Sentinel Waterproofing is now selling waterproofing products, waterproofing materials, building materials, waterproofing supplies, building supplies, waterproofing products, building materials, builders tools, building products, such as backing rods, joint seals, mastics, silastics, sikaflex along with waterproofing membranes, tanking products, bitumen products, roofing materials for that leaky roof leak leak stop products.