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0.20 oz Loctite 209728 Loctite Threadlocker Blue 242

4.8 4.8 out of 5 stars 37,488 ratings
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Amazon's Choice in Thread Lock Sealers by Loctite
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List Price: $22.10

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0.2 Fl. Oz (Pack of 1)
Threadlocker
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Purchase options and add-ons

Brand Loctite
Specific Uses For Product Threadlocker
Material Thread Sealant
Compatible Material Metal
Item Form Gel

About this item

  • Protects threads
  • Medium strength
  • Locks threads
  • Prevents rusting of threads
  • Can be removed with hand tools

Frequently bought together

0.20 oz Loctite 209728 Loctite Threadlocker Blue 242
$7.79 ($38.95/Fl Oz)
Get it as soon as Saturday, May 18
In Stock
Sold by Sunshine Wholesales and ships from Amazon Fulfillment.
+
Loctite Threadlocker Red 271 - Permanent Thread Lock Glue for Nuts, Bolts, & Fasteners, High Strength Screw Glue to Prevent L
$7.70 ($38.50/Fl Oz)
Get it as soon as Saturday, May 18
In Stock
Sold by Sunshine Wholesales and ships from Amazon Fulfillment.
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Product details

  • Is Discontinued By Manufacturer ‏ : ‎ No
  • Product Dimensions ‏ : ‎ 4.8 x 3.4 x 0.5 inches; 0.18 ounces
  • Item model number ‏ : ‎ 209728
  • Department ‏ : ‎ Unisex-Adult
  • Date First Available ‏ : ‎ January 16, 2007
  • Manufacturer ‏ : ‎ Henkel
  • ASIN ‏ : ‎ B000I1RSNS
  • Customer Reviews:
    4.8 4.8 out of 5 stars 37,488 ratings

Product Description

Product Description

Loctite Threadlocker Blue 242 is designed to lock and seal threaded fasteners and prevent loosening from vibration. Ideal for 6-19mm fasteners, this unique formula is great for small motors, mowers, and power equipment. Loctite Threadlocker Blue 242 protects threads and prevents from leaks, rusting, and corrosion and eliminates the need to stock up on expensive lock nuts and washers. Fast and easy to use, this medium-strength threadlocker sets in just 10 minutes and fully cures in 24 hours. Loctite Threadlocker Blue 242 is particularly suited for applications on less active substrates such as stainless steel and plated surfaces, where disassembly is required for servicing.

From the Manufacturer

Loctite Threadlocker Blue 242 locks threaded metal fasteners against loosening from machine vibration. It prevents leaks and rusting of metal threads for 1/4- to 3/4-Inch (6 mm to 20 mm) nuts and bolts. Metal parts can be removed with hand tools for easy disassembly if necessary. Sets in 20 minutes and cures in 24 hours. Especially useful for small motors, mowers and many types of power equipment.

From the manufacturer

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Threadlocker Blue Threadlocker Red
Customer Reviews
4.8 out of 5 stars
37,488
4.8 out of 5 stars
10,406
Price $7.79 $7.70
Size 6 ml 6 ml
Color Blue Red
Fastner size 1/4" - 3/4" Up to 1"
Torque (lbs./in.) break/prevail 110/43 250/275
Temperature range -65°F (-54°C) to 300°F (149°C) -65°F (-54°C) to 300°F (149°C)
Removable With hand tools Only removable with heat to nut or stud for 5 minutes at 450°F and with hand tools
image

What's in the box

  • Thread Locking Adhesive

    • Product guides and documents

    Safety Information (PDF)

    Looking for specific info?

    Customer reviews

    4.8 out of 5 stars
    4.8 out of 5
    37,488 global ratings

    Customers say

    Customers like the value, ease of use, adhesion, and ease of removal of the bonding adhesive. For example, they mention it's a quality affordable product, it holds screws securely, and it comes off easily. Customers are also happy with quality. That said, some complain about the water resistance.

    AI-generated from the text of customer reviews

    1,151 customers mention1,032 positive119 negative

    Customers like the quality of the bonding adhesive. They say it works well, is dependable, and holds up well. Some mention that it holds like brazing metal together.

