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Use Nitoseal SC600 for: Sealing joints in chemically aggressive environments like bunds, swimming pools, sewage tanks, and food processing plants.
When standard sealants fail, Nitoseal SC600 is engineered to perform. This one-part, high-performance silicone sealant is specifically designed for sealing joints in the most aggressive chemical environments. Utilising unique polymer technology, it provides outstanding resistance to strong acids, alkalis, pool chlorine, and biological attack. Nitoseal SC600 cures rapidly by reacting with atmospheric moisture to form a tough, flexible, and durable seal, ensuring reduced downtime and long-lasting protection in critical areas like chemical bunds, sewage plants, and food processing facilities.
Product Details:
Cure Time: Nitoseal SC600 offers a fast rate of cure, reaching approximately 3mm in the first 24 hours, followed by 1mm per day (at 25°C/65%RH). This allows for a quicker return to service, minimising disruption on active sites. It is important to allow the sealant to fully cure before subjecting it to chemical exposure.
Application Temperature Range: The sealant can be applied in temperatures from a minimum of 5°C. Once cured, it performs reliably across an exceptional service temperature range of -50°C to +150°C.
Chemical Resistance: This sealant offers robust resistance to a wide array of aggressive chemicals. It is resistant to continuous immersion for over a month in substances like 10% Hydrochloric Acid, 75% Acetic Acid, and 100% Ethanol. It is also highly resistant to Sodium Hydroxide up to 50% concentration, swimming pool chlorine, and salt water chlorination. Note: It is not designed for resistance to organic solvents like xylene or petrol.
Potable Water Certification: Nitoseal SC600 has been rigorously tested to comply with AS4020:2018 for use in contact with drinking water. This certification makes it a trusted solution for sealing joints in potable water assets.
Submerged Application Requirements: For joints subject to hydrostatic pressure, such as in swimming pools or tanks, the sealant must have a minimum depth of 20mm and be supported by a suitable rigid joint filler like Fosroc Hydrocell. A waterstop, like Fosroc Supercast PVC, must also be included in the joint design.
Key Features of Nitoseal SC600 & What They Mean For You
- One-Component, Ready to Use: No complex on-site mixing is required, saving time, reducing potential errors, and ensuring product consistency right from the sausage.
- Exceptional Chemical Resistance: Formulated to withstand a wide range of aggressive chemicals, including strong acids and alkalis, making it ideal for bunds and industrial processing plants.
- UV and Weathering Resistant: Provides a long service life and maintains its integrity even when exposed to harsh Australian weather conditions.
- High Movement Capability: Accommodates joint movement of up to ±25%, ensuring the seal remains intact during thermal expansion and contraction cycles.
- Resistant to Biological Attack: Its robust formulation makes it highly resistant to degradation in environments like sewage processing tanks.
Why Choose Nitoseal SC600:
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Problem: "Food acids in our processing facility are causing standard sealants to erode and fail."
Solution with Nitoseal SC600: As demonstrated at the Dandenong Market, Nitoseal SC600 is highly resistant to acids formed by food waste. It provides a durable, long-term sealing solution that prevents erosion and protects the underlying concrete slab. -
Problem: "We need a sealant for a chemical bund that can reliably contain spills of acids and alkalis."
Solution with Nitoseal SC600: It is specifically designed for chemical bund areas and offers proven resistance to continuous immersion in a wide range of chemicals, including Sulphuric Acid up to 75% and Sodium Hydroxide up to 50%. -
Problem: "The sealant in our swimming pool joints is degrading from chlorine and ozone treatment."
Solution with Nitoseal SC600: It is highly resistant to pool chlorine, saltwater chlorination, and ozone treatments, ensuring a durable, watertight seal that won't break down from pool chemicals. Note: It may be affected by stabilised chlorine containing "trichloroisocyanuric acid".
When to Choose Nitoseal SC600 Over Other Options:
- Choose Nitoseal SC600 over "standard polyurethane sealants" when: You require superior resistance to aggressive chemicals, strong acids, or alkalis. Nitoseal SC600's unique polymer technology is specifically designed for these harsh environments where polyurethanes would degrade.
- Choose Nitoseal SC600 over "standard silicone sealants" when: The application involves prolonged submersion in chemically treated water (like pools) or contact with drinking water. Nitoseal SC600's AS4020:2018 certification and proven hydrolytic stability make it the superior choice.
- Nitoseal SC600 is particularly effective for: Sealing floor joints in chemical and food processing plants, bund walls, sewage tanks, and swimming pools where durability and chemical resistance are paramount.
- Consider other Fosroc solutions when: You require resistance to organic solvents like petrol or xylene. In this case, contact Fosroc for specific advice.
