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Loctite 37643 Blue Medium Strength Threadlocker Stick, 9-Gram

Loctite 37643 Blue Medium Strength Threadlocker Stick, 9-Gram

Q: Does the stick ever dry out? What is the longest you have had it open and it still works as expected for you?

Loctite Rep said the "stick" shelf life from date of manufacture is 4 years. Rep said Manufacture date is 2nd and 3rd series of numbers/ letters in the batch number. Example Batch Number example L3 7 B AC569. Number 7 will indicate last number of the year No clarification was given if 2017 would be 7 or 17. And and letter B will indicate month, B = February.

Q: INeed to remove the bolt, can you do it with tools? Liquid says yes, reviewers say stick is permanent. Can't be permanent for my purpose .

loctite says: Threadlocker Blue 242® is great for Securing nuts and bolts from accidental loosening. Removes with hand tools.I say: It depends. Size of the locking area, strength and condition of the fastener. Now on a typical 5/16'' nut and bolt is a very small locking area so Blue is totally removeable as long as it's clean with no rust or burrs. Got dirt, rust, wire brush em unless their too far gone. Chase the threads on burrs. If you don't and it's a cheap grade fastener... It's gonna break and may ruin your day. Remember, this stuff turns into a crystalline structure under pressure. Sticks to everything including dirt and rust. So the impregnated rust, dirt and burrs are bigger now which causes binding upon removal. The LOCTITE 290 Wicking Grade Green is kool stuff. Apply after assembly and doesn't take much. Almost as strong as Blue, easy removal qualities and costs more. So don't spill it. Threadlocker Red 271 is for grade 8 fasteners or better. Hope this helped.

Q: Has anyone used this with macbook screws? i'm hoping it provides similar holding power to oem screws, mine have been wiggling out a lot over time.

Yes. I use this on all of my computer screws, including an older MacBook. I'm not aware of anything special about MacBook screws, or oem screws, that would make them less suitable. This is a mechanical bond, so the more threads that engage, and the finer the gap of the engagement, the better it works.

Q: Is there a max temperature for storage? Basically will it melt in my Florida garage?

Optimal storage is 8 °C to 21 °C. Storage below 8 °C or greater than 28 °C can adversely affect product properties. Here is the TDS: http://tds.henkel.com/tds5/Studio/ShowPDF?pid=248&format=MTR&subformat=REAC&language=EN&plant=WERCS

Product ID: 227312021

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Details

Brand
Loctite
Specific Uses For Product
water
Material
Resin
Item Form
Stick
Special Feature
removable

🔒Medium strength lock

🔧Removable with hand tools

🖊️Self-feeding stick applicator

Description

🔧 Lock it down, lift it up—threadlocking made effortless!

INNOVATIVE WAX LIKE STICK - Mess-free, self-feeding applicator designed for precision and ease, even in hard-to-reach spots.
TOOL REMOVABLE CONVENIENCE - Strong yet reversible; disassemble with standard hand tools, avoiding damage or frustration.
VERSATILE APPLICATION RANGE - Perfect for valve covers, water pumps, oil pans, drive shafts, and more—engineered for professional repairs.
RELIABLE MEDIUM STRENGTH LOCK - Secures bolts with trusted blue threadlocker power for lasting hold without overkill.
OVERHEAD DELAYED ASSEMBLY FRIENDLY - Apply now, assemble later—ideal for complex or volume assembly workflows without losing grip.

Loctite 37643 Blue Medium Strength Threadlocker Stick delivers dependable locking and sealing with a convenient wax-like stick applicator. Designed for professional-grade repairs on critical engine components, it offers medium strength hold that’s removable with hand tools, perfect for overhead or delayed assembly tasks.

Specifications

Brand	Loctite
Specific Uses For Product	water
Material	Resin
Item Form	Stick
Special Feature	removable
Colour	Blue
Item Package Quantity	1
Package Information	Stick
Item Volume	9 Cubic Centimetres
UPC	079340376434
Global Trade Identification Number	00079340376434
Manufacturer	Loctite
Model	37643
Product Dimensions	8.89 x 1.91 x 1.91 cm; 27.22 g
Item model number	37643
Exterior	Smooth
Manufacturer Part Number	506166
OEM Part Number	37643
Size	medium
Stain Resistant?	Yes
Assembly Required	No
Special Features	removable
Item Weight	27.2 g

Have a Question? See What Others Asked

Does the stick ever dry out? What is the longest you have had it open and it still works as expected for you?

INeed to remove the bolt, can you do it with tools? Liquid says yes, reviewers say stick is permanent. Can't be permanent for my purpose .

Has anyone used this with macbook screws? i'm hoping it provides similar holding power to oem screws, mine have been wiggling out a lot over time.

Is there a max temperature for storage? Basically will it melt in my Florida garage?

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