Permatex 24300 Blue Surface Insensitive Threadlocker - 0.34 oz.

by Permatex

Product Features

• Prevents vibration loosening
• Oil resistant
• Removable with hand tools for easy disassembly
• Suggested Applications: Rocker studs, rocker adjustment bolts and bolts on valve and cam covers, oil pans, disc brake calipers, intakes, alternators and pulley assemblies

Product Details

View Technical Data Sheet [PDF]

• Product Dimensions: 0.8 x 3.8 x 6.5 inches ; 1 ounces
• Shipping Weight: 1.1 ounces (View shipping rates and policies)
• Shipping: This item is also available for shipping to select countries outside the U.S.
• ASIN: B000HBM5TQ
• Item model number: 24300
• Average Customer Review: 5.0 out of 5 stars  See all reviews (6 customer reviews)
• Amazon Best Sellers Rank: #3,236 in Automotive (See Top 100 in Automotive)
  • #5 in Automotive > Oils & Fluids > Sealers > Thread Lock
  • #29 in Automotive > Oils & Fluids > Body Repair & Restoration Chemicals > Adhesives

Product Description

Medium/high strength threadlocker for general-purpose applications. Especially well-suited for 1/4" to 3/4" fasteners that have a slight oil film.

Customer Reviews

Most Helpful Customer Reviews

15 of 15 people found the following review helpful:

5.0 out of 5 stars Worked for my bicycle's loose crankarm, August 25, 2008

By 

Joe MacBu - See all my reviews
(TOP 1000 REVIEWER)   

Amazon Verified Purchase

This review is from: Permatex 24300 Blue Surface Insensitive Threadlocker - 0.34 oz. (Automotive)

EDIT (March 2010): It's still holding tight after 1.5 years!

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Brief summary: It's been working great for over 3 months on my bike.

Longer version:

The left crankarm on my 20+ year old bicycle was coming loose every month or so. The local bike shop said that there was nothing I could do short of tightening it and that the problem would get worse until I replaced the crankarm (a >$100 fix and lots of fun trying to locate an overpriced unused vintage part on auction sites).

I researched the problem online and came across a few mentions of people using Loctite threadlocker to fix the problem. I decided to get the Loctite 243 since it is resistant to grease. Unfortunately, the local shops only carried Loctite 242 (not oil resistant). Amazon carries Loctite 243, but it is through a third party vendor which charges as much as the item costs for shipping. Fortunately, I came across this Permatex threadlocker, which is also grease resistant (#24300) and is offered with free shipping. My impression is that this is the same exact product as the Loctite 243, but rebranded.

Over 3 months ago, I removed my crankarm and wiped the gunk off both the male and female threads. I applied Permatex to the male threads and screwed the crankarm back in. I let it sit undisturbed for 2 days to allow the stuff to fully cure. I have been riding my bike almost everyday since then (about 1000 total miles), but the crankarm has not come loose.

I'm so impressed by this product that I decided to use it on other screws that would periodically come loose (like on my rear rack). Everything has stayed in place.

If you're unfamiliar with these thread locking compounds, be aware that there are several versions of the Permatex and Loctite. The blue stuff is of medium strength; one should be able to break the seal using the force from hand tools. There's a regular and an oil-resistant version of the blue stuff (best to go with the oil-resistant if you have a choice). If you need something stronger, there's a red version. You'll need to heat that stuff with a blow torch to break the seal. A low strength purple version is also available.

3 of 3 people found the following review helpful:

5.0 out of 5 stars Threadlock a must for loose screws !, May 29, 2009

By 

saxman "jetsax12" (North Haledon, NJ United States) - See all my reviews

Amazon Verified Purchase

This review is from: Permatex 24300 Blue Surface Insensitive Threadlocker - 0.34 oz. (Automotive)

Have a loose screw?

A small amount of threadlocker on the threads will act like glue around them holding the screw in place. It lasts too. You can break it open by turning the screw with a screwdriver.

Great stuff!!

2 of 2 people found the following review helpful:

5.0 out of 5 stars Better than Loctite, December 29, 2010

By 

Practical Desk (Connecticut) - See all my reviews

Amazon Verified Purchase

This review is from: Permatex 24300 Blue Surface Insensitive Threadlocker - 0.34 oz. (Automotive)

I used Permatex Threadlocker Blue and found it much easier to control, more viscous, than Loctite's product. It is more resistant to 'running' off of whatever substrate you apply it. I've used it on tiny screws to larger bolts. It works flawlessly. The higher viscosity makes it like working with a gel. I will buy more of this product. Also, the bottle makes applying the product much easier when compared with the small tubes. Excellent threadlocker that works and can be undone with a left turn of the screw head or bolt. Permatex Threadlocker Blue is an exceptional product.