I bought this aluminum and metal silicone sealant for my kitchen sink. There was a small gap between the sink and the countertop that I wanted to close but to keep it looking unobtrusive. I was happy with the result as the color matched the aluminum well. I applied this a few months ago and have never seen the mold you sometimes see on white or clear caulk so I'm even happier. As with all sealing products, follow directions carefully, including the warning label.