FAQs About Threadlockers

At RamProducts.com, we get a lot of questions about threadlockers.

We reply to every question we get. But for your convenience, we’ve condensed all our most common threadlocker questions and answers into one convenient article.

Ready to learn more about threadlockers? Here we go:

Which types of threadlockers are available?

At Ram Products, we offer a number of different types of threadlockers, including threadlockers in liquid, stick, and tape form. As you may have noticed, however, all threadlockers come in different colors. We’ll explain those colors in our next answer.


What’s the difference between red, blue, purple, and green threadlockers?

Threadlockers are available in four different colors. You’ll need to choose different colors for different tasks:

-Red Threadlocker: This is the highest strength threadlocker. It will fully cure in 24 hours and comes in both liquid and semisolid anaerobic (remain liquid until isolated from oxygen in the presence of metal ions, such as iron or copper) forms. Red threadlocker is so powerful, in fact, that you’ll need to apply heat in order to disassemble the array.

-Blue Threadlocker: Blue threadlocker from Loctite® is considered medium strength. Like red threadlocker, this solution cures fully in 24 hours. Blue threadlocker is available in liquid and semisolid forms, but you can also purchase Loctite QuickTape 249 Threadlocker in Blue. Assemblies adhered with blue threadlocker can be taken apart with hand tools.

-Green Threadlocker: This is the recommended way to lock preassembled fasteners – like set screws and electrical connectors. Green threadlockers are available in liquid form and cure in 24 hours. They’re considered medium-to-high strength solutions for wicking and can be removed using heat or hand tools.

-Purple Threadlocker: Purple threadlocker is a specialized threadlocker solution which is typically used on low-strength metals like aluminum or brass.

What is the temperature range of threadlockers?2

Threadlockers obviously play a critical role in a wide range of environments. But what’s the actual temperature range of threadlockers?

All threadlockers have a temperature range between -65F degrees and 300F degrees. However, some threadlockers are capable of withstanding heat as high as 650F degrees.

How do I remove red threadlocker?

Red threadlocker is notorious for its high strength and durability. That’s great when you want two things to stick together. But it can be annoying when you’re trying to pull those things apart.

So how do you remove red threadlocker? The secret is to apply high heat to a small area while unthreading the screw. Specifically, you need to apply localized heat at a temperature higher than 550F degrees before attempting to unthread the screw.

If you do not apply heat higher than 550F or if you do not apply any heat, then you will most likely break the bolt before the threadlocker loosens up.

Where should I use red threadlocker?

Red threadlocker is ideal for a wide range of circumstances. Ideally, red threadlockers will be placed on bolts which range from ¼” to ¾” diameters. Popular threadlocker uses include:

-Heavy duty equipment areas and applications

-Suspension bolts

-Motor mounts

-Bearing caps

How do I apply threadlocker tape?

Some people get confused by threadlocker tape. However, threadlocker tape is remarkably easy to apply. It comes on a low tack film and is ideal for applications where liquid threadlocker cannot be applied (it may be too difficult to apply or too fluid to stay in the right spot).3

Follow these instructions to apply threadlocker tape:

-Carefully apply the material in the direction of the thread

-Then, spin the nut onto the bolt and wait about thirty minutes for the assembly to set

-You can speed up the curing process by applying a primer

-On a 3/8” bolt, you should aim to wrap the thread around two to three times

What are some common projects where I might need to use threadlockers?

Purple threadlocker, which is the lightest and most delicate of the group of threadlockers, is ideal for use on small fastener assemblies. Unlike blue, purple, and green threadlockers, purple can be pulled apart with relative ease. At the same time, it does a good job of locking out moisture and protecting assemblies against the ingress of dust.


Other people use more powerful threadlockers to lock up anything that becomes “loose” around the house or workplace.

Your door may become loose after too many slams or harsh openings, for example. In that case, you could apply one drop of blue liquid threadlocker to the screws and then replace the screw into its original hole for a more secure fit.

For assemblies that require a more secure fit – like snow blowers or lawn mowers – consider using red threadlocker. Red threadlocker is ideal for areas which experience heavy vibration. Red threadlocker protects critical assemblies against corrosion, shocks, vibrations, and other variances.

These are just a few of the situations where you could use threadlocker.

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