--- product_id: 13055649 title: "Fire Barrier Moldable Putty Stix MP+, Red Color, One-Part, Re-Enterable, Intumescent, 1.45 in x 6 in" brand: "3m" price: "€ 40.43" currency: EUR in_stock: true reviews_count: 10 category: "3 M" url: https://www.desertcart.gr/products/13055649-fire-barrier-moldable-putty-stix-mp-red-color-one-part store_origin: GR region: Greece --- # STC 56 noise reduction 4-hour fire resistance ready-to-use, moldable putty Fire Barrier Moldable Putty Stix MP+, Red Color, One-Part, Re-Enterable, Intumescent, 1.45 in x 6 in **Brand:** 3m **Price:** € 40.43 **Availability:** ✅ In Stock ## Summary > 🔥 Mold your fire safety future with 3M’s red-hot putty power! ## Quick Answers - **What is this?** Fire Barrier Moldable Putty Stix MP+, Red Color, One-Part, Re-Enterable, Intumescent, 1.45 in x 6 in by 3m - **How much does it cost?** € 40.43 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/13055649-fire-barrier-moldable-putty-stix-mp-red-color-one-part) ## 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 - • **Long-Lasting Seal:** Creates durable draft and cold smoke barriers that won’t dry out or crumble over time. - • **Noise Reduction Power:** STC 56 rating reduces sound transmission—quiet your workspace like a pro. - • **Effortless Application:** One-part, moldable, and re-enterable putty that fits any shape or opening instantly. - • **Metal & Cable Friendly:** Noncorrosive formula safe for metal surfaces and synthetic cable jackets—no compromises. - • **Unmatched Fire Protection:** Certified up to 4 hours per ASTM E814 & CAN/ULC standards—your safety, guaranteed. ## Overview 3M Fire Barrier Moldable Putty Stix MP+ is a professional-grade, intumescent firestop putty stick offering up to 4 hours of certified fire resistance. Its ready-to-use, moldable formula creates durable seals against fire, smoke, drafts, and noise, while remaining re-enterable and noncorrosive—ideal for fire-rated assemblies in demanding industrial environments. ## 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. Formulated dark red, this easily moldable putty stick provides up to 4 hours of fire protection. These putty stix also produce a draft and cold smoke seal and help reduce noise transfer. Review: Critical to fire safety sealing. - 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: Very easy to apply, and very effective - 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 ## Features - TESTED FIRESTOP PERFORMANCE: Tested and listed up to 4-hours in accordance with ASTM E814 (UL 1479) and CAN/ULC S115 - STC RATED: STC-rating of 56 when tested in STC 56-rated wall assembly - READY TO USE IMMEDIATELY: One-part, ready-to-use, re-enterable, intumescent putty stick that can be easily formed to firestop through-penetrations and blank openings in fire-rated assemblies - CREATES A LONG LASTING SEAL: Provides draft and cold smoke seal - REMAINS WORKABLE OVER TIME: Will not dry out or crumble for a re-enterable and repairable solution - NONCORROSIVE: Will not corrode metal and is compatible with synthetic cable jackets - For industrial/occupational use only. Not for consumer sale or use. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B002FYAMPM | | Best Sellers Rank | #46,088 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #131 in Hardware Sealers | | Date First Available | February 28, 2010 | | Is Discontinued By Manufacturer | No | | Item Weight | 1.6 ounces | | Item model number | 98040054540 | | Manufacturer | 3M | | Product Dimensions | 7.9 x 6 x 8.4 inches | ## Images ![Fire Barrier Moldable Putty Stix MP+, Red Color, One-Part, Re-Enterable, Intumescent, 1.45 in x 6 in - Image 1](https://m.media-amazon.com/images/I/51LPfd-5eHL.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Critical to fire safety sealing. *by M***S on September 27, 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. ### ⭐⭐⭐⭐⭐ Very easy to apply, and very effective *by L***R on September 18, 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 ### ⭐⭐⭐⭐⭐ This fire barrier will keep fire from spreading to an adjacent location. *by B***G on April 1, 2024* I've been using 3M fire barrier for 30 plus years. As a requirement under the National Fire Protection Association, it is a requirement when running telecommunications cables through firewalls. Every now and then, I pick up a project that requires me to use this. It is most always readily available, and the price is competitive with other manufacturers. It is also moldable to any form. In my opinion, this is the best fire barrier on the market. ## 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? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.gr/products/13055649-fire-barrier-moldable-putty-stix-mp-red-color-one-part](https://www.desertcart.gr/products/13055649-fire-barrier-moldable-putty-stix-mp-red-color-one-part) --- *Product available on Desertcart Greece* *Store origin: GR* *Last updated: 2026-04-23*