--- product_id: 289914564 title: "3M Fire Barrier Moldable Putty Stix MP, 1.45 in x 6 in" brand: "3m" price: "305 zΕ‚" currency: PLN in_stock: true reviews_count: 5 category: "3 M" url: https://www.desertcart.pl/products/289914564-3m-fire-barrier-moldable-putty-stix-mp-1-45-in store_origin: PL region: Poland --- # STC 56 noise reduction 4-hour firestop rating pliable, moldable design 3M Fire Barrier Moldable Putty Stix MP, 1.45 in x 6 in **Brand:** 3m **Price:** 305 zΕ‚ **Availability:** βœ… In Stock ## Summary > πŸ”₯ Mold your safety, seal your peace of mind. ## Quick Answers - **What is this?** 3M Fire Barrier Moldable Putty Stix MP, 1.45 in x 6 in by 3m - **How much does it cost?** 305 zΕ‚ with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/289914564-3m-fire-barrier-moldable-putty-stix-mp-1-45-in) ## Best For - 3m enthusiasts ## Why This Product - Trusted 3m brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Noise Reduction Power:** Helps reduce sound transfer with an STC rating of 56, perfect for quiet professional spaces. - β€’ **Smoke & Draft Defense:** Creates a reliable seal against cold smoke and drafts, enhancing building integrity. - β€’ **Durable & Re-Enterable:** Won't dry out or crumble, allowing easy repairs and long-term performance. - β€’ **Effortless Moldability:** Pliable putty that conforms seamlessly around cables and openingsβ€”no tools needed. - β€’ **Unmatched Fire Protection:** Certified up to 4 hours per ASTM E 814 & CAN/ULC S115 for ultimate safety. ## Overview 3M Fire Barrier Moldable Putty Stix MP is a UL/CSA certified, intumescent firestop putty stick designed for up to 4 hours of fire protection. Its pliable, moldable formula seals penetrations and openings against fire, smoke, drafts, and noise, while maintaining flexibility and adhesion for long-lasting, re-enterable use. ## Description 3M Fire Barrier Moldable Putty Stix MP+ is a one-part, re-enterable, intumescent putty that can be easily formed to firestop through penetrations and blank openings in fire-rated assemblies. We formulated this dark red, easily moldable putty stick to provide up to 4 hours of fire protection. These putty stix also produce a draft and cold smoke seal and help reduce noise transfer. Review: I use this for blocking holes in engine firewalls. It molds easily around cables and wires and sticks well to block the holes. I have not checked its fire resistance. After a year it is still flexible and stuck in place. Does the job of blocking fumes from making their way out of the engine compartment. Review: This is the Ul/CSA certified stuff that works! I was rebuilding a Suburban RV furnace and needed a fire/heat certified putty to replace the 30 year old stuff used to seal the fuel gas supply line between the heat exchanger and blower enclosure. This is a fire safety item and I did not want to trust the foreign-sourced material. I was delighted to find this 3M product here on AMZ. Genuine 3M quality sticky stuff that seals perfectly and likely to endure another 30 years. I had to look up the word 'intumescent' lol. Oh, yeah, just what is needed. ## Features - Firestop tested up to 4 hours in accordance with ASTM E 814 (UL 1479) & CAN/ULC S115 - Putty provides draft and cold smoke seal - Pliable and conformable design easily molds into required shapes - Helps reduce noise transfer (STC-Rating of 56 when tested in STC 56-rated wall assembly) - Will not dry out or crumble for a re-enterable and repairable solution.Excellent adhesion and aging properties provide a long-term performance ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B002FYAMPM | | Best Sellers Rank | #104,951 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #106 in Digital Calipers | | Item model number | 98040054540 | | Manufacturer | 3M | | Product Dimensions | 20.07 x 15.24 x 21.34 cm; 45.36 g | ## Images ![3M Fire Barrier Moldable Putty Stix MP, 1.45 in x 6 in - Image 1](https://m.media-amazon.com/images/I/51LPfd-5eHL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by S***E on 21 October 2020* I use this for blocking holes in engine firewalls. It molds easily around cables and wires and sticks well to block the holes. I have not checked its fire resistance. After a year it is still flexible and stuck in place. Does the job of blocking fumes from making their way out of the engine compartment. ### ⭐⭐⭐⭐⭐ Review *by M***S on 27 September 2025* This is the Ul/CSA certified stuff that works! I was rebuilding a Suburban RV furnace and needed a fire/heat certified putty to replace the 30 year old stuff used to seal the fuel gas supply line between the heat exchanger and blower enclosure. This is a fire safety item and I did not want to trust the foreign-sourced material. I was delighted to find this 3M product here on AMZ. Genuine 3M quality sticky stuff that seals perfectly and likely to endure another 30 years. I had to look up the word 'intumescent' lol. Oh, yeah, just what is needed. ### ⭐⭐⭐⭐⭐ Review *by L***R on 18 September 2020* I needed something to block openings around the electrical boxes for lights and smoke detectors in my ceiling, and this is a much better option than only using caulk (at least in areas where the red color doesn't show). I'm impressed with how easy it is to mold into the right shape with its putty consistency - as well as its ability to be stuffed into odd shaped openings. The fire retardant capability is a great plus ## Frequently Bought Together - 3M Fire Barrier Moldable Putty Stix MP+, Red Color, One-Part, Re-Enterable, Intumescent, 1.45 in x 6 in - 3M Fire Barrier Sealant CP 25WB+, Red Color, One-Component, Gun-Grade, Latex-Based, Intumescent Material, 10.1 fl oz Cartridge - 3M Fire Block Foam FB-Foam, Orange Color, Ready-To-Use, Foam-In-Place, 12 fl oz Can --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pl/products/289914564-3m-fire-barrier-moldable-putty-stix-mp-1-45-in](https://www.desertcart.pl/products/289914564-3m-fire-barrier-moldable-putty-stix-mp-1-45-in) --- *Product available on Desertcart Poland* *Store origin: PL* *Last updated: 2026-04-26*