Hide Search result with Particular attribute values

Hi Everyone,

I have around 5k products in my dashboard, i want to hide around 2k products from appearing in my results when searched.
There is a attribute called productType , based on that i want to hide some particular products,
Example: if the product is having productType:“chocolate cookie” and productType:“chocalates” i never want the products having that productType to appear in the search results.

can someone help me how can the above usecase be done. I am using react instant search.