Full Name

AASHTO R94 – Standard Practice for Quality Assurance, Job Site Quality Control, and Reapplication of Protective Sealers for Portland Cement Concrete


This practice covers procedures and test methods for quality assurance testing and job site quality control for protective sealers for protecting new concrete or prolonging the life of sound, inservice concrete used in highway structures.

This practice provides testing methods for routine and job site product quality assurance and for assessing the field performance of sealers, and includes methods to assess when reapplication should be performed.

Sealers are divided into two basic types:

  • coatings – remain on the surface;
  • penetrants – penetrate into the concrete to some measurable depth and do not substantially change the appearance of the concrete.


bridges; concrete; in situ testing; nondestructive testing; penetrating sealers; water absorption