Isolocork Filler

Isolocork Filler is a cork-based interior and exterior coating used to repair, seal, and protect building surfaces affected by cracking, weathering, and surface degradation. It is designed to fill fissures, stabilise flaking finishes, and improve surface continuity prior to final protective layers.

The material is breathable and water-repellent, allowing rain shedding while enabling moisture vapour to escape, reducing the risk of trapped damp. When applied as part of a continuous system, it helps reduce thermal bridging and supports more even thermal performance across the building envelope.

Isolocork Filler is coloured-through, meaning colour is integral to the material rather than applied as a surface paint. This improves durability and significantly extends maintenance cycles, removing the need for frequent repainting typically required every 3–5 years with conventional coatings.

The product is spray-applied, enabling fast installation with minimal disruption. Sills, pipework, and fixtures can typically remain in place, reducing labour time and site complexity. It is compatible with common substrates including masonry, cement renders, timber, and metal.

The product is fire-resistant, does not propagate flame, and does not emit toxic smoke, making it suitable for internal and external use within compliant system designs.

📄 Download our brochure below to learn more about the benefits of Isolocork and see application examples..