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Depending on the product and conditions of the fire it can also produce toxic fumes causing permanent health damage. Try not to use them at all. Take care to cut and install fire protection so that it fits exactly. Use proper collars and seals if compartments need to be penetrated.
While fire rated foam expands on application, it sets hard and will not expand further and seal up a hole when a fire breaks out. This additive will then slowly migrate to the edges of the foam before forming lines on the surface.Some fire-resistant foams are specifically designed and tested to fill larger gaps. Closely follow the conditions of use stated in the certification if installing a fire-rated foam product Fire foams are usually tinted pink to distinguish them from other non-fire rated foams, but they’re all different and have varying functions and properties - make sure you’re using the right one.
With no evidence of the installer or products used it is un-likely that any Foam can be warranted by anyone and should be removed and replaced. There is not a one standard does all for expanding fire foams, as they have been tested differently.
Nullifire FF197 foam is also well known in the industry and can be used in fire door and concrete applications. A common mistake is for fire rated foam to be used in situations where intumescent sealant is better suited. As it is non-combustible, it won’t catch fire and therefore won’t contribute to the spread of fire through a building.