Are you an engineer, architect, or construction professional searching for the exact melting point of silicone sealant? Unlike plastics, silicone doesn’t melt easily—but at extreme temperatures, it can degrade. In this guide, we explain silicone’s heat resistance, flame-retardant properties, and why Simseal’s fire-rated silicone sealants meet Australian safety standards (AS1530.3 & EN45545).

Does Silicone Sealant Have a Melting Point?

A common question in construction and engineering is: “What is the melting point of silicone sealant?” The answer is surprising—silicone doesn’t technically melt like plastic. Instead, it remains solid until it reaches combustion temperatures.

Key facts:

• Silicone is not flammable but can burn at extreme heat.
• Ignition temperature: 842°F (450°C)—far higher than most construction materials.
• Degradation begins at 200-450°C, causing brittleness over time.

For applications where fire safety is critical, flame-retardant silicone sealants (like those from Simseal) are essential.

How Heat Affects Silicone Rubber & Sealants

While silicone sealant won’t melt, prolonged exposure to high temperatures can weaken it. Here’s what happens:

• 200-450°C: Gradual loss of elasticity, leading to brittleness.
• Above 450°C: Risk of combustion (though it requires sustained extreme heat).
• Flame retardant additives improve stability and slow burning.

Simseal’s Fire-Rated Silicone Sealant Compliance (AS1530.3 & EN45545)

• AS1530.3 (Australian fire resistance standard)
• EN45545 (European rail fire safety standard)
• 4-hour fire rating for maximum protection

This ensures reliability in high-temperature construction applications.

Applications of High-Temperature Silicone Sealants

Simseal’s fire-resistant silicone sealants are ideal for:

• Expansion & construction joints (walls, cladding panels)
• Service penetrations (pipes, electrical conduits)
• Roofing & conservatory sealing
• Industrial fire barriers

Safety Precautions When Using Silicone Sealants

While silicone sealants are safe, proper handling is crucial:

First Aid Measures

• Skin contact: Wash with soap/water—never use solvents.
• Eye contact: Rinse for 10+ minutes with clean water.
• Ingestion: Do NOT induce vomiting—rinse mouth and drink water.
• Inhalation: Move to fresh air immediately.

Always seek medical advice if symptoms persist.

Need a High-Temperature Resistant Silicone Sealant?

Simseal’s fire-rated silicones are trusted by Australian builders for:

• Extreme heat resistance
• Compliance with AS1530.3 & EN45545
• Long-lasting durability in harsh conditions

Browse Simseal’s Fire-Resistant Silicone Sealants Now →

Final Thoughts

Unlike plastics, silicone sealant doesn’t melt—but it can degrade under extreme heat. For fireproofing and high-temperature applications, Simseal’s flame-retardant silicones provide unmatched safety and performance.

Have questions? Contact Simseal’s experts for advice on the best sealant for your project.