All 3M™ Fire Barrier Caulks have either intumescent, endothermic or ablative technologies that provide a tight and dependable seal against fire, smoke, toxic fumes and moisture.

Our pillows intumesces (expands) and locks itself into place, completely surrounding the penetrant(s) stopping smoke, fire and toxic gases from spreading to the next room or next floor for the rated time period. They are easy to install and great for retrofit project.

Prevent the spread of fire for up to four hours. Flexible silicone elasomers help prevent the spread of fire, smoke, toxic fumes and moisture. Ideal for dynamic construction joints and gaps, and accommodate vibration from normal building movement.