---
product_id: 1998119
title: "37421 271 Red Heavy Duty Threadlocker"
brand: "loctite"
price: "$81102"
currency: COP
in_stock: true
reviews_count: 13
category: "Loctite"
url: https://www.desertcart.co/products/1998119-37421-271-red-heavy-duty-threadlocker
store_origin: CO
region: Colombia
---

# Heat-resistant up to 140°F High-strength hold for large bolts Sets in 10 minutes, full cure in 24h 37421 271 Red Heavy Duty Threadlocker

**Brand:** loctite
**Price:** $81102
**Availability:** ✅ In Stock

## Summary

> 🔧 Lock it down like a pro — because your critical bolts deserve nothing less!

## Quick Answers

- **What is this?** 37421 271 Red Heavy Duty Threadlocker by loctite
- **How much does it cost?** $81102 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co](https://www.desertcart.co/products/1998119-37421-271-red-heavy-duty-threadlocker)

## Best For

- loctite enthusiasts

## Why This Product

- Trusted loctite brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **All-Metal Mastery:** Works flawlessly on stainless steel, aluminum, and plated surfaces—even with minor oil contamination for superior reliability.
- • **Fast-Track Your Fixes:** Quick-setting formula begins curing in 10 minutes, so your projects move faster without compromising durability.
- • **Built to Withstand the Extremes:** Resists heavy shock, vibration, chemicals, and environmental stress, ensuring your assemblies stay locked tight under pressure.
- • **Professional Trust, DIY Confidence:** OEM-specified and lab-tested, this red threadlocker is the go-to for mechanics and managers who demand lasting performance.
- • **Unshakable Grip on Heavy-Duty Hardware:** Engineered for bolts ≥1 inch, securing critical automotive and industrial components with professional-grade strength.

## Overview

LOCTITE 37421 271 Red Heavy Duty Threadlocker is a professional-grade adhesive designed for securing large bolts and studs (≥1 inch) in automotive and industrial applications. It bonds to all metals, including stainless steel and aluminum, with enhanced oil tolerance. The formula sets quickly in 10 minutes and fully cures in 24 hours, providing a durable, heat-resistant hold up to 140°F. Trusted by OEMs and professionals, it withstands heavy shock, vibration, and harsh environments, ensuring critical components stay securely fastened until intentional disassembly with heat.

## Description

LOCTITE Automotive Threadlocker Red 271 is a high-strength, high-temperature adhesive designed for heavy-duty applications where durability and reliability are critical. OEM-specified and trusted by professionals, this anaerobic threadlocker bonds effectively to all metals, including stainless steel, aluminum, and plated surfaces. Its enhanced oil tolerance ensures superior performance in challenging conditions. LOCTITE Red 271 is engineered to secure components exposed to heavy shock, vibration, and extreme chemical environments, making it ideal for use on frame brackets, suspension fasteners, shock absorber mounts, and wheel studs. It is best suited for large bolts and studs with diameters of 1 inch (25 mm) and larger. The threadlocker sets in just 10 minutes and reaches full strength in 24 hours, providing a durable, temperature-resistant bond up to 140°F. Disassembly is easy with localized heating and hand tools. Whether you're working on automotive or industrial applications, LOCTITE Red 271 delivers professional-grade performance and long-lasting results.

Review: Works - Love the lock and unlock tip and work good as well
Review: Cannot beat for large hardware in critical application - Red Loctite is great for big, critical hardware applications. I usually default to blue Loctite for just about all the applications I find, but this time I was replacing wheel bearings and disc brake mounts on a 1 ton pickup, so that included both big hardware AND critical applications - really don't want those working loose over the next 50,000 miles!!! That would be a heck of a surprise. As usual, very easy to use in the tube - just apply a bit to the leading edge of the threads, run the bolt in, and torque it down. Of course, removing hardware with red Loctite is no joke but there's always heat if needed! That also means that the hold is fantastic and again, shouldn't work loose until it's intentionally persuaded with force and/or heat. So ease of removal is not easy at all - but that's the point! Applying out of the tube is very easy: just open the cap and cut off a tiny edge of the nozzle, then apply just a little bit (I've learned not to apply too much - it's just unneeded). Definitely not messy either, which is fantastic. When you apply it to threads, it really clings to the threads, allowing you time to get it in place and run down to torque. But it's also just runny enough to really work its way down into the threads. So overall, if you need to make sure a big piece of critical hardware doesn't move until you absolutely need it to, there's no better option that this red Loctite!

## Features

- Trusted by Professionals: Our red LOCTITE automotive thread locker products are not just OEM-specified, they are trusted by professionals because they are designed by auto manufacturers and lab tested (PN: 37421-487232)
- Works on all metals: Works on all metals, including passive substrates such as stainless steel, aluminum, and plated surfaces; features enhanced minor oil tolerance for superior performance
- Reliable & Durable Performance: Engineered for securing components that endure heavy shock, vibration, and extreme chemical or environmental conditions so it will requires localized heating and hand tools for easy disassembly
- Multi-Application: Perfect for use on frame brackets, suspension fasteners, shock absorber mounts, and wheel studs but ideally works with large bolts and studs with diameters of 1 inch (25 mm) and larger
- Quick-setting for convenience: The product begins setting in just 10 minutes, giving you a quick start on your project, and reaches its full strength after 24 hours, ensuring a complete and durable cure by the next day and is temperature resistant up to 140 degrees

