---
product_id: 3861038
title: "Loctite 243"
brand: "loctite"
price: "HK$143"
currency: HKD
in_stock: null
reviews_count: 13
category: "Loctite"
url: https://www.desertcart.hk/products/3861038-loctite-243
store_origin: HK
region: Hong Kong
---

# Resists temps up to 140°F Medium-strength bond Sets in 10 minutes Loctite 243

**Brand:** loctite
**Price:** HK$143
**Availability:** ❌ Out of Stock

## Summary

> 🔩 Lock it down with Loctite 243 — where strength meets speed!

## Quick Answers

- **What is this?** Loctite 243 by loctite
- **How much does it cost?** HK$143 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/3861038-loctite-243)

## 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

- • **Fast-Acting Formula:** Achieves initial set in just 10 minutes for quick repairs
- • **Oil-Tolerant Adhesion:** Performs flawlessly even on oily or contaminated surfaces
- • **Trusted by Professionals:** OEM-specified and top-rated for automotive & mechanical use
- • **Reliable Medium-Strength Hold:** Secures nuts & bolts from ¼" to ¾" with confidence
- • **Durable Temperature Resistance:** Maintains bond integrity up to 140°F under stress

## Overview

Loctite 1330799 Blue 243 Threadlocker is a medium-strength, oil-resistant adhesive designed for automotive and mechanical applications. It bonds securely to all metals, sets in 10 minutes, and withstands temperatures up to 140°F, making it ideal for fast, reliable fastening of nuts and bolts exposed to vibration, shock, and chemicals.

## Description

LOCTITE Automotive Threadlocker Blue 243 is a medium-strength, medium-temp, oil-tolerant adhesive designed for general-purpose automotive applications. 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 reliable performance, even in challenging conditions. LOCTITE Blue 243 is ideal for securing components that endure heavy shock, vibration, and chemical exposure. It works perfectly on rocker studs, adjustment bolts, valve and cam covers, oil pans, disc brake calipers, intakes, alternators, and pulley assemblies. Suitable for all nut and bolt applications ranging from ¼" to ¾" (6 mm to 20 mm). The product sets in just 10 minutes, allowing for a fast start, and reaches full strength within 24 hours, providing a durable, temperature-resistant bond up to 140°F. LOCTITE Blue 243 delivers long-lasting, reliable results for your automotive repair and maintenance needs.

Review: Great product for a firearm - I bought this to use on a firearm and I must say I am very impressed. I used loctite 242 and it produced some great success but using it in conjunction with oily areas of the rifle, it seems to cause issues. It appears either I had to carefully apply oil or just never oil the area. Then came this product after reading around. The maximum temperature threshold for loctite 242 is about 200 degrees. With Loctite 243 it's almost twice that nearing 360 degrees. On top of that, it is indeed surface insensitive when you apply it. Before going all crazy with this product, I decided to give it a garage science test. My favorites are Loctite 242, and Rocksett and finally the newcomer, 243. I got a scope mount that had set screws to torque it down. What I did was for each screw I would wipe it completely clean with rubbing alcohol, and simply apply each product. Each product worked as advertised and to unscrew I had to apply above average torque to break loose. Then I cleaned it all again and got the stuff off the screw. I then applied a light oil on the surface and wiped it down with a towel the best I could to get it somewhat dry but still have oil on it that you can't see. The loctite 242, and Rocksett both failed. I could unscrew it by hand after waiting 1 week and it even seemed like it was loose before even trying to unscrew it. With loctite 243, it had the same amount of torque required to unscrew it and it was on really tight. It seems like it is working as advertised. My guess is if loctite 243 fail, it will fail due to high temperature but that is expected on a firearm. It's impossible to really say how hot a firearm can get as it depends on how much you shoot and all that. From reading online military manuals, it appears that the expected temperature range depends on location of the barrel. On a rifle, it appears the average temperature for near the muzzle is about 400-600 degrees and this is shooting approximately 1 round per second until 60 rounds are fired. Of course that is on the surface of the barrel and the question is transferring that heat off the barrel to where the set screws are different questions. It's only a matter of time before this is figured out and I believe so long as whatever it is torqued correctly I shouldn't see any issues. Overall I am impressed with this product. It does work very well and I highly recommend it for firearm folks who are looking for something that can still oil over. You don't have to go all crazy with taking off the oil on the screw when you install whatever it is you're installing. However, I still recommend doing that just to be sure you have the best application possible. From there, you can apply oil to your heart desire without worry about it breaking loose. As a side note, another product I'm looking into is loctite 246. This is the same stuff as 243 where it is surface insensitive, BUT it has a higher temperature threshold. I also notice loctite 246 has a expiration date but the loctite 243 doesn't. Not sure what the shelf life is on this but that is another thing I will monitor on my own.
Review: good stuff - does the job as advertised! Thank you

