June 10, 2009 No Comments Free Sample of Crest Pro-Health Enamel Shield Free Sample of Crest Pro-Health Enamel Shield Crest’s new enamel shield paste and rinse help strengthen and shield enamel against acid attacks resulting from everyday food and drinks. Get your free sample from Walmart. Free Sample of Crest Pro-Health Enamel Shield – EXPIRED Facebook Twitter Add Comment Notify me of follow-up comments by email. Notify me of new posts by email.