Road American
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Primer seal emulsions are formulated with low-viscosity base bitumen, controlled residue content, and slow-setting emulsifiers to allow penetration into porous surfaces. The formulation balances breaking time so the emulsion wets the substrate before breaking, forming a uniform bitumen film. Additives may be used to improve adhesion to dusty or marginal surfaces. Compatibility with the subsequent asphalt or seal layer is verified through adhesion and break tests using representative aggregates.
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