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| Joint sealants | |||
| Capital cost £/m | Net present value for 60 years £/m | Sealant life expectancy Years | |
| Silicone sealant | |||
| 1 part low modulus silicone sealant to ISO 11600, Type F with life expectancy of 25 years | 3.40 | 6.70 | 25 |
| 1 part low modulus silicone sealant to ISO 11600, Type F with life expectancy of 20 years | 3.20 | 7.80 | 20 |
| 1 part low modulus silicone sealant to ISO 11600, Type F with life expectancy of 15 years | 3.00 | 9.50 | 15 |
| Polyurethane sealant | |||
| 1 part polyurethane sealant to ISO 11600, Type F | 3.25 | 7.90 | 20 |
| MS polymer sealant | |||
| 1 part MS polymer sealant to ISO 11600, Type F | 3.35 | 6.60 | 25 |
| Polysulphide sealant | |||
| 1 part polysulphide sealant to ISO 11600, Type F | 3.30 | 8.00 | 20 |
| 2 part polysulphide sealant to ISO 11600, Type F | 3.35 | 8.10 | 20 |