Is Liquid Rubber MetalSafe Sealant safe for drinking water? Currently we do not have a certification allowing this use. Related articles How do I cover gaps and cracks? What temperature can I apply Liquid Rubber MetalSafe Sealant? Can I go over light rust with MetalSafe Sealant? What should I use to clean up? What if I see blisters? Comments 0 comments Please sign in to leave a comment.