Trade-Specific Applications & Pro Tips for Nitoseal SC600:
For Waterproofers & Civil Contractors (Chemical Bunds):
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Application Focus: Sealing Floor Joints in Concrete Bunds
- Micro-Guide: 1. Ensure the concrete is cured (min 28 days) and joint faces are ground clean and dry. 2. Mix and apply an even coat of Fosroc Primer 13 to the joint faces. 3. Allow primer to become touch-dry (approx. 1 hour @ 23°C). 4. Gun Nitoseal SC600 firmly into the joint and tool immediately.
- Material Compatibility Notes: Priming with Fosroc Primer 13 is essential on masonry substrates to ensure adhesion under prolonged chemical contact.
- Performance Benefits: Creates a robust, flexible seal with tenacious adhesion, capable of containing aggressive chemical spills and preventing environmental contamination.
- Pro Tip: The pot life of mixed Primer 13 is only 30 minutes at 23°C, so mix only what you can use immediately and discard any leftover mixed primer after this time.
- Common Pitfall to Avoid: Applying sealant to wet or tacky primer. This will compromise the bond. Ensure the primer is touch-dry before proceeding.
For Pool Builders & Plumbers:
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Application Focus: Sealing Movement Joints in Swimming Pools
- Micro-Guide: 1. Design joints with a minimum sealant depth of 20mm and include a backing rod and waterstop. 2. Prepare joint faces as per the guide for bunds, using Fosroc Primer 13. 3. Apply Nitoseal SC600, ensuring complete filling of the joint. 4. Tool off to a smooth finish without using soapy water, as this can affect the cure.
- Performance Benefits: Provides a long-lasting, watertight seal that is highly resistant to pool chlorine and ozone treatments, and is certified safe for contact with drinking water.
- Pro Tip: Ensure regular pool cleaning is performed to prevent the build-up of crystallized deposits that can form on the sealant surface from certain types of stabilised chlorine.
- Common Pitfall to Avoid: Using masking tape or 'Gafa' tape as a bond breaker. Nitoseal SC600 may bond to these tapes, causing joint failure. Use only polyethylene bond breaker tape.
How to use Nitoseal SC600
- Essential Tools & Setup: You'll need a suitable sausage gun, tooling spatulas, and Fosroc Solvent 10 for cleanup. For priming, a spatula or paint stirrer and a brush are required.
- Surface Preparation – The Key to Success: Joint faces must be sound, clean, dry, and free from all contaminants. Use grinding or a solvent wipe with Fosroc Solvent 10 to remove oil, grease, and curing compounds. Priming with Fosroc Primer 13 is mandatory for masonry substrates.
- Trade-Specific Pro Tips for Optimal Results: For a professional finish, tool the sealant immediately after application. This presses the sealant against the joint faces, ensuring good surface wetting and optimum adhesion.
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Troubleshooting Common On-Site Issues:
- Issue: Poor adhesion to concrete. Solution: Ensure the surface was completely clean, dry, and properly primed with Fosroc Primer 13 as per the TDS. The sealant must be applied within 8 hours of the primer becoming touch-dry.
- Issue: Sealant has failed in the joint. Solution: Check that the joint movement has not exceeded the sealant's ±25% capability and that the correct width-to-depth ratio was used. Also confirm that an appropriate bond breaker tape was used, not masking tape.
Storage, Shelf Life, and Handling
- Optimal Storage Conditions: Store in dry conditions between +10°C and +25°C, away from direct sunlight and moisture.
- Shelf Life and Batch Information: Nitoseal SC600 has an impressive 3-year shelf life when stored correctly in its original, unopened packaging.
- Handling & Disposal: This product causes serious eye irritation. Wear protective gloves and eye/face protection. If in eyes, rinse cautiously with water for several minutes. For full details, refer to the Safety Data Sheet (SDS).
Certifications and Compliance
- AS4020:2018 Certified: Tested and approved for use in contact with drinking water, making it suitable for sealing joints in potable water structures.
- Hazardous Material: Classified as a hazardous material according to Safe Work Australia GHS 7, primarily as a Category 2A Eye Irritant.
Frequently Asked Questions About Nitoseal SC600
Q: Is Nitoseal SC600 paintable?
A: The provided technical data does not specify whether Nitoseal SC600 is paintable. As a silicone-based sealant, it is generally not paintable. It's always recommended to conduct an adhesion test with your chosen paint system on a small area first.
Q: Do I always need to use a primer with Nitoseal SC600?
A: Priming is not normally required on clean glass, ceramic, and metal surfaces. However, for all concrete and masonry substrates, you must use Fosroc Primer 13 to ensure a durable bond, especially in submerged or chemical exposure conditions.
Q: What is the correct joint design for this sealant?
A: For joints between 10mm and 20mm wide, the minimum depth is 10mm. For joints wider than 20mm, a 2:1 width-to-depth ratio should be maintained. For any joints under hydrostatic pressure (like in a pool), the minimum sealant depth must be 20mm.
Q: Can I use this to seal joints in an asphalt or bitumen driveway?
A: No. Elastomeric sealants like Nitoseal SC600 should not be applied in direct contact with bituminous materials like asphalt. This can lead to discolouration and adhesion failure.
