What type of product is a wrap strip?

A wrap strip is classified as an intumescent product, which means it has the ability to expand when exposed to heat or fire. This expansion helps to form a barrier that can seal off openings and prevent the spread of smoke and flames through wall penetrations, which is a critical function in firestop applications. Intumescent materials, such as those found in wrap strips, play an essential role in providing passive fire protection by reacting to high temperatures and creating a char that seals the penetration effectively.

In contrast to the other options, non-intumescent sealants do not expand when exposed to heat, which limits their effectiveness in fire scenarios. While a wrap strip may be used in areas that could potentially include caulk for wall applications, it is specifically engineered as an intumescent product, making it more suitable for firestop needs. Additionally, it is not a protective film for cables, rather it is designed to seal around various types of penetrations, reinforcing the firestop system in critical areas. Thus, the classification of a wrap strip as an intumescent product is accurate and underscores its importance in fire safety and compliance.