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Semstone 305 polymer concrete is an excellent alternatives to acid brick. It is used to protect Portland cement concrete from attack from a wide range of aggressive chemicals. Semstone 305 polymer concrete can be applied from 1/2” (12.7 mm) to several inches thick. Applied by screed and trowel method, their installation is quick and easy. Semstone 305 provides a monolithic surfacing that has excellent resistance to impact and mechanical abuse and can be used to restore and protect degraded surfaces in a single application.