Nontraditional Fog Seal for Asphalt Pavement: Performance on Shoulder Sections in Minnesota

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Status:  Complete
Report Date:  05/24/2018


MnDOT conducted field and lab analyses of nontraditional fog seals used by local agencies around the state. Results show that agriculture-based bioseals offer value in terms of the visibility of existing striping, pavement permeability and perhaps even pavement cracking. But these benefits must be balanced against temporary reductions in retroreflectivity and pavement friction. Traditional fog seals obscure pavement striping and reduce friction even more and for a longer time, but also offer longer-lasting water resistance and durability.

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