## Features

- Fit type: Vehicle Specific

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B004L439FE |
| Best Sellers Rank | #3,936 in Automotive ( See Top 100 in Automotive ) #18 in Thread Lock Sealers |
| Brand | Loctite |
| Color | Blue,Red |
| Customer Reviews | 4.8 4.8 out of 5 stars (3,218) |
| Date First Available | July 7, 2004 |
| Exterior | Packaging |
| Full Cure Time | 24 Hours |
| Global Trade Identification Number | 00079340439078 |
| Is Discontinued By Manufacturer | No |
| Item Form | Liquid |
| Item Package Quantity | 1 |
| Item Volume | 6 Milliliters |
| Item Weight | 0.317 ounces |
| Item model number | 1330799 |
| Manufacturer | Loctite |
| Manufacturer Part Number | 1330799 |
| Material | Aluminum,Stainless Steel |
| Model | Loctite 1330799 Threadlocker 243 Surface Insensitive-Medium Strength Tube, Blue, 6-ml |
| Number of Pieces | 1 |
| OEM Part Number | 1330799 |
| Package Information | Tube |
| Product Dimensions | 6.5 x 3.81 x 1.25 inches |
| Specific Uses For Product | Automotive, Mechanical |
| UPC | 079340439078 |
| Viscosity | Medium |
| Viscosity Level | Medium |
| Water Resistance Level | Water Resistant |

## Product Details

- **Brand:** Loctite
- **Color:** Blue,Red
- **Item Form:** Liquid
- **Material:** Aluminum,Stainless Steel
- **Specific Uses For Product:** Automotive, Mechanical

## Images

![Loctite 243 - Image 1](https://m.media-amazon.com/images/I/61p9OI97z8L.jpg)
![Loctite 243 - Image 2](https://m.media-amazon.com/images/I/61uM07UJLoL.jpg)
![Loctite 243 - Image 3](https://m.media-amazon.com/images/I/71A-PcGV2VL.jpg)
![Loctite 243 - Image 4](https://m.media-amazon.com/images/I/71Vi7okl0PL.jpg)
![Loctite 243 - Image 5](https://m.media-amazon.com/images/I/71dqkWK6cDL.jpg)

## Questions & Answers

**Q: is there a loctite that resists gasoline ?**
A: Most of our Loctite anaerobic sealants and threadlockers will resist gasoline once they're fully cured. The right product will depend on your application requirements. Please call 1-800-LOCTITE (562-8483) to receive a product recommendation from one of our engineers.

**Q: How do I open the Loctite 243 bottle?**
A: You simply twist the cap and it should open.

**Q: Is this good to use on battery cable bolts?**
A: Yes this can be used on the threads.  Loctite 243 is a plastic so keep it off the post where good electrically conductive contact is required.
I am thinking a car battery here.   If this is a different design and IF THIS  THREADED ASSEMBLY REQUIRES ELECTRICALLY CONDUCTIVY DO NO USE OUR PLASTIC THREADLOCKER IT WILL INSULATE AND GENERATE RESISTANCE.

