Redactor stripping script/html tags I wasn't to allow a user to enter html into the Rich Text field.

The html in question is: 

&lt;div class="issuuembed" style="width: 525px; height: 525px;" data-configid="7563847/30149275"&gt;&lt;/div&gt;
&lt;script src="//e.issuu.com/embed.js" async="true" type="text/javascript"&gt;&lt;/script&gt;


I can save the entry and on the front end the content displays ok - but when I go back in to edit the entry it is no longer there - the div and script tags have been removed.

I tried adding this 

replaceDivs: false,

to the config but it doesn't make any difference
Please do yourself a favor and don't do this  in Redactor. Find a solution with Matrix (and/or Super Table) to add things like this in-between your text blocks.