    "No joke this stuff holds like brazing metal together. I am impressed with how easy it is to use after appropriate surface prep...." Read more

    "...Fast delivery and worked great on my compensator threads." Read more

    "Arrived fast and in good condition." Read more

    "...I'll always by this brand. It's dependable." Read more

    289 customers mention263 positive26 negative

    Customers are satisfied with the adhesion of the bonding adhesive. They mention that it works well to secure screws and nuts in place. Some say that it is a medium-strength adhesive that holds on tight.

    "...blue is great for use on small screws on pocketknives as it holds screws securely but allows them to be removed should they need to be removed." Read more

    "...and obviously like I say it does what it says it will do it holds the stuff in place and does not allow it to come apart until you want to take it..." Read more

    "Holds threads tight and is easier that the red thread lockers without overheating the parts." Read more

    "I have used blue Loctite for over thirty years. It has always worked good to keep screws from coming out and items from falling apart...." Read more

    156 customers mention120 positive36 negative

    Customers like the value of the bonding adhesive. They say it's an inexpensive DIY product and a nice compromise.

    "Came overnight in original wrapping. Great price compared to local big box stores but the only way I can if this stuff is working is to take bolts..." Read more

    "...I have never had a bad experience using Loctite products. Good price." Read more

    "...very cost friendlyCons:- unexpectedly runny (quite low viscosity)-..." Read more

    "...I can recommend you buy this. My only complaint is how expensive it is now." Read more

    99 customers mention88 positive11 negative

    Customers find the bonding adhesive easy to use. They mention it goes on easy, holds tight, and breaks loose easily with proper tools. They also say it's convenient and easy to apply even for beginners. Some say it secures bolts and screws from loosening due to vibration. Overall, most are satisfied with the ease of use.

    "...I am impressed with how easy it is to use after appropriate surface prep. I little goes a long way. Easy to mix and use...." Read more

    "easy to use" Read more

    "Holds threads tight and is easier that the red thread lockers without overheating the parts." Read more

    "Easy to use and apply, haven't had to take it off yet. But seems to be holding well." Read more

    70 customers mention58 positive12 negative

    Customers like the ease of removal of the bonding adhesive. They say it's strong enough to hold but easy to remove when needed. Some mention that it takes a little effort to unfasten hardware. They also say it allows nuts to be intentionally removed.

    "...small screws on pocketknives as it holds screws securely but allows them to be removed should they need to be removed." Read more

    "...what it says it will do it holds the stuff in place and does not allow it to come apart until you want to take it apart which then you can" Read more

    "...Yet it breaks loose and is removable. You have to love this stuff." Read more

    "Good for using for folding knife torx screws. Comes off easily enough but also holds reasonably strong." Read more

    87 customers mention10 positive77 negative

    Customers are dissatisfied with the water resistance of the bonding adhesive. They mention that it is very watery, has very little viscosity, and is runny. Some say that the liquid is a lot looser than they thought.

    "...very cost friendlyCons:- unexpectedly runny (quite low viscosity)-..." Read more

    "...It is very watery! Amazed that it has worked this nicely." Read more

    "...I used this to secure them and worked well. Its a bit too watery and drips off easily so I had to be very gentle in applying it...." Read more

    "...He said that This works great, but the liquid is a lot looser than He thought...." Read more

    Right what I need
    5 Stars
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    Top reviews from the United States

