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Sovereign Hey’di Antisulphate is a highly effective treatment for damp and salt-affected masonry, designed to stabilise substrates before the application of tanking systems, cement renders, or mineral coatings.
This advanced formula chemically reacts with soluble salts, converting them into insoluble compounds, thereby preventing their migration into newly applied coatings.
Essential for basement tanking, flood-damaged properties, and chimney breast repairs, this deeply penetrating solution ensures long-term protection against salt-related deterioration.
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✔️ Neutralises harmful salts in masonry, preventing efflorescence and surface damage in renders and tanking systems.
✔️ Deeply penetrates porous masonry, stabilising salt-affected surfaces before applying new coatings or tanking slurries.
✔️ Stops hygroscopic salts from absorbing moisture, eliminating persistent damp patches and ensuring a dry finish.
✔️ Essential for basement waterproofing, chimney restoration, and flood remediation to enhance long-term durability.
✔️ Easy-to-apply water-based formula that provides long-lasting protection against salt contamination in masonry.
Sovereign Hey’di Antisulphate is a high-performance liquid treatment specifically designed to neutralise harmful salts in masonry, preventing damage to renders, tanking systems, and decorative finishes. Salt contamination, often caused by rising damp and exposure to ground salts such as sulphates, nitrates, and chlorides, can lead to efflorescence, surface degradation, and coating failure. This advanced solution chemically stabilises salts, preventing their migration and ensuring a durable, contamination-free surface for subsequent treatments.
Formulated as a water-based, clear liquid, Hey’di Antisulphate deeply penetrates porous masonry, reaching embedded salts and reacting to convert them into stable, non-mobile compounds. This process halts the movement of hygroscopic salts, which otherwise absorb moisture from the air and cause persistent damp patches. By neutralising these salts at their source, this treatment eliminates a major cause of recurring damp issues, ensuring that newly applied renders, tanking slurries, and coatings remain intact and effective.
The effectiveness of cementitious tanking systems and waterproof renders can be significantly compromised by salt contamination. Sovereign Hey’di Antisulphate is an essential pre-treatment for basement waterproofing and damp-proofing applications, preventing salt-induced failures that could otherwise lead to costly rework. By stabilising the masonry before applying coatings, it ensures a robust and long-lasting waterproofing system that is resistant to deterioration caused by salt migration.
Long-term exposure to combustion by-products in chimneys can result in aggressive salt damage, leading to surface breakdown and structural instability. Hey’di Antisulphate is highly effective in treating chimneys affected by sulphate and chloride contamination, restoring stability before repointing or rendering. Additionally, it plays a crucial role in flood remediation, as waterborne salts left behind after flooding can accelerate masonry deterioration. Treating flood-affected walls with Hey’di Antisulphate prevents future degradation, preserving the integrity of the structure.
With its deep-penetrating formulation, rapid neutralisation properties, and long-lasting effectiveness, Sovereign Hey’di Antisulphate is a vital treatment for professionals in damp-proofing, restoration, and waterproofing sectors. Whether used in new construction, remedial work, or historical building conservation, it provides an essential safeguard against salt-induced failures, ensuring a stable, contamination-free surface for long-term durability.
Effectively Neutralises Salts: Converts harmful, soluble salts into insoluble compounds, preventing their migration and ensuring long-term substrate stability.
Prevents Damp & Efflorescence: Stops hygroscopic salts from drawing in moisture, preventing persistent damp patches and surface deterioration.
Enhances Tanking System Durability: Essential for basement tanking and waterproofing applications, ensuring optimal adhesion and long-term performance of cementitious coatings.
Deep Penetration for Long-Lasting Protection: Absorbs deeply into porous masonry, stabilising the substrate and minimising future salt damage.
Versatile Application: Suitable for basement walls, chimney breasts, flood-damaged properties, and other salt-contaminated masonry structures.
Easy to Apply: Supplied as a ready-to-use liquid that can be applied by brush or spray, making it convenient for professional use.
Compatible with Cementitious Coatings: Works effectively as a pre-treatment before the application of tanking slurries, cement renders, and breathable coatings.
Basement Tanking & Waterproofing: Prevents salt migration in below-ground structures, ensuring tanking systems remain intact and free from efflorescence.
Chimney Breast Restoration: Neutralises aggressive salts caused by long-term combustion deposits, preventing future staining and damage to decorative finishes.
