Best Fire Barrier Caulk of 2026

The 3M Fire Barrier Sealant is designed to help you meet building codes by sealing openings where mechanical systems pass through fire barriers. This sealant can expand up to three times its size when exposed to high heat, helping to stop fires from spreading quickly. It’s versatile, working in many settings with fire resistance ratings of up to four hours, so you can trust it in various applications like HVAC ducts, pipes, and cables. Plus, it’s easy to use with no mixing needed, and its thick consistency prevents drips, making your work cleaner and faster.

3M TALC Fire Barrier Sealant is a versatile product that provides effective fire protection for commercial, industrial, and residential applications. It is designed to seal openings through fire barriers where mechanical services pass through. With its ability to expand a minimum of 3 times its dried volume when exposed to high temperatures, this sealant helps prevent the spread of fire. This product is listed in hundreds of UL Firestop systems with up to 4-hour ratings, making it suitable for a variety of applications such as HVAC ducts, pipes, cables, and more. The easy and clean application process, along with its excellent adhesion to different materials, ensures a hassle-free experience. Additionally, it acts as a barrier to minimize sound transmission, enhancing the overall environment.

The 3M Fire Barrier Sealant is designed to provide strong protection against fire and smoke, lasting up to four hours according to strict safety standards. This means you can trust it to help keep your space safe in case of a fire. It also offers excellent soundproofing, reducing noise through walls, which is great for maintaining a quiet environment. The sealant is latex-based and expands when exposed to heat, helping to seal gaps effectively. Plus, its special formula resists sagging, making it easier to apply neatly on both walls and floors, ensuring a clean and secure finish for your project.

The 3M Fire Barrier Sealant CP 25WB+ is a firestop sealant that helps prevent the spread of fire. In addition to its ability to seal openings in fire barriers where mechanical services pass through, this sealant can be used for HVAC ducts and vents, pipes, blank openings, cables, through-penetrations, busways, combos, rated wall, floor and floor-ceiling assemblies and more. It is easy to use and apply, with no mixing required, and has sag-resistant properties. This sealant is also designed to exhibit strong adhesion to a full range of construction substrates and penetrants while also acting as a barrier to minimize sound transmission.

The 3M Fire Barrier Sealant FD 150+ is a fire barrier caulk that is firestop tested up to 3 hours and fire resistive joint system tested up to 4 hours. Its continuous seal remains pliable and allows for typical pipe movement, while being water-based for easy installation, cleanup, and disposal.

3M TALC Fire Barrier Sealant is a versatile and reliable solution for firestopping metal pipes or cables through concrete or gypsum, as well as in dynamic head-of-wall systems. This acrylic latex-based sealant offers an economical alternative to traditional firestopping methods. It has been tested and listed for through-penetrations and construction joints, providing a continuous seal that remains pliable to accommodate typical pipe movement. The water-based formula allows for easy installation, cleanup, and disposal, making it a convenient choice for industrial and occupational use. Additionally, this sealant can act as a sound barrier, helping to minimize noise transfer. With its high-solids formula and re-enterable and repairable properties, 3M TALC Fire Barrier Sealant FD 150+ is a reliable choice for your fire barrier caulking needs.

The 3M Fire Barrier Foam is a reliable solution for firestop needs, providing up to 2 hours of protection in compliance with industry standards. Its sound transmission class (STC) rating of 57 ensures noise reduction, making it ideal for quiet environments. This two-part urethane foam expands significantly upon application, filling gaps and creating a strong seal against smoke and fire. Additionally, the foam remains flexible after installation, allowing for easy repairs or adjustments whenever necessary. With excellent adhesion, it can be applied without needing backing materials, simplifying your installation process.

The Red Devil Fire Barrier Caulk is a high-quality sealant that adheres to most common construction and penetrant materials. It contains no solvents, making it safe for use with most plastics. One of its standout features is its ability to expand up to 10 times its original size, providing a tight and secure seal. Additionally, it does not shrink in most applications, ensuring long-lasting protection. The Red Devil Fire Barrier Caulk is also paintable at full cure with non-solvent paints, allowing you to seamlessly blend it with your surroundings. With its mild latex odor and water clean-up, this caulk is easy to use and VOC compliant. Overall, this versatile and reliable product offers excellent fire protection and ease of application.

The 3M™ Fire Barrier Sealant FD 150+ is an acrylic latex-based sealant that is tested and listed for through-penetrations up to 3-hours and construction joints up to 4-hours. It offers a flexible hold with limited shrinkage and is easy to clean up with water. The continuous seal remains pliable and allows for typical pipe movement, making it a re-enterable and repairable fire barrier solution. It is ideal for industrial/occupational use only.

The 3M Fire Barrier Pillows provide reliable fire protection with a tested performance of up to three hours, giving you peace of mind for safety. These pillows are self-contained and intumescent, meaning they expand when exposed to heat to seal openings like cable trays and conduits, effectively stopping fire spread. They also help block smoke when used with 3M Fire Barrier Moldable Putty, improving your smoke protection. Installation is simple and convenient since you can remove and reuse the pillows as needed without extra materials like wire mesh, saving you time and effort during retrofits or inspections.