3M Fire Barrier Plank PK39, Maroon, 39.37 in x 5.12 in x 2.36 in, 3/Case

• Block is paintable with primer
• Can be repaired and reused as needed, saving time and labor
• Can be sealed with 3M Fire Barrier Rated Foam FIP 1-Step and other 3M fire barrier sealants (sold separately)
• Firestop tested in accordance with ASTM E 814/UL 1479
• Fits medium to large openings in wall and floor through-penetrations
• Installation requires no special tools
• No cure time means faster completion
• Pre-formed foam 1 meter (approximately 39 inches) foam plank block maintains tight firestop seal to prevent fire, smoke and toxic gas transmission

3M Fire Barrier Plank PK39 is a pre-formed foam plank designed for easy installation to effectively seal larger openings against smoke, toxic gas and flame. It is simple to use and helps reduce sound transmission.

A Better Way to Fill Large Gaps
When sealing larger cavities, use 3M™ Fire Barrier Plank PK39 to restore the integrity of the wall with a simple "stack, seal, and done" application, without the use of special tools. The blocks are engineered to remain securely in place, eliminating traditional wire mesh reinforcements. Pre-formed blocks help technicians fill large openings quickly. The material is easy to trim on site without special tools, achieving a tight, custom fit. No cure time is required, which means installation is completed faster, and the blocks are paintable with primer for a more seamless appearance.

The blocks are fully re-enterable and reusable, saving time and money, while minimizing waste. Once the opening is filled, seal around the perimeter and any penetrating items with 3M™ Fire Barrier Rated Foam FIP 1-Step or other 3M™ fire barrier sealants (sold separately).

Recommended Applications

• Blank openings
• Metal pipes
• Cables
• Cable trays
• Insulated pipes, combination penetrations

Fully Tested and Approved
3M™ Fire Barrier Plank PK39 are firestop tested to the criteria of ASTM E 814/UL 1479 Standard Test Method for Fire Tests of Penetration Firestop Systems, ASTM E 84/UL 273 Standard Test Method for Surface Burning Characteristics of Building Materials, ASTM E 90 Standard Test Method for Laboratory Measurement of Airborne Sound Transmission Loss of Building Partitions and Elements, and ASTM E 413 Classification for Rating Sound Insulation. Reliable and Affordable Fire Protection Effective and easy to install, 3M™ Fire Barrier Plank PK39 are part of our family of fire protection products that offer the broadest, long-lasting solutions for a variety of commercial, industrial and residential applications. As a trusted leader in the fire protection industry, 3M offers a broad line of affordable products designed to meet the most demanding firestop requirements. Find the solution you need from the industry-preferred line of fire protection products.

Trusted 3M Fire Barrier

The 3M Fire Barrier Plank PK39 offers reliable protection with its trusted brand and model. This maroon plank is designed to seal openings effectively, helping to prevent fire, smoke, and toxic gas transmission. Its proven performance makes it a dependable choice for firestop applications.

Engineered for easy installation, the PK39 model fits medium to large wall and floor openings. Its pre-formed foam structure ensures a tight seal without needing special tools, making it a practical solution for various commercial and residential projects.

Precise Dimensions Fit

Measuring 39.37 inches by 5.12 inches by 2.36 inches, this fire barrier plank is sized to fill larger gaps efficiently. The dimensions allow for a custom fit, as the plank can be trimmed on site without special equipment, ensuring a seamless installation.

These exact measurements help technicians restore wall integrity quickly, eliminating the need for wire mesh reinforcements. The size also supports sound transmission reduction, adding value beyond fire protection.

Convenient Three Case Pack

Sold in packs of three, the 3M Fire Barrier Plank PK39 provides enough material for multiple installations or larger projects. This pack size helps reduce ordering frequency and simplifies inventory management for contractors.

Having three planks per case means you can tackle several medium to large openings at once, saving time on site. The pack format supports efficient job planning and cost control.

Simple Installation Process

Installation requires no special tools, making the 3M Fire Barrier Plank PK39 easy to use for professionals and DIYers alike. The pre-formed foam plank stacks securely in place, speeding up the sealing process without extra hardware.

No cure time is needed, so projects finish faster. The blocks are paintable with primer, allowing for a neat, finished look that blends with surrounding surfaces after installation.

Reusable Firestop Solution

This fire barrier plank is fully re-enterable and reusable, which saves time and labor costs over multiple uses. If repairs or adjustments are needed, the blocks can be removed and reused without waste.

When combined with 3M Fire Barrier Rated Foam FIP 1-Step or other 3M sealants, the PK39 plank offers a complete firestop system that meets ASTM E 814/UL 1479 testing standards, ensuring safety and compliance.