Best Fire Barrier Caulk of 2025

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 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.

The 3M Fire Barrier Sealant CP 25WB+ is an easy-to-apply sealant that helps prevent fire spread through openings in fire barriers. This product is ideal for commercial, industrial, and residential applications where mechanical services pass through. It can expand up to three times its dried volume when exposed to temperatures above 1000°F and is listed in hundreds of UL Firestop systems with up to 4-hour ratings. The sealant can be used for HVAC ducts, pipes, cables, through-penetrations, and more, and it also has excellent adhesion to a variety of materials. Additionally, it acts as a barrier to help minimize sound transmission.

Introducing the 3M Fire Barrier Sealant FD 150+, a top-notch firestop solution for your construction needs. This red-colored fire barrier caulk has been rigorously tested and proven to withstand fire for up to 3 hours, meeting the standards set by ASTM E 814 (UL 1479) and CAN/ULC S115. Additionally, its fire resistive joint system has been tested for up to 4 hours in accordance with ASTM E 1966 (UL 2079). The continuous seal of this sealant remains pliable, allowing for typical pipe movement without compromising its fire-resistant properties. With the 3M Fire Barrier Sealant FD 150+, you can ensure the safety of your building and the peace of mind of its occupants.

The 3M Fire Barrier Sealant offers exceptional fire protection, having been tested to withstand fire for up to three hours according to industry standards. This means that you can feel secure knowing that your construction joints are well-protected. It also has a remarkable four-hour fire resistance for construction joint systems, providing added peace of mind. The sealant is designed for optimal adhesion to various building materials, ensuring a strong bond. With a compression and extension capability of ±13%, it accommodates movement, making it ideal for dynamic environments.

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 CP 25WB+ is a premium intumescent latex sealant designed for fire and smoke protection. It has been rigorously tested, offering up to four hours of fire resistance, which provides peace of mind in safety applications. The sealant features a high Sound Transmission Class (STC) rating of 54, reducing airborne noise between spaces. Its unique formulation ensures strong adhesion and sag resistance, making it easy for you to apply cleanly on walls and floors. Plus, it is water-based, allowing for simple cleanup and the ability to paint or repair as needed.

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 3M Fire Barrier Pillows are innovative firestops that expand when exposed to heat, creating a tight seal around essential cables and conduits. This feature is crucial for preventing the spread of flames, smoke, and toxic gases during a fire. You will appreciate the ease of installation, as these pillows can be removed and repositioned without the need for additional support or wire mesh, saving you time and effort. With a fire rating of up to three hours, they provide robust protection for various applications, including conduit banks and cable racks. They are perfect for medium to large openings, ensuring comprehensive safety in your space.

The 3M Fire Barrier Block B258 is a versatile fire barrier caulk designed for medium to large applications. It is tested and listed to provide up to 2 hours of fire protection, preventing the transmission of fire, smoke, and toxic gases. This pre-formed foam block maintains a tight firestop seal, ensuring maximum safety. One of the standout features of this product is its no cure time, allowing for quicker project completion. Additionally, the block is paintable with primer, making it easy to match any wall or floor. Installation is a breeze and requires no special tools. The 3M Fire Barrier Block B258 is part of a complete system and can be sealed with other 3M fire barrier sealants for added protection. It is ideal for industrial and occupational use.