Add no index to pdf files

Hi:

I have a website that contains pdf links to products info.

This website is indexing the pdf files despite of the restriction being configured in the robots.txt.

The SEO consultant has recommended adding a no index in the pdf sources.

Searching i found that the way to do it is adding the following code in the Web.config

  <system.webServer>
  <rewrite>
    <outboundRules>
      <rule name="X-Robots-Tag: noindex to .pdf">
        <match serverVariable="RESPONSE_X_Robots_Tag" pattern=".*" />
        <conditions>
          <add input="{REQUEST_FILENAME}" pattern="\.pdf$" />
        </conditions>
        <action type="Rewrite" value="noindex"/>
      </rule>
    </outboundRules>
  </rewrite>
</system.webServer>

Adding this code, Google still indexing the pdf files and blocking them in the robots.txt

Is there any other way to put a no index in pdf files?

Regards,

Jose

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Add no index to pdf files

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