Sealant Pens are designed to restore the look of stained silicone sealant in bathrooms and kitchens. The Sealant Pens whitens and prevents mould re-growth with an advanced anti-fungal forumula – No more scrubbing! It’s an easy and inexpensive way to refresh the look of dirty sealant without the need to completely remove and re-seal your bath, shower or sink.