A non-toxic anti-freeze paste safe for the environment Just because the fishing is hot, doesn’t mean that the weather will follow suit. That’s where Stanley’s Ice Off Paste comes into play. A non-toxic anti-freeze paste for lines and guides to help keep them from freezing, even when temperatures are hovering below 0. It is safe for the environment as well as your equipment. Apply to your line and guides and watch it work. Just ask any Midwestern winter steelhead fisherman.