Can Lift Off Spray Foam & Silicone Caulk Remover be used on vinyl gutter connections?

Lift Off Spray Foam and Silicone Caulk Remover is safe to use on vinyl. However, if there are dyes/coloring in the vinyl, it could change the color. To prevent that from happening, you can mask off the vinyl so that formulation doesn't impact it. We also recommend you brush on Lift Off rather than spraying it on the surface. This way you also get an even distribution of the formulation onto the silicone adhesive.