Unfortunately, the original Loctite 242 does need primer, and I suggest upgrading to Loctite 243, which is a medium strength nut locker, which prevents fasteners when properly-torqued from loosening from vibration but allows hand tool disassembly. 243 Primerless will adhere to inactive metals without the need for a primer.
Full Answer
Do you need primer for Loctite?
When should a Primer be used with LOCTITE thread sealants? It is highly recommended to use Primers 7649 or 7471 with inactive thread surfaces like stainless steel, aluminium, plated surfaces etc., to ensure complete seal. Also, use of Primers is recommended in case you need faster curing.
Does Loctite 243 need primer?
Loctite 243 is a medium-strength nutlocker which prevents properly-torqued fasteners from loosening due to vibration, yet allows disassembly with hand tools. But unlike the original 242 formula, 243 Primerless will adhere to inactive metals without the need for primer.
How do you use Loctite Blue 242?
One of the major benefits of LOCTITE ® threadlockers is that they're relatively simple to use once you know how....How to Use LOCTITE® ThreadlockersPrepare the Surface. ... Allow the Threads to Dry. ... Apply a Few Dots of Threadlocker. ... Attach the Nut to the Bolt. ... Cure in Place.
What is the purpose of Loctite primer?
LOCTITE primers are used for improving adhesion to substrates. They are applied before the adhesive. For low surface energy plastic substrates, e.g. polyolefin, PP, PE, best adhesion will be achieved with LOCTITE 770 / 7701. LOCTITE activators are used to increase cure speed.
What is the difference between 243 and 242 Loctite?
Loctite 243 comes with significantly improved oil tolerance. Even if your threads are a little dirty and oily, it's not a big deal. No need to use any primers on plated fasteners either. If you work with a tube of Loctite 242 you will have to clean all threads properly if you want the Threadlocker to work at all.
Is Loctite 242 and 243 the same?
The Similarities Between Loctite 242 and 243. Both thread lockers share several properties, which is to be expected. After all, Loctite 243 is an upgrade of Loctite 242. Here's what they both share.
Do you have to let Loctite dry?
Loctite cyanoacrylate adhesive will dry and set in a few seconds after application. The glue will achieve full bond strength in 10 minutes. The curing process will be complete in 24 hours.
Can you use too much Loctite?
Threadlockers are designed to fill small gaps in threads, so a little adhesive actually goes a very long way. Overuse may cause the adhesive to spread beyond the required surfaces. Any threadlocker outside of the curing area, where air is still present, will remain liquid and not cure.
Is Loctite 242 removable?
LOCTITE® 242® Medium Strength Mil-Spec Blue Threadlocker is a general purpose, removable threadlocker for fasteners between 1/4" and 3/4" (6 to 20 mm) diameters. Controlled lubricity for accurate clamp loads. Parts can be separated using hand tools.
How long does Loctite 242 take to dry?
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.
How do you apply Loctite primer?
Clean parts of contamination. If necessary, spray LOCTITE® SF 7649™ Primer onto threaded parts (male and female). ... Apply a band of LOCTITE® Thread Sealant to male threads starting one to two threads from end of pipe. Assemble parts snugly. ... If initial pressure exceeds 1000 psi*, wait 30 minutes before pressurizing.
How do you clean before using Loctite?
I use 99 percent isopropyl alcohol. I usually soak the screws in it for a few minutes, then wipe the screws dry with a cloth or clean heavy-duty paper towel. This alcohol dries very quickly. I wouldn't trust using 243 loctite without cleaning first.
How long does Loctite 243 take to dry?
Sets in approximately 10 minutes and fully cures in 24 hours. Clean adhesive residue immediately with a damp cloth. Cured product can be removed with a combination of soaking in methylene chloride and mechanical abrasion such as a wire brush.
How do you clean before using Loctite?
I use 99 percent isopropyl alcohol. I usually soak the screws in it for a few minutes, then wipe the screws dry with a cloth or clean heavy-duty paper towel. This alcohol dries very quickly. I wouldn't trust using 243 loctite without cleaning first.
How long does Loctite need to set up?
