Henkel Polybit Bitustick XL Cross Laminated Membrane, 1.6mm, Self-Adhesive Waterproofing Membrane

Bitustick XL is suitable for external waterproofing applications such as roofs, balconies, terraces, decks, and foundations. It offers durability in exposure to sunlight and varying weather conditions while providing a reliable seal against moisture.

Key features include a two-layer cross-laminated bitumen composition for enhanced strength, easy application, UV resistance, good temperature and weather tolerance, high flexibility to bridge substrate shrinkage cracks, chemical resistance to oils and fuels, repairability, and compatibility with a range of adhesives and sealants.

Bitustick XL offers cross-laminated construction for superior crack bridging and dimensional stability, often delivering longer-term performance in exposed areas. Self-adhesive bitumen membranes can be easier to install in simple applications but may have less flexibility in bridging cracks. For alternatives on Fepy, you can explore the Self-Adhesive Bitumen Membrane page at https://fepy.com/product/self-adhesive-bitumen-membrane to compare installation methods and performance characteristics.

Torch-on bitumen membranes require heating during installation and can offer strong performance but carry higher on-site fire and handling considerations. Bitustick XL provides a cross-laminated, two-layer solution that may be easier to install in some projects and offers crack bridging without relying solely on heat. See the Torch-On Bitumen Membrane page at https://fepy.com/product/torch-on-bitumen-membrane for a direct comparison.

Common use cases include waterproofing flat and pitched roofs, balconies and terraces, exterior decks, and foundation surfaces where a durable waterproof barrier is required and where substrate movement or cracking may occur.

Prepare the substrate (clean, dry, and level). If required, prime the surface with an appropriate primer. Unroll the membrane and align it carefully, overlapping joints by a recommended width. Seal seams using heat-welding or an approved adhesive/sealant. Use detailing tapes or patches around penetrations and edges. After installation, check for any exposed areas that require touch-up or protective layering if the installation will be exposed to extended sunlight.

Ensure the substrate is clean, dry, and structurally sound. Remove loose materials, dust, oils, and moisture. For some substrates, apply a compatible primer to improve adhesion and surface uniformity. Allow primer to dry as per manufacturer guidance before laying the membrane.

Overlaps should be extended by a recommended width to ensure a continuous seal. Seams can be sealed using heat-welding where equipment is available, or with an approved adhesive/sealant designed for bitumen membranes. Inspect seams after sealing to confirm a uniform bond and watertight finish.

Measure the total area to be waterproofed (length × width) and divide by the area covered per roll. Include extra for overlaps, detailing, and waste (typically 5–10%). Factor in any penetrations, transitions, and edge work to avoid shortages during installation.

Wear appropriate PPE such as gloves and eye protection. Ensure good ventilation if using primers or solvents. If heat-welding, follow fire safety guidelines and keep a fire extinguisher nearby. Store rolls away from direct sunlight and sources of heat when not in use, and follow all local safety regulations related to handling bitumen products.

For minor damage, cut out the affected area and apply a compatible patch or tape designed for bitumen membranes. Re-seal seams and patches with the same method used during installation (heat-welding or adhesive) to restore watertight performance. Regular inspections after heavy weather can help identify repairs before they worsen.