Choose a Walker Industries Company Walker Industries Holdings Limited Human Resources: Careers -- Walker Brothers Quarries Vineland Quarries & Crushed Stone Ridgemount Quarries Spring Creek Aggregates Georgian Aggregates & Construction Inc Norjohn Contracting and Paving Georgian Construction Walker Brothers Asphalt -- Woodington Systems Inc Niagara Waste Systems Limited Norjohn Transfer Systems Limited -- Infrastructure Development & Management (iDM) Integrated Gas Rescovery Services(IGRS) Integrated Municipal Services(IMS) -- Norjohn Emulsions Walker Community Development Corporation

	Tack Coat is an emulsified asphalt product used as a binder between multiple lifts of asphalt in order to ensure that each lift adheres to the other. Regulations and application rates for different surfaces and types of asphalts are in accordance with Ontario Provincial Standard pecifications (OPSS)
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