SEAM is a patented additive developed by Shell for use in asphalt paving mixtures. Both a binder extender and an asphalt mix modifier, SEAM improves road strength and reduces pavement cracking and rutting, which results in safer roads and longer road life. SEAM is also ideal for paving in places, such as container ports and truck terminal yards, where heavy, concentrated loads exceed the capabilities of conventional asphalt pavements. Other key features of SEAM include: - An odorless pellet containing sulphur, plasticizer and additives to control fume and odor during asphalt mixing
- Melts easily on contact with hot asphalt mix; disperses quickly during mixing
- Meets related-use health and safety emissions standards
- No risk of environmental leaching
| In a semi-rigid paving mix consisting of 60% asphalt cement and 40% SEAM, the total SEAM portion will typically make up 2.5% of the final paving mix. |  |
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