**Q: Can this still be effective on a bolt that is threaded, left to sit, and then threaded again to torque spec?**
A: Left for set how long? When you remove the bolt, if it's still wet then yes, but I would wipe it off and reapply because I would want a thicker application for a tighter bond.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great product for a firearm
*by D***A on June 6, 2015*

I bought this to use on a firearm and I must say I am very impressed. I used loctite 242 and it produced some great success but using it in conjunction with oily areas of the rifle, it seems to cause issues. It appears either I had to carefully apply oil or just never oil the area. Then came this product after reading around. The maximum temperature threshold for loctite 242 is about 200 degrees. With Loctite 243 it's almost twice that nearing 360 degrees. On top of that, it is indeed surface insensitive when you apply it. Before going all crazy with this product, I decided to give it a garage science test. My favorites are Loctite 242, and Rocksett and finally the newcomer, 243. I got a scope mount that had set screws to torque it down. What I did was for each screw I would wipe it completely clean with rubbing alcohol, and simply apply each product. Each product worked as advertised and to unscrew I had to apply above average torque to break loose. Then I cleaned it all again and got the stuff off the screw. I then applied a light oil on the surface and wiped it down with a towel the best I could to get it somewhat dry but still have oil on it that you can't see. The loctite 242, and Rocksett both failed. I could unscrew it by hand after waiting 1 week and it even seemed like it was loose before even trying to unscrew it. With loctite 243, it had the same amount of torque required to unscrew it and it was on really tight. It seems like it is working as advertised. My guess is if loctite 243 fail, it will fail due to high temperature but that is expected on a firearm. It's impossible to really say how hot a firearm can get as it depends on how much you shoot and all that. From reading online military manuals, it appears that the expected temperature range depends on location of the barrel. On a rifle, it appears the average temperature for near the muzzle is about 400-600 degrees and this is shooting approximately 1 round per second until 60 rounds are fired. Of course that is on the surface of the barrel and the question is transferring that heat off the barrel to where the set screws are different questions. It's only a matter of time before this is figured out and I believe so long as whatever it is torqued correctly I shouldn't see any issues. Overall I am impressed with this product. It does work very well and I highly recommend it for firearm folks who are looking for something that can still oil over. You don't have to go all crazy with taking off the oil on the screw when you install whatever it is you're installing. However, I still recommend doing that just to be sure you have the best application possible. From there, you can apply oil to your heart desire without worry about it breaking loose. As a side note, another product I'm looking into is loctite 246. This is the same stuff as 243 where it is surface insensitive, BUT it has a higher temperature threshold. I also notice loctite 246 has a expiration date but the loctite 243 doesn't. Not sure what the shelf life is on this but that is another thing I will monitor on my own.

### ⭐⭐⭐⭐⭐ good stuff
*by W***. on September 28, 2025*

does the job as advertised! Thank you

### ⭐⭐⭐⭐⭐ This is the stuff, goldilocks, not too strong, not too weak, just right for medium-small screws
*by C***N on September 24, 2023*

This is perfect for smaller screws that still need a firm hold, without being so strong that you will strip anything if you need to remove them. Red is too strong, purple is too weak, blue is just right. This is not for heavy equipment or automative or anything like that, more for hobby and light industrial applications, may have some military use, set screws that sort of thing.

## Frequently Bought Together

- LOCTITE 243 Automotive Threadlocker Blue - Medium Strength Thread Lock, General Purpose, Oil Tolerant - 6 ml, 1 Pack
- LOCTITE 263 Automotive Threadlocker Red – High Strength Thread Lock, General Purpose Applications, Oil Tolerant, Fluorescent - 6 ml, 1 Pack
- Loctite 38653 222 Purple Low Strength Thread Locker Tube - 6 ml

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---

*Product available on Desertcart Hong Kong*
*Store origin: HK*
*Last updated: 2026-01-24*