Bituthene Primer B1 5L is a high-quality, professional-grade primer designed for the preparation of surfaces before the application of Bituthene self-adhesive waterproofing systems. Its manufactured to enhance adhesion and provide a solid, long-lasting bond. This primer is suitable for use on a variety of substrates, including concrete, masonry, wood and metal. It’s easy to apply with a brush or roller and dries quickly to enable fast project progression.