BW1 – Ultimate Tanking Solution – from CT1

CT1 BW1 tanking solution is a one-part, ready-to-use waterproofing system built on CT1’s TRIBRID® Technology. It is designed for professional installation in bathrooms, wet rooms, shower enclosures and similar high-moisture environments where a reliable, long-lasting waterproof membrane is essential. The advanced polymer formulation bonds directly to most construction substrates without priming, which saves a significant amount of time on site.

Most tanking systems ask you to tape joints, cut corner pieces, apply primer, wait for it to dry, then apply the membrane. BW1 cuts through that process. There are no joint tapes required and no fiddly corner pieces to fit. You apply BW1 directly from the tub, work it across the surface, and the material bonds and flexes with the substrate beneath it. For anyone who has spent time wrestling with traditional tanking kit in a tight shower enclosure, that is a meaningful improvement.

Where CT1 BW1 Tanking Solution Gets Used

BW1 is formulated for both domestic and commercial projects. It performs equally well in a single domestic shower refurbishment or a large-scale wet room installation across multiple units. Because it is compatible with such a wide range of substrates, specifiers and installers do not need to check substrate-by-substrate whether a different product is required. It works across concrete, brick, timber, plasterboard, fibre cement board and foam backer board, which covers the vast majority of build-ups used in modern wet area construction.

The material is VOC and solvent free, which matters in confined spaces where ventilation is limited. Bathrooms and wet rooms rarely have ideal airflow during installation, so a product that does not off-gas solvents makes the working environment more comfortable and reduces the need for forced ventilation on smaller jobs.

Performance and Coverage

BW1 offers a coverage rate of up to 2 square metres per litre, which makes the 5kg tub a practical size for most domestic bathrooms and medium-sized wet rooms. The one-part formulation means there is no measuring, no mixing and no waste from incorrectly proportioned batches. You open the tub and start work. The built-in anti-bacterial properties are a useful addition in an environment where mould and microbial growth are a constant concern, particularly behind tiling where moisture can sit unseen for long periods.

BW1 tanking solution is compatible with most tile adhesives and grouts applied over the cured membrane, making it a straightforward inclusion in a standard tiling specification. The flexibility of the cured material means it can accommodate minor structural movement without cracking, which is especially useful in timber-framed constructions where some degree of flex is normal.

The 5kg tub is well suited to trade use. It stores cleanly, reseals between coats, and the ready-to-use format means there is nothing to prepare before you start. On a busy fit-out where time is money, that counts.