When selecting an interlayer for laminated glass, SGP (SentryGlas® Plus) film and PVB (Polyvinyl Butyral) film are two widely used options. Both enhance glass strength, safety, and durability, but they have distinct properties that make them suitable for different applications.
1. Strength & Structural Performance
- SGP Film: Offers higher rigidity and tensile strength than PVB, making it ideal for structural glass applications such as glass facades, railings, and point-supported glazing.
- PVB Film: While strong, PVB is more flexible and is commonly used in automotive glass, architectural glazing, and safety glass applications.
2. Outdoor Durability & Weather Resistance
- SGP Film: Provides superior edge stability and low moisture absorption, making it ideal for open-edge and extreme weather conditions like hurricane-resistant glazing and marine glass.
- PVB Film: Suitable for outdoor laminated glass when properly sealed, widely used in curtain walls, facades, and balconies. Standard PVB absorbs more moisture than SGP, but high-performance PVB formulations (such as UV-resistant PVB) are available for demanding outdoor environments.
3. Transparency & Aesthetic Performance
- SGP Film: Offers higher optical clarity and less yellowing over time, making it preferable for ultra-clear glass applications.
- PVB Film: Provides good clarity but may have slightly higher haze in thick laminates compared to SGP.
4. Security & Impact Resistance
- SGP Film: Has higher tear resistance and remains intact even after breakage, making it ideal for anti-burglary, explosion-proof, and hurricane-resistant glass.
- PVB Film: Absorbs impact well and is widely used for safety glass, but it may not hold shattered glass as effectively as SGP in high-stress situations.
5. Cost Considerations
- SGP Film: More expensive due to its superior performance, best suited for high-end projects that require structural strength and durability.
- PVB Film: More cost-effective, making it a popular choice for general laminated glass applications.
Which One Should You Choose?
- Choose SGP Film for structural glass, high-security glazing, extreme weather resistance, and open-edge designs.
- Choose PVB Film for standard safety glass, automotive glass, cost-effective architectural projects, and general laminated glass applications.
At Fuyin Group, we supply Yaojing SGP Film and Yaojing PVB Film to meet your glass lamination needs.