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🔧 Lock it down like a pro — don’t let your bolts bail on you!
LOCTITE 37421 Red Heavy Duty Threadlocker is a methacrylate-based adhesive designed for securing large bolts and studs (≥1 inch) in automotive and industrial settings. It bonds all metals, tolerates minor oil contamination, sets quickly in 10 minutes, and fully cures in 24 hours. Resistant to shock, vibration, chemicals, and temperatures up to 140°F, it ensures durable, professional-grade fastening with easy removal via localized heating.
| ASIN | B0028OJAIY |
| Brand | Loctite |
| Brand Name | Loctite |
| Colour | Red |
| Compatible Material | Aluminium |
| Container Type | Tube |
| Country of Publication | USA |
| Customer Reviews | 4.8 out of 5 stars 1,053 Reviews |
| Full Cure Time | 24 Hours |
| Global Trade Identification Number | 00079340374218 |
| Included Components | (1) LOCTITE 271 Threadlocker for Automotive | Red, 6 ml Tube |
| Item Form | Tube |
| Item Package Quantity | 1 |
| Item Type Name | Loctite 487232 Threadlocker 271 High Strength Tube, Red, 6-ml |
| Item Weight | 0.01 Pounds |
| Manufacturer | Loctite |
| Manufacturer Part Number | 37421 |
| Material | Methacrylate-based Resin |
| Material Type | Methacrylate-based Resin |
| Model | 37421 |
| Number of Pieces | 1 |
| Other Special Features of the Product | Strong |
| Special Feature | Strong |
| Specific Uses For Product | Automotive, Industrial, DIY, Furniture, Heavy-Duty |
| UPC | 079340374218 |
| Viscosity Level | Low |
| Volume | 6 Millilitres |
| Water Resistance Level | Water Repellent |
J**.
Buena compra
Rinde mucho y es un producto y marca que cumple lo que promete
N**S
Did the job perfectly
Replacing axle nuts on my ‘06 Corvette. Locked them on the shaft easily. As recommended, waited 24 hours for the thread lock to set properly.
S**S
Awesome product.
This works again as advertised, i used it to install my V6 muzzle brake on my KSG and it worked great, that thing has not flinched a millimeter from when i first set it and it's been there for months and hundreds of rounds mostly slugs or 00 buck shot out of it, i think i've shot about 6 shells of birdshot in my life and not with this shotgun. It just works for weapons applications just make sure what you're using it for you're not intending to remove regularly cuz i would assume it would suck for you then, use the blue loctite instead which i have for regular bolts and such.
A**M
Works
Love the lock and unlock tip and work good as well
C**P
good price for a good product
Use this product alot, best price on it here
Trustpilot
1 month ago
4 days ago