Flood Remediation: Essential for post-flood restoration, preventing salts carried by floodwaters from compromising newly applied finishes.
Rising Damp Treatment: Used as part of damp-proofing treatments to stabilise masonry after the installation of a chemical damp-proof course (DPC).
Salt-Contaminated Masonry Repairs: Ideal for use prior to cement renders and mineral coatings, ensuring a stable, salt-free surface.
When handling and applying Sovereign Hey’di Antisulphate, standard health and safety precautions must be followed. Avoid contact with skin and eyes, and wear suitable Personal Protective Equipment (PPE), including gloves and safety goggles.
Ensure adequate ventilation in the application area to prevent inhalation of fumes. Do not eat, drink, or smoke while using this product, and keep it away from food, drink, and animal feeding stuffs. If the product comes into contact with skin, wash immediately with soap and water. In case of eye contact, rinse thoroughly with clean water and seek medical attention if irritation persists.
Always consult the product label and Material Safety Data Sheet (MSDS) before use. Keep out of reach of children and store in a cool, dry place within the temperature range of +5°C to +30°C.
Sovereign Hey’di Antisulphate is designed for use on damp and salt-affected masonry. It is particularly effective in basement tanking systems, flood-damaged properties, and areas where efflorescent salts are present, such as chimney breasts.
The product should only be used on porous masonry surfaces, including brick and concrete, and must not be applied to gypsum-based plaster, bituminous coatings, or painted surfaces. It is essential to confirm the suitability of the substrate before application to ensure the best possible results.
The substrate must be clean, absorbent, and free from any contaminants that could interfere with absorption. All existing salt-affected plaster must be completely removed, exposing the underlying masonry.
Any loose material, dust, grease, oils, bitumen, and paint residues must be eliminated. Joints should be raked out to allow deep penetration of the treatment. If efflorescence is visible, it should be brushed off before application.
Ensuring that the substrate is correctly prepared will allow for the most effective treatment and prevent further salt migration into subsequent coatings such as tanking slurries or renders.
Hey’di Antisulphate must be applied in two stages to effectively convert soluble salts into insoluble compounds. The first coat must be diluted at a 1:1 ratio with clean water. This diluted solution should be applied to the entire surface, ensuring complete saturation of the substrate. A brush can be used for application, but for large areas, a low-pressure garden sprayer with coarse droplets is recommended to facilitate uniform coverage.
Once the first coat has been applied, allow it to dry for approximately 6 to 18 hours, depending on ambient conditions. The second application should be applied undiluted, directly onto the surface, ensuring full saturation. The substrate must be treated thoroughly to prevent future salt movement and ensure the longevity of any subsequent coatings.
Tanking or rendering can commence immediately after the second application is complete. There is no need for further waiting time once the substrate is saturated with Hey’di Antisulphate.
Coverage will vary depending on the porosity and absorbency of the substrate. On average, a 5 kg pack of Sovereign Hey’di Antisulphate will cover approximately 17.5m² to 22.5m² for a two-coat application. It is important to ensure sufficient product is applied to achieve deep penetration into the masonry.
All tools and equipment should be cleaned immediately after use with clean water. If left to dry, the product may become difficult to remove. Dispose of any waste material responsibly in accordance with local regulations. Ensure that any excess product is stored securely with the lid tightly closed to prevent contamination or spillage.
Sovereign Hey’di Antisulphate is not a permanent salt barrier; additional measures must be taken to fully protect the masonry. The product should only be used as a preparatory treatment before the application of tanking slurries, cement renders, or other waterproofing systems. It is not suitable for use on exposed brickwork or as a standalone treatment. For optimal results, it should always be incorporated into a complete damp-proofing or basement tanking specification.
Do not apply in temperatures below +5°C or above +30°C, as extreme temperatures may affect absorption and effectiveness. Store the product in a cool, dry environment and use within the recommended shelf life for best performance. Always conduct a patch test in an inconspicuous area to ensure compatibility with the substrate before full-scale application.
A) Sovereign Hey’di Antisulphate is a specialist treatment for damp and salt-affected masonry, designed to neutralise harmful salts before applying tanking systems, renders, or mineral coatings. It is commonly used to treat basements, flood-damaged walls, rising damp areas, and chimney breasts where salts such as sulphates, nitrates, and chlorides have migrated into the masonry. Without proper treatment, these salts can cause efflorescence, surface breakdown, and coating failures. By chemically reacting with these salts and converting them into insoluble compounds, Hey’di Antisulphate prevents their migration, ensuring long-term protection for subsequent coatings.
