巴巴多斯采购需求：一种用途广泛且可靠的密封解决方案，采用合成丁基橡胶材料，双面黑色丁基胶带，黑色丁基胶带，建筑行业防水系列。

We're in need of black self-adhesive butyl tape suitable for applying to the tops of wood joists and rafters, specifically designed to offer water protection. It's important that the tape does not have a foil coating on the top side. Could you please provide details on availability, pricing, and lead times? We're looking for a significant quantity, so any bulk order options or discounts would be appreciated. Thanks!