The stop ends are crucial to finishing all uncapped ends, so you can achieve a flush finish by sealing the stop ends with the brand's own silicone sealant. So if you're looking for an effective and watertight drainage system, these will be a vital addition to your guttering. Zinc Gutta stop ends have been purposely designed to create a seamless and practical finish to your standard half round guttering. As an essential component, it is recommended that these should be positioned slightly past the end of your roof to ensure the guttering is performing to its maximum capabilities during challenging weather conditions.