How long does Loctite super glue take to dry? Loctite cyanoacrylate adhesive will dry and set in a few seconds after application. The glue will achieve full bond strength in 10 minutes. The curing process will be complete in 24 hours.
Can you pre Apply Loctite?
Convenient, durable package is a must for every toolbox. Loctite® QuickTape™ 249™ is easy to apply and can be preapplied for future assembly.
What is a loctite threadlocker?
Loctite Threadlocker Blue 242 is designed for the locking and sealing of threaded fasteners which require normal disassembly with standard hand tools.
Is loctite threadlocker blue 242 available online?
Sorry, Loctite® Threadlocker Blue 242® is not available online in this size through any of our connected retailers. Try selecting another size. You can also contact us .
What is the difference between loctite 242 and loctite 243?
The difference between Loctite 242 and Loctite 243 is that Loctite 243 is an upgraded version of the popular Loctite 242. When using 243, you aren’t likely to notice any difference when applying Loctite 243, but where 243 shines over 242 is in its oil tolerance, which is improved over Loctite 242. As I said, you’re unlikely to notice ...
What is a Loctite 270?
Loctite 270 and 276 are what you need, and these are two high strength Threadlockers that fulfill those criteria.
How long does it take for red threadlocker to cure?
Red Threadlocker is the highest strength. It cures fully in 24 hours, So look for Loctite 270 or 276. These are so strong that you need heat to disassemble them.
What is the best loctite for thread locking?
Somethings that’s designed to be used in relatively high strength applications, then look no further than Loctite 272 , this is your best bet. It’s designed to be used for permanent thread locking, so you know that this is going to be a high strength product.
Why would you need a high strength threadlocker?
Why would you need a high strength Threadlocker? It’s essential to use a high strength Threadlocker when you are dealing with bolts that are going to vibrate a lot, as vibration tends to undo bolts.
Can you use loctite 242 with oil?
You will need to take the time to remove any remaining oil before applying Loctite 242. However, Loctite has an upgraded version of 242, Loctite 243, which has oil tolerance so that you can use it, even with oil present.
Does loctite 242 need primer?
Unfortunately, the original Loctite 242 does need primer, and I suggest upgrading to Loctite 243, which is a medium strength nut locker, which prevents fasteners when properly-torqued from loosening from vibration but allows hand tool disassembly. 243 Primerless will adhere to inactive metals without the need for a primer.
What is a loctite threadlocker?
Threadlocker is a chemical liquid that helps to secure nuts and bolts against self-loosening due to vibrations. LOCTITE Threadlockers work on anaerobic technology that hardens in the absence of air and presence of metal ions. So, when LOCTITE threadlockers are used on bolt and the nut is tightened, the liquid spread covering all ...
How long does it take to cure a loctite threadlocker?
Yes, heat can help achieve faster cure. Typically one can heat cure LOCTITE threadlockers at 125 degrees celsius for 1 hour, or go as low as 66 degrees celsius for 3 hours. The trade-off here is that there will be a reduction in strength to a certain extent.
How does threadlocker work?
Threadlocker is applied on the threads of the nut and bolt and then it is bonded together. The liquid adhesive spreads evenly between the nut and bolt and then hardens into a thermoset plastic in the absence of air and presence of metal ions, locking the nut and bolt together and that is how LOCTITE threadlocker works.
Is loctite thread sealant thixotropic?
LOCTITE thread sealants are thixotropic in nature and hence will not flow to other areas. Also, LOCTITE thread sealants come with a nozzle for precise application on the joint engagement area. Hence, there is no scope for a mess.
Can loctite be used on nut bolts?
Also, LOCTITE threadlockers only need to be applied on the nut-bolt interface and once the nut covers the area where LOCTITE threadlocker was applied, the adhesive will get cured in the absence of air and presence of metal, thereby turning into a thermoplastic, which cannot flow.
Can you use loctite as a shim?
Yes, in case the product design specifies the use of pre-cut gasket as a shim , LOCTITE Anaerobic Gasket Dressing can be used in conjugation with the pre-cut gasket. Just clean the flange surfaces and apply LOCTITE Anaerobic Gasket Dressing to both the sides of a fresh pre-cut gasket.
