Before we start this discussion we have to understand that there is nothing called ‘Fireproof’ in this world. As fire is one of the five basic elements with which all matter and materials are made up of on planet earth, i.e. Earth, Water, Fire, Wind, and Space.
So it is impossible to completely stop any of these elements permanently. But you can definitely make it resistant towards them up to a certain extend.
If any company sells you any product by promising you that their product is fireproof then I think you need to re-think buying the product from them.
UPVC Window and Door Profiles can be fire-resistant up to 2 hours (depending on the quality of Upvc Profiles you are using).
So it is highly recommended before you decide on a Upvc Profile Company you should make sure that the fire resistance capacity of the Upvc Profile is up to 2 hours.