Exclude products from a certain category from internal search results?

[marvays]

Hi.
Does anyone know how to prevent a product from appearing in internal search?
I have products that we no longer sell. But I have them active and inserted in the private category. I need to make sure it doesn't appear when a user searches the web. I don't know of any options

[Studio 42]

Remove the categories from product, then he do not appear on search

[marvays]

If there is no other way. . .
Thx