Add to cart Brick and Stone Sealer Concentrate – One Gallon $356.00 Clay Brick Sealer, Stone Sealer and Concrete Sealer with Salt Defense Technology is a 5 year one component, VOC compliant, penetrating water repellent, which contains a proprietary modified siloxane. This water-based siloxane penetrates most masonry and concrete pores and capillaries up to ¼ inch or more depending on surface porosity and moisture content at the time of application.