it and it skins over fast. Just tape the edges you want to caulk and run a bead down it. Then wipe down the tape lines with a finger and then remove the tape. This makes a nice bead. Just my 2 cents...