A) Sovereign Hey’di Antisulphate works by chemically stabilising soluble salts, preventing them from drawing in moisture or damaging coatings. Hygroscopic salts, such as sulphates and chlorides, absorb moisture from the air, leading to persistent damp patches and coating failures. When applied to contaminated masonry, the treatment penetrates deep into the substrate, where it reacts with the salts to form stable, non-mobile compounds. This process halts salt migration and ensures that renders, tanking systems, or paints adhere properly and remain intact over time.
A) Salt contamination is a major cause of failure in tanking and rendering systems. When salts are present in masonry, they continue to absorb moisture, leading to blistering, cracking, and detachment of cementitious coatings. Sovereign Hey’di Antisulphate prevents this by neutralising salts before application, ensuring that waterproofing or decorative finishes are applied onto a stable, salt-free surface. This extends the life of the tanking system and reduces the risk of costly rework.
A) Yes, Hey’di Antisulphate is particularly effective for chimney breast restoration. Over time, combustion gases and soot deposits introduce sulphates and chlorides into masonry, leading to efflorescence, surface breakdown, and staining. Applying Hey’di Antisulphate neutralises these aggressive salts, preventing further deterioration before repointing, plastering, or rendering. This ensures a durable and long-lasting finish.
A) Yes, it is an essential treatment for flood remediation. Floodwaters carry dissolved salts, which become embedded in masonry when the water evaporates. These salts can continue absorbing atmospheric moisture, causing persistent damp problems. Applying Hey’di Antisulphate stabilises these salts, ensuring the wall remains dry and stable before re-plastering or decorating.
A) Yes, it is commonly used after installing a chemical damp-proof course (DPC). When rising damp is treated, salts previously carried by water remain in the masonry, causing efflorescence and plaster damage. Hey’di Antisulphate prevents these salts from migrating into new coatings, ensuring the success of damp-proofing treatments.
A) The surface must be clean, porous, and free from contaminants. Any salt-affected plaster or loose coatings must be completely removed to expose bare masonry. If efflorescence is visible, it should be brushed off. Any grease, oil, bitumen, or previous coatings must be removed to allow full penetration of the treatment. Joints should be raked out to allow deeper penetration into mortar beds.
A) The product is applied in two coats for maximum effectiveness. The first coat is diluted with equal parts water (1:1 ratio) and applied to fully saturate the surface. This ensures deep penetration. After 6 to 18 hours drying time, a second coat is applied undiluted for complete salt neutralisation. Application can be done with a brush or low-pressure sprayer, ensuring full coverage of all affected areas.
A) The first diluted coat should be allowed to dry for 6 to 18 hours, depending on temperature and humidity. The second undiluted coat requires no additional drying time before applying renders, tanking systems, or mineral coatings.
A) The coverage depends on masonry porosity, but a 5 kg pack typically covers 17.5m² to 22.5m² with a two-coat application. Highly porous surfaces may require additional product for deep penetration.
A) Yes, the product is water-based and low in odour, making it suitable for indoor use. However, proper ventilation is recommended during application. Avoid inhalation of vapours, and wear appropriate PPE to prevent skin and eye contact.
A) No, the product should only be used on masonry surfaces, such as brick and concrete. It is not compatible with gypsum-based plasters, bituminous coatings, or previously painted surfaces.
A) Application should only take place when temperatures are above +5°C and below +30°C. Cold temperatures can slow absorption, while excessive heat can cause premature drying, reducing effectiveness.
A) No, it is a pre-treatment to stabilise salts, but additional damp-proofing measures may still be needed. It should always be used as part of a complete waterproofing or restoration system.
A) Wear gloves, goggles, and protective clothing to prevent skin and eye contact. Work in well-ventilated areas and avoid inhaling vapours. Keep away from food, drink, and animal feed. If contact occurs with skin or eyes, wash immediately with water and seek medical advice if irritation persists.
A) The product should be stored in its original container in a cool, dry place, away from direct sunlight or frost. Storage temperatures should be between +5°C and +30°C. Ensure the lid is securely closed to prevent contamination.
A) All tools should be washed immediately with clean water. If left to dry, the product may harden, making removal difficult. Any waste should be disposed of responsibly, following local environmental regulations.
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