Q: How do I clean up excess Nitoseal SC600?
A: Uncured sealant and tools should be cleaned promptly using Fosroc Solvent 10. Cured sealant is very difficult to remove and can only be removed by mechanical methods like grinding or cutting.
Applications Where Nitoseal SC600 Excels:
- Chemical Bund Areas: The primary use, offering robust protection in concrete joints exposed to a wide range of chemical spills and continuous immersion.
- Food, Wine, and Citrus Processing Areas: Ideal for floor joints where resistance to food-based acids (like citric, lactic, and acetic) and stringent cleaning regimes is necessary.
- Swimming Pools and Potable Water Tanks: Highly resistant to pool chemicals and certified to AS4020:2018 for contact with drinking water, making it perfect for sealing submerged joints.
- Sewage Processing Plants: Its high resistance to biological attack ensures durability and longevity in the aggressive environment of sewage tanks.
Top Benefits of Using Nitoseal SC600 on Your Projects:
- Unmatched Chemical Resistance: Gives you the confidence to seal joints in the most aggressive environments, protecting assets and preventing costly failures where other sealants would dissolve or degrade.
- Certified for Potable Water: AS4020:2018 compliance allows you to confidently specify and use this sealant in critical infrastructure for drinking water, ensuring safety and meeting regulatory requirements.
- Faster Return to Service: The fast cure rate means that facilities like chemical plants or public pools can be returned to operation sooner, minimising downtime and saving the asset owner money.
- Long-Term Durability: With excellent UV resistance and a 3-year shelf life, this sealant provides a reliable, long-lasting solution that resists weathering and biological attack, reducing the need for callbacks and future maintenance.
Step-by-Step Application Guide for Nitoseal SC600:
- Joint Preparation: Ensure the joint is designed correctly (width, depth, movement capability). Grind or solvent-clean the joint faces to remove all contaminants. The substrate must be sound, clean, and completely dry. Insert a closed-cell backing rod or apply bond-breaker tape to the required depth.
- Priming (Mandatory on Masonry): Mix the two components of Fosroc Primer 13 thoroughly. Apply an even coat with a brush to the joint faces only. Avoid pooling primer at the base of the joint.
- Allow Primer to Dry: Let the primer become touch-dry before applying sealant (typically 1 hour at 23°C). Do not apply sealant to wet or tacky primer. The sealant must be applied within 8 hours of the primer drying.
- Application: Cut the nozzle of the 600ml sausage and place it in a suitable bulk gun. Gun the sealant firmly into the joint, ensuring the nozzle is guided along the joint to achieve full contact with the primed surfaces and avoid air voids.
- Tooling for a Professional Finish: Immediately after gunning, tool the sealant with a smooth, suitably shaped tool. This ensures good contact with the joint faces and provides a neat, professional finish. Do not use soapy water as a tooling aid.
- Clean-Up: Immediately clean tools and any excess uncured sealant using Fosroc Solvent 10. Cured sealant can only be removed mechanically.
Important Limitations & Safety When Using Nitoseal SC600:
Product Limitations:
- Organic Solvents: Not designed to provide resistance to organic solvents like petrol, xylene, or heptane. Contact Fosroc for advice if this resistance is required.
- Bituminous Materials: Do not apply in direct contact with asphalt or other bituminous materials.
- Specific Chlorine Types: Stabilised chlorine containing "trichloroisocyanuric acid" may cause the surface of the sealant to break down.
- Full Cure Required: The sealant must be allowed to fully cure before it is subjected to any chemical exposure.
Safety First – Protecting Yourself and Your Workspace:
- Personal Protective Equipment (PPE): This product causes serious eye irritation. Always wear chemical goggles and gloves when handling. Nitrile rubber gloves are suggested for intermittent contact.
- Handling: Avoid eye contact and prolonged skin contact. Wash hands, face, and all exposed skin thoroughly after handling.
- Ventilation: Use in a well-ventilated area. Natural ventilation should be adequate under normal conditions.
- First Aid Essentials: If in eyes, hold eyelids apart and rinse continuously with water for at least 15 minutes. If eye irritation persists, get medical advice/attention. For full information, refer to the Safety Data Sheet (SDS).
Nitoseal SC600 Adhesion Profile – Compatible Substrates:
- Concrete & Masonry: Excellent adhesion when prepared correctly. Joint faces must be sound, clean, dry, and always primed with Fosroc Primer 13 to ensure long-term performance, especially in submerged conditions. New concrete must cure for a minimum of 28 days.
- Glass (uncoated): Excellent adhesion. Priming is not normally required, but the surface must be thoroughly cleaned with Fosroc Solvent 10 to remove any contaminants.
- Ceramic Surfaces: Excellent adhesion, primer not typically required. Ensure surfaces are clean and free of dust or grease.
- Metals: Good adhesion to most metals without a primer. If the metal surface has a paint or organic coating, it is highly recommended to conduct an adhesion test to confirm compatibility.
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