100% Silicone is one of the best types of sealants, and this may just be the best I've used. But be warned, it is extremely difficult to get a nice perfect bead, even if you're good at caulking. Basically you can only touch it once- as soon as you lift your finger for any reason (to wipe away excess caulk, or continue the bead), it's nearly impossible to continue from where you left off without messing up the bead. And if you try to go over the bead again to fix it(big mistake!), you'll make it much worse- so for minor imperfections, it's better to just leave it.