南非采购需求：硅酮密封胶、粘合剂密封胶、聚氨酯密封胶、周边密封胶、防风雨中性硅酮密封胶、聚氨酯密封胶

I'm looking to purchase concrete roofing materials, specifically for a project that requires approximately 100 square meters. It's important that the products meet industry standards for durability and weather resistance. Please provide details on your available options, including specifications, pricing, and lead times for delivery. If you have any recommendations or alternatives that align with my requirements, I'd love to hear about them as well. Thanks!