Sealant Walraven Brandakryl for sealing static and linear cracks in walls and floors with up to 10% movement

Walraven Brandakryl is a water-based acrylic sealant formulated for filling and sealing static and linear cracks and joints in walls and floors with movement up to 10%. Designed for both interior and exterior use, this sealant adheres to common building substrates and provides a flexible, paintable finish that helps prevent water, dust and air ingress in structural gaps. The formulation is intended for construction and repair tasks where a durable, non-structural seal is required at masonry cracks, joints between materials, and interfaces around penetrations.

Advantages

Walraven Brandakryl combines flexibility with good adhesion on typical building materials and cures to a resilient, paintable surface. Its water-based composition simplifies application and cleanup, reduces odour compared with solvent-based products, and makes it suitable for many indoor projects. The product’s allowance for up to 10% movement accommodates minor thermal or settlement shifts without losing seal integrity.

Suitable for

• Repairing static cracks in interior and exterior walls
• Sealing joints between floor finishes and skirting or masonry
• Filling linear gaps around pipe penetrations and conduits
• Preventing water and dust ingress in non-structural gaps

Key specifications

• Movement capability: up to 10% elongation/closure
• Base: water-dispersed acrylic
• Finish: paintable when cured
• Application: suitable for interior and exterior surfaces
• Adhesion: formulated for common masonry, plaster, concrete and painted substrates
• Cleanup: water-soluble before curing

How to use

Ensure surfaces are clean, dry and free of loose material, dust and grease. For best results, widen very narrow cracks slightly to allow adequate sealant contact with adjacent surfaces. Cut the cartridge nozzle to the required bead size and apply the sealant evenly into the crack or joint, maintaining consistent pressure. Tool the surface within the product’s skin time to achieve a smooth finish and remove excess material. Allow the sealant to cure according to ambient temperature and humidity before painting or exposing to moisture.

Usage recommendations

Use Walraven Brandakryl for non-structural sealing tasks where movement does not exceed 10%. Avoid use on continuously submerged surfaces or joints subject to heavy structural movement. Prior-test paint compatibility on a small area if overpainting is required. Store in a cool, frost-free place and protect from direct sunlight.