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LOCTITE 243 Threadlocker for Automotive: Medium-Strength, Oil Tolerant, High-Temperature, Anaerobic, General Purpose | Blue, 36 ml Red Bottle (PN: 1330906)

LOCTITE 243 Threadlocker for Automotive: Medium-Strength, Oil Tolerant, High-Temperature, Anaerobic, General Purpose | Blue, 36 ml Red Bottle (PN: 1330906)

Q: is there a loctite that resists gasoline ?

Most of our Loctite anaerobic sealants and threadlockers will resist gasoline once they're fully cured. The right product will depend on your application requirements. Please call 1-800-LOCTITE (562-8483) to receive a product recommendation from one of our engineers.

Q: How do I open the Loctite 243 bottle?

You simply twist the cap and it should open.

Q: Is this good to use on battery cable bolts?

Yes this can be used on the threads. Loctite 243 is a plastic so keep it off the post where good electrically conductive contact is required. I am thinking a car battery here. If this is a different design and IF THIS THREADED ASSEMBLY REQUIRES ELECTRICALLY CONDUCTIVY DO NO USE OUR PLASTIC THREADLOCKER IT WILL INSULATE AND GENERATE RESISTANCE.

Q: Can this still be effective on a bolt that is threaded, left to sit, and then threaded again to torque spec?

Left for set how long? When you remove the bolt, if it's still wet then yes, but I would wipe it off and reapply because I would want a thicker application for a tighter bond.

Product ID: 255729199

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Details

Brand
LOCTITE
Specific uses for product
Repair
Material
Aluminum Steel
Item form
Liquid
Special features
Oil Tolerant

🔥High-temperature resistance up to engine standards

🔧Medium-strength hold for reliable fastening

🛢️Oil tolerant for tough automotive environments

Frequently Bought Together

LOCTITE 243 Automotive Threadlocker Blue - Medium Strength Thread Lock, General Purpose, Oil Tolerant - 36 ml, 1 Pack

Loctite 271 Automotive Threadlocker Red - High Strength Thread Lock, Fluorescent, Heavy-Duty, Works on All Metals - 36 ml, 1 Pack

Loctite 272 Automotive Threadlocker Red – High Temp Thread Lock, Heavy-Duty High Strength Applications, Works on All Metals - 36 ml, 1 Pack

Description

🔩 Lock it down like a pro—don’t let your bolts betray you!

QUICK SET LONG LASTING HOLD - Cures in just 10 minutes and fully sets in 24 hours to keep your projects moving fast.
VERSATILE FIT FOR EVERY BOLT - Ideal for nuts and bolts from 6 mm to 20 mm across multiple engine and chassis applications.
MAINTENANCE FRIENDLY REMOVABILITY - Medium strength allows easy disassembly with hand tools—perfect for ongoing vehicle care.
TRUSTED BY PROS SPECIFIED BY OE MS - Engineered and lab-tested to meet automotive manufacturer standards for ultimate reliability.
WORKS ON ALL METALS EVEN SLICK SURFACES - Superior adhesion on stainless steel, aluminum, and plated parts—no slip, no fail.

LOCTITE 243 is a medium-strength, oil-tolerant threadlocker designed for automotive use. Trusted by OEMs and professionals alike, it bonds securely to all metals including passive substrates, withstands high temperatures, and cures quickly for efficient repairs. Its removable formula balances durability with serviceability, making it the go-to solution for fastening bolts from 6 to 20 mm in critical engine and chassis components.

Specifications

Manufacturer	Loctite
Brand	LOCTITE
Model	Loctite 1330906 Threadlocker 243 Surface Insensitive-Medium Strength Bottle, Blue, 36-ml
Product Dimensions	20.32 x 9.68 x 3.18 cm; 81.65 g
Item model number	1330906
Exterior	Packaging
Manufacturer Part Number	1330906
OEM Part Number	1330906
Special Features	Oil Tolerant, High-Temperature, General Purpose
Item Weight	81.6 g
Viscosity	Medium

Have a Question? See What Others Asked

is there a loctite that resists gasoline ?

How do I open the Loctite 243 bottle?

Is this good to use on battery cable bolts?

Can this still be effective on a bolt that is threaded, left to sit, and then threaded again to torque spec?

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