Belzona 5122 is an excellent building protection product for a wide range of external masonry applications. It is a solvent-free, clear breathable masonry sealer developed to reduce water penetration while allowing the treated surface to breathe.
Once cured, Belzona 5122 dries transparent, helping preserve the natural appearance of concrete, brick, stone and other porous mineral surfaces. At the same time, it helps reduce spalling, cracking, dirt retention and weather-related deterioration, making it a very strong choice for long-term masonry protection.
Supplied as a concentrate, it can be diluted easily on site with clean water and applied by brush or spray. That makes it practical for both targeted repair work and wider facade treatment where you want durable protection without an obvious surface coating.
Belzona 5122 is especially useful where you want invisible masonry waterproofing, breathable facade protection and a product that supports the long-term condition of the building fabric.
Why buy Belzona 5122 from The Reclaimed Company®?
If you are looking for a clear breathable masonry sealer in the UK, The Reclaimed Company® is a strong place to buy it. Belzona 5122 is a high-value building protection product that suits heritage work, facade maintenance, chimney protection, concrete weatherproofing and general masonry preservation.
Clear finish
Retains the natural appearance of the masonry once cured.
Breathable protection
Helps water vapour escape while reducing external water uptake.
Easy to apply
Can be applied by brush or spray after dilution on site.
Long-term value
Helps reduce weathering, freeze–thaw damage and maintenance needs.
Key benefits of Belzona 5122
- Long-term waterproofing of masonry surfaces
- Microporous structure allowing the substrate to breathe
- Retains the natural appearance of the structure, as it becomes transparent when cured
- Supports improved building insulation properties by helping keep the fabric drier
- Reduced dirt retention as well as reduced growth of mildew, moss and lichen
- Helps prevent spalling and cracking associated with freeze–thaw cycles
- Application and cure at ambient temperature with no hot works involved
- Reduced health and safety risks because it is solvent-free
- Can be diluted on site prior to application by brush or spray
- Excellent adhesion to a wide range of porous mineral surfaces including concrete, limestone, brick and sandstone
Typical applications for Belzona 5122
- Waterproof treatment for protection of brickwork, stone and concrete structures
- Long-term protection of statues, monuments and exposed masonry from water ingress
- Reconstructed stone protection on decorative and practical building elements
- Facade weatherproofing where you want an invisible finish
- Chimneys, parapets and exposed walls where rain penetration is contributing to deterioration
For manufacturer background information, you can also learn more about Belzona 5122.
Belzona 5122 summary
- Waterproofing – Protects porous surfaces from water ingress
- Concrete & masonry protection – Helps reduce deterioration caused by weathering
- Breathable sealant – Allows trapped moisture to escape while blocking external water
- Anti-carbonation barrier – Helps reduce carbon dioxide penetration into concrete surfaces
- UV & weather resistance – Offers long-lasting protection against environmental exposure
- Easy application – Can be applied by brush, roller or spray depending on method and site conditions
- Enhances durability – Helps prolong the life of the structure while reducing future maintenance
Who is Belzona?
Belzona is a globally recognised manufacturer of high-performance polymeric repair composites and industrial protective coatings. Founded in 1952 and headquartered in Harrogate, United Kingdom, the company has more than 70 years of experience supplying engineered solutions across industries including oil and gas, power generation, marine, manufacturing, water treatment and infrastructure.
Belzona’s expertise lies in the development of advanced repair and protection materials that help restore and protect equipment and structures from corrosion, erosion, chemical attack and mechanical wear, often avoiding more disruptive replacement work.
Its products are especially valued for their cold-curing application, allowing repairs and protection works to be carried out in situ and without hot work, which is a major practical advantage in many live or sensitive environments.
With distributors and technical consultants in more than 120 countries, Belzona combines local support with global expertise, making it one of the most trusted names in protective repair materials.
Belzona key product areas
- Metal and concrete repair
- Corrosion protection
- Erosion-resistant coatings
- Pipe and tank linings
- Leak sealing and structural bonding
Belzona’s reputation is built on innovation, quality and reliability, which is why its products continue to be specified for demanding repair and protection work worldwide.
Always follow the official instructions for use and safety guidance before application.
