Thanks to its excellent weather resistance, wide temperature range adaptability, and superior sealing performance, phenyl silicone rubber has become a key material in the field of building waterproofing and sealing, especially suitable for the waterproofing and sealing needs of building structures under extreme climatic conditions.
I. Core Performance Advantages
Wide Temperature Range Sealing Stability
Low-temperature resistance: Phenyl silicone rubber maintains elasticity in low-temperature environments of -100℃ to -120℃. Low-phenyl content products remain flexible at -110℃, ensuring the reliability of sealing in building structures in extremely cold regions.
High-temperature resistance: The long-term working temperature can reach 250-300℃, far exceeding ordinary rubber materials, making it suitable for building waterproofing systems in high-temperature environments.
Excellent Weathering and Aging Resistance
Phenyl silicone rubber has excellent resistance to ozone, ultraviolet radiation, and chemical corrosion. It is not prone to aging and deformation during long-term use in exposed environments such as building facades and roofs.
Low compression set ensures that the sealing material maintains its shape and dimensional stability even under long-term pressure or heat, effectively preventing leakage in building structures.
Adaptability to Special Environments
Radiation resistance: High-phenyl content products (phenyl content ≥30%) have excellent radiation resistance, suitable for special building environments.
Self-extinguishing properties: Medium-to-high phenyl content products have self-extinguishing properties, which means they can extinguish themselves once ignited, improving building fire safety.

II. Application Examples in Building Waterproofing and Sealing
Roof and Basement Waterproofing Systems
Phenyl silicone rubber is widely used in roof waterproofing and basement sealing of buildings. Its weather resistance and aging resistance allow it to be used for a long time in harsh natural environments.
As a core material for waterproof membranes and sealants, it effectively prevents rainwater penetration and groundwater intrusion, protecting the integrity of the building structure.
Building Structure Joint Sealing
Used for sealing expansion joints, settlement joints, and construction joints in buildings, adapting to the thermal expansion and contraction of building structures and preventing cracks.
Glass Curtain Wall Sealing: Phenyl vinyl silicone rubber can be used for sealing and bonding of building structures, such as in the manufacture of glass sealant, ensuring the airtightness and watertightness of the curtain wall system.
Applications in Special Building Environments
Buildings in extremely cold regions: In extremely cold climates, the low-temperature flexibility of phenyl silicone rubber ensures that the sealing material does not harden or crack. High-Temperature Industrial Buildings: Suitable for waterproofing and sealing systems in high-temperature environments such as factories and power plants, capable of withstanding temperatures above 300℃.
Nuclear Power Plant Buildings:  Utilizing its radiation resistance, it is used for the special waterproofing and sealing needs of nuclear power plant buildings.

III. Product Selection and Application Recommendations
Select phenyl content based on the building environment:
Low phenyl content (5-20%): Suitable for ultra-low temperature environments (below -100℃), such as buildings in extremely cold regions.
Medium phenyl content (20-30%): Balances low-temperature resistance and ablation resistance, suitable for general building waterproofing and sealing.
High phenyl content (above 30%): Designed for special environments, such as high-radiation building environments like nuclear power plants.
Construction and Application Precautions:
Phenyl silicone rubber requires vulcanization to achieve optimal performance; room temperature vulcanization (RTV) is commonly used in building applications.
Ensure the substrate is clean, dry, and free of oil before construction to ensure bonding strength.
For large building projects, it is recommended to conduct small-scale tests to confirm the compatibility of the material with the building structure.
Synergistic Applications with Other Materials:
Can be used in conjunction with EPDM rubber (the king of weather resistance) to form a composite waterproofing system, improving overall performance.
Combined with high-temperature resistant materials such as acrylate (ACM/AEM), it can be used for waterproofing and sealing in special building areas.