What is the cause of adhesive failure in SFRM applications?

Adhesive failure in Spray-Applied Fire-Resistive Material (SFRM) applications can occur due to various factors, and understanding these causes is crucial for ensuring effective fireproofing. Poor substrate preparation is significant because the surface must be clean, dry, and properly treated to ensure strong adhesion. Any contaminants or poorly prepared surfaces can compromise the bond of the fireproofing material.

Excessive moisture is another critical factor affecting adhesion. If moisture is present on the substrate or if the SFRM is applied in high-humidity conditions, it can prevent the adhesive from effectively bonding to the surface. This can lead to failures that compromise the integrity of the fireproofing.

Incorrect installation techniques can also lead to adhesive failures. This may involve improper mixing ratios, incorrect application thickness, or inadequate curing time. Each of these factors can adversely impact how well the fireproofing adheres to the substrate.

Since all these factors—poor substrate preparation, excessive moisture, and incorrect installation technique—can contribute to adhesive failure, the answer encompasses all of them, illustrating that a comprehensive understanding of the application process is essential in preventing such issues in SFRM applications.