The curative level is often expressed as % Theory.
100% theory for example means the curative level used is the exact amount required to react with the prepolymer.
The table shows how Physical Properties vary with % Theory.
| Physical Property | Change |
|---|---|
| Hardness | Remains unchanged between 85-100% theory . |
| Tensile Strength | Maximum physical properties achieved between 90-95% theory. |
| Tear Strength | Maximum properties at 100-105% theory. Significantly lower outside the range. |
| Abrasion Resistance | Remains relatively unchanged between 85-105% theory. Slightly better at 100-105% theory. |
| Flex Life | Maximum property at 100-105% theory. |
| Elongation | Maximum at 100-105% theory. |
| Compression set & heat resistance | Best at 85-95% theory. |