What is a neutral cure silicone sealant? Advantage vs Acetoxy Silicones.
A neutral cure silicone sealant is a high-quality professional sealant. It cures by reacting with moisture in the air and releases non-acidic byproducts like alcohol or oxime. Unlike acetoxy sealants, it is non-corrosive and almost odourless, making it safer for more materials and indoor use.
Key Advantages of Neutral Cure
- Surface Compatibility: Safe for sensitive materials like natural stone, metals (copper, brass, lead), and concrete that acetoxy sealants can damage.
- Electronics-Safe: Ideal for sensitive electronics because it does not release corrosive acids.
- Weather Resistance: Provides superior UV and weather protection, making it better for long-term outdoor use.
- Low Odour: Has a mild smell, perfect for indoor and poorly ventilated spaces.
| Feature | Neutral Cure Silicone | Acetoxy Silicone |
|---|---|---|
| Byproduct | Releases alcohol or oxime (Non-acidic) | Releases acetic acid |
| Odour | Minimal to no odour | Strong vinegar-like smell |
| Curing Speed | Slower (Skin: 10–30 mins) | Faster (Skin: <20 mins) |
| Corrosiveness | Non-corrosive | Corrodes sensitive metals |
| Adhesion | Excellent on most surfaces | Best on non-porous surfaces |
| Best For | Electronics, stone, exterior, masonry | Sanitary, glass, DIY |
Engineering Applications of Silicone Sealants
1. Industrial bonding and sealing
Silicone sealants bond metals and plastics in vehicle bodywork, appliances, and motor housings. Supex 280 and Supex 4005 deliver strong adhesion.
2. Non-corrosive silicone for electronics
Neutral cure silicones protect components without corroding contacts. They guard against moisture and heat. Supex 596 FL and Supex 4005 are extensively used for such applications.
3. High Temperature RTV for Transportation
Marine, aerospace, and rail industries use neutral silicones for sealing and vibration control in harsh conditions.
4. silicone sealant for HVAC ducts
Silicones seal duct joints and metal fittings. Supex Neutral+ maintains flexibility across temperature changes.
5. Facade Sealing
Silicones seal concrete and aluminum panel joints. Supex WP+ absorbs movement while staying watertight.
6. Glazing
Neutral cure silicones bond glass to frames in high-rise buildings. They offer flexibility and weather resistance.
7. Solar Energy Systems
Silicones seal solar panels and junction boxes. They resist UV and ensure long-term durability.
8. Firestop Systems
Special neutral silicones help maintain fire ratings in sealed structural penetrations.
Best Neutral Silicone Sealants from Supex
At Supex, we offer a high-performance range of neutral cure silicone sealing sealants ideal for demanding industrial and architectural needs:
- Supex Neutral+ – Premium-grade, low-odor sealant for exterior and interiors
- Supex 280: Flange sealing, gasket sealant, high temperature applications
- Supex WP+ – Superior weather resistance for facade and glazing
- Supex 596 FL – Fast-curing, high-flexibility for Electronics potting, vonding, sealing
- Supex 4005 – Heavy-duty industrial-grade sealant for extreme conditions
Why Choose Supex Neutral Cure Sealants?
Feature | Benefit |
Non-corrosive | Safe on metals, ideal for electronics |
Low Odor | Comfortable for indoor use |
High Flexibility | Adapts to movement and vibration |
Superior Adhesion | Binds to a range of construction materials |
Weather Resistance | Long-lasting outdoor durability |
Neutral cure silicone sealing are an essential component in modern engineering, offering safe, flexible, and durable sealing solutions. With Supex’s premium range—including Supex Neutral+ Supex 280 , Supex WP+ , Supex 596 FL , and Supex 4005 —you get industry-tested performance across applications like glazing, HVAC, industrial assembly, and more.Oil