According to the Thermofisher's website (please check the link bellow)

These new recombinant secondary antibodies eliminate cross-reactivity and give much lower background in immunocytochemsity. Has anybody tried that? How does it compare to the molecular probe secondary antibodies? 

Thanks.

https://www.thermofisher.com/au/en/home/life-science/antibodies/secondary-antibodies/superclonal-secondary-antibodies.html