How do I write this in BASH script? Escape Function for Sed

Hi,

I am doing a lot of  find / -name "*" -type f -exec sed -i 's/STRING1/STRING2/' {} \;

But I am going crazy because everytime I need to manually escape chars like / and & in STRING1 and STRING2. Is there a way to write it or perhaps to use a extra function, so I dont have to escape strings like this - > Hosted for free by <a href="http:\/\/www.fleeforum.com" target="_blank">fleeforum.com<\/a> \&copy;  

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