Box of 20. Bostik Roof & Gutter is a premium one component, mid-flex, neutral curing 100% silicone roof sealant, which provides excellent adhesion to many common substrates in plumbing and roofing applications. Available colours: Translucent, Grey or White. Message with your selection. More information and product datasheets can be found at: https://www.bostik.com/australia/en_AU/catalog/product/construction/apac/australia/product-roof-amp-gutter/