Profiles and siding used in building exterior components need to resist discoloration and deterioration due to heat and UV light. Experimental results show that “Durastream” is more resistant to discoloration than competitor products, even when exposed to direct sunlight and heat. CPVC compound “Durastream” is a product that can replace many thermoplastics commonly used in outdoor applications.
| Test Equipment | UV Long Life Fade Meter |
| Room Temperature | 40 °C (104 °F) |
| Panel Temperature | 63 °C (145 °F) |
| Evaluation Time | 500 Hours (Every 100 Hours, Sampling) |
Continued exposure to ultraviolet light generally damages thermoplastics. Materials not only discolor, but also become brittle and prone to breakage.
Impact resistance retention (IZOD) is an excellent way to measure and compare the degree of degradation and structural integrity of different materials. This test simulates continuous exposure to sunlight. Higher retention means less degradation and higher impact strength.
The test results show that compared to competitive products, “Durastream” is able to maintain its impact strength under continuous sunlight.
| Test Equipment | UV Long Life Fade Meter |
| Room Temperature | 40 °C (104 °F) |
| Panel Temperature | 63 °C (145 °F) |
| Evaluation Time | 500 Hours (Every 100 Hours, Sampling) |