    Kelly Davis
    5.0 out of 5 stars Quick set time and strong hold
    Reviewed in the United States on March 19, 2024
    Size: 0.2 Fl. Oz (Pack of 1)Style: ThreadlockerVerified Purchase
    No joke this stuff holds like brazing metal together. I am impressed with how easy it is to use after appropriate surface prep. I little goes a long way. Easy to mix and use. Clean up with rubbing alcohol made the repair look great.
    Helpful
     Report
    Byron T. Parks
    5.0 out of 5 stars Does it’s job!
    Reviewed in the United States on April 25, 2024
    Size: 0.2 Fl. Oz (Pack of 1)Style: ThreadlockerVerified Purchase
    Simple solution to keep screws from easily backing out, this is the one. Be sure to k ow the difference between blue and red for the correct application purpose. Fast delivery and worked great on my compensator threads.
    Helpful
     Report
    Amazon Customer
    5.0 out of 5 stars Arrived fast good condition
    Reviewed in the United States on May 8, 2024
    Size: 0.2 Fl. Oz (Pack of 1)Style: ThreadlockerVerified Purchase
    Arrived fast and in good condition.
    Helpful
     Report
    delump
    5.0 out of 5 stars Dependable
    Reviewed in the United States on April 21, 2024
    Size: 0.2 Fl. Oz (Pack of 1)Style: ThreadlockerVerified Purchase
    I think this is the original maker of thread locking stuff. Regardless, I depend on it and it's never failed. I'll always by this brand. It's dependable.
    Helpful
     Report
    Amazon Customer
    4.0 out of 5 stars Blue LocTight
    Reviewed in the United States on March 25, 2024
    Size: 0.2 Fl. Oz (Pack of 1)Style: ThreadlockerVerified Purchase
    It works pretty decent I guess. I used it on a motorized bicycle and I haven't run into any loose nuts or bolts. I went with the BT Electric Start 80cc witch is a smoother running engine than most others. I will say this, It's very easy to remove a bolt after curing for 24 hours. If you really want something to stick use the red.
    Helpful
     Report
    Jeff
    5.0 out of 5 stars Just right
    Reviewed in the United States on March 22, 2024
    Size: 0.2 Fl. Oz (Pack of 1)Style: ThreadlockerVerified Purchase
    Loctite blue is great for use on small screws on pocketknives as it holds screws securely but allows them to be removed should they need to be removed.
    One person found this helpful
    Helpful
     Report
    Mitch O
    5.0 out of 5 stars How can you tell if it’s working
    Reviewed in the United States on April 16, 2024
    Size: 0.2 Fl. Oz (Pack of 1)Style: ThreadlockerVerified Purchase
    Came overnight in original wrapping. Great price compared to local big box stores but the only way I can if this stuff is working is to take bolts apart. I’ll continue to use.
    Helpful
     Report
    Tim c
    5.0 out of 5 stars Thread lock
    Reviewed in the United States on April 27, 2024
    Size: 0.2 Fl. Oz (Pack of 1)Style: ThreadlockerVerified Purchase
    Great stuff. Works as it should.
    Helpful
     Report

    Top reviews from other countries

    Translate all reviews to English
    Greig Parry
    5.0 out of 5 stars Excellent Product
    Reviewed in Canada on December 8, 2023
    Size: 0.2 Fl. Oz (Pack of 1)Style: ThreadlockerVerified Purchase
    Excellent Product
    Report
    Amazon Customer
    5.0 out of 5 stars Excellent product
    Reviewed in India on April 12, 2024
    Size: 0.2 Fl. Oz (Pack of 1)Style: ThreadlockerVerified Purchase
    I basically purchase for key lock screw clutch bolt, clutch cover bolt, disk plate bolt etc. It's second safety from preventing nut and bolt opening or losing by itself.
    Customer image
    Amazon Customer
    5.0 out of 5 stars Excellent product
    Reviewed in India on April 12, 2024
    I basically purchase for key lock screw clutch bolt, clutch cover bolt, disk plate bolt etc. It's second safety from preventing nut and bolt opening or losing by itself.
    Images in this review
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    Report
    Amazon Customer
    5.0 out of 5 stars Fantastic
    Reviewed in the United Kingdom on March 14, 2024
    Size: 0.2 Fl. Oz (Pack of 1)Style: ThreadlockerVerified Purchase
    Everything works as described on the packet ,propt ; ontime .thankz .
    Report
    Leonidas Anagnostopoulos
    5.0 out of 5 stars Does the job
    Reviewed in Germany on August 19, 2023
    Size: 0.2 Fl. Oz (Pack of 1)Style: ThreadlockerVerified Purchase
    Shake before use.
    Report
    Monica Augusta Albreghs
    5.0 out of 5 stars Ottimo prodotto!
    Reviewed in Italy on February 8, 2020
    Size: 0.2 Fl. Oz (Pack of 1)Style: ThreadlockerVerified Purchase
    Tutto bene.
    Report