Modified Urethane
Modified urethanes are a two-component, durable marking material with similar performance characteristics to those of polyurea and epoxy. Material costs are reported to be slightly more expensive than epoxy but less than polyurea. This product is marketed as being slightly more durable than epoxy but with much quicker cure times (2 minutes) and better ultraviolet color stability. This material can be sprayed from any standard epoxy truck.
Because so little experience exists with modified urethane pavement marking materials, they should be used only on an experimental basis within Texas, although this material seems to have promise on concrete roadways. More data are needed before conclusive recommendations can be made. Table 2-15 summarizes the recommended uses of modified urethane pavement markings.
- | Asphalt | Concrete | Surface Treatments | ||||||
|---|---|---|---|---|---|---|---|---|---|
- | AADT <1,000 | AADT 1,000 –10,000 | AADT >10,000 | AADT <10,000 | AADT 10,000 –50,000 | AADT >50,000 | AADT <1,000 | AADT 1,000 –10,000 | AADT >10,000 |
Use 2 | L | L | L | L | L | L | L | L | L |
Thickness | Manuf. Recommendations | Manuf. Recommendations | Manuf. Recommendations | ||||||
Surface prep. | Remove Existing Markings, Clean & Dry | Remove Existing Markings, Clean & Dry | Remove Existing Markings, Clean & Dry | ||||||
Expected service life | Up to 4 years | Up to 4 years | Up to 3 years | Up to 4 years | Up to 4 years | Up to 3 years | Up to 4 years | Up to 4 years | Up to 3 years |
Approx. bid price (per lf) | $0.63 | $0.63 | $0.63 | ||||||
Estimated cost per year of service life (per lf) | $0.16 | $0.16 | $0.21 | $0.13 | $0.16 | $0.21 | $0.16 | $0.16 | $0.21 |
Footnotes: 1. Based on use in other states. 2. L = limited use. | |||||||||