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0028OJAIY |
| Best Sellers Rank | #6,545 in Automotive ( See Top 100 in Automotive ) #27 in Thread Lock Sealers |
| Brand | Loctite |
| Color | Red |
| Customer Reviews | 4.8 4.8 out of 5 stars (1,045) |
| Date First Available | July 7, 2004 |
| Exterior | Packaged |
| Full Cure Time | 24 Hours |
| Global Trade Identification Number | 00079340374218 |
| Is Discontinued By Manufacturer | No |
| Item Form | Tube |
| Item Package Quantity | 1 |
| Item Volume | 6 Milliliters |
| Item Weight | 0.16 ounces |
| Item model number | 37421 |
| Manufacturer | Loctite |
| Manufacturer Part Number | 37421 |
| Material | Metal-based formulation |
| Model | LOCTITE 271 Threadlocker for Automotive | Red, 6 ml Tube |
| Number of Pieces | 1 |
| OEM Part Number | 37421 |
| Package Information | Tube |
| Product Dimensions | 6.5 x 3.81 x 0.8 inches |
| Special Feature | Strong |
| Special Features | Strong |
| Specific Uses For Product | Automotive, Industrial, DIY, Furniture, Heavy-Duty |
| UPC | 079340374218 |
| Viscosity | Low viscosity |
| Viscosity Level | Low |
| Water Resistance Level | Water Repellent |

## Product Details

- **Brand:** Loctite
- **Item Form:** Tube
- **Material:** Metal-based formulation
- **Special Feature:** Strong
- **Specific Uses For Product:** Automotive, Industrial, DIY, Furniture, Heavy-Duty

## Images

![37421 271 Red Heavy Duty Threadlocker - Image 1](https://m.media-amazon.com/images/I/71aDC2eOevS.jpg)

## Questions & Answers

**Q: Would this be 2 heavy for gun sight installation or just what i need?**
A: It might be to much for 271. It was designed for larger treads 3/8 + hold, and might make it impossible to remove at a latter time because of inability to apply enough heat and torque to remove from small treads like a scope mount. use Blue which is for small threads

**Q: Does this product require a primer?  The fourth picture on Amazon suggests it does but the instructions do not mention a primer.  Stainless + aluminum**
A: I didn't need to. I used it on steel threads. Didn't even clean them. Applied this product and assembled. Hardened in minutes. I waiyed 24hrs  before use just in case. Excellent product. I've used in the automobile repair industry for 30yrs.

**Q: Would this be appropriate for the locking nut on a sink faucet, that is always coming loose and making the faucet wobble?**
A: Oh god no! This is for applications of extreme vibration and areas that's could be extremely dangerous if a bolt or nut came loose. All you should need for you faucet is the blue loctite. After using the red, you would need some serious heat and a breaker bar to free that nut if you needed to replace that faucet in the future.

**Q: if it is opened/used, how long will it stay fresh/usable?**
A: Unopened/opened shelf life of Loctite 271 is two years from date of manufacture. Since exposure to oxygen is what keeps the liquid product stable, and it is packaged in a "breathable" plastic bottle, there is no change in shelf life once the product has been opened.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works
*by A***M on August 9, 2025*

Love the lock and unlock tip and work good as well

### ⭐⭐⭐⭐⭐ Cannot beat for large hardware in critical application
*by M***E on June 3, 2025*

Red Loctite is great for big, critical hardware applications. I usually default to blue Loctite for just about all the applications I find, but this time I was replacing wheel bearings and disc brake mounts on a 1 ton pickup, so that included both big hardware AND critical applications - really don't want those working loose over the next 50,000 miles!!! That would be a heck of a surprise. As usual, very easy to use in the tube - just apply a bit to the leading edge of the threads, run the bolt in, and torque it down. Of course, removing hardware with red Loctite is no joke but there's always heat if needed! That also means that the hold is fantastic and again, shouldn't work loose until it's intentionally persuaded with force and/or heat. So ease of removal is not easy at all - but that's the point! Applying out of the tube is very easy: just open the cap and cut off a tiny edge of the nozzle, then apply just a little bit (I've learned not to apply too much - it's just unneeded). Definitely not messy either, which is fantastic. When you apply it to threads, it really clings to the threads, allowing you time to get it in place and run down to torque. But it's also just runny enough to really work its way down into the threads. So overall, if you need to make sure a big piece of critical hardware doesn't move until you absolutely need it to, there's no better option that this red Loctite!

### ⭐⭐⭐⭐⭐ Screws won’t budge
*by G***T on January 20, 2026*

Used this for a rifle stock that was held on by 2 screws that would always come loose when shooting. This stuff kept it locked down with no issues. Highly recommend

## Frequently Bought Together

- Loctite 37421 271 Red Heavy Duty Threadlocker
- Loctite Threadlocker Blue 242 Blue, 0.2 fl oz, 1, Tube
- LOCTITE 242 Threadlocker for Automotive: High-Temp, Medium-Strength, Anaerobic | Blue, 6mL Tube (PN: 37418 - 487229)

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*Product available on Desertcart Colombia*
*Store origin: CO*
*Last updated: 2026-01-25*