

🔧 Lock it down like a pro — don’t let your bolts bail on you!
LOCTITE 37421 Red Heavy Duty Threadlocker is a professional-grade adhesive designed for securing large bolts and studs (≥1 inch) in automotive and industrial applications. It bonds to all metals, tolerates minor oil contamination, sets quickly in 10 minutes, and fully cures in 24 hours. Engineered to withstand heavy shock, vibration, and temperatures up to 140°F, it ensures long-lasting, reliable performance with easy disassembly via heat and hand tools.




| Brand | Loctite |
| Specific Uses For Product | Automotive, Industrial, DIY, Furniture, Heavy-Duty |
| Material | Metal-based formulation |
| Item Form | Tube |
| Special Feature | Strong |
| Color | Red |
| Item Package Quantity | 1 |
| Package Information | Tube |
| Item Volume | 6 Milliliters |
| Viscosity | Low viscosity |
| Full Cure Time | 24 Hours |
| Water Resistance Level | Water Repellent |
| Viscosity Level | Low |
| UPC | 079340374218 |
| Number of Pieces | 1 |
| Global Trade Identification Number | 00079340374218 |
| Manufacturer | Loctite |
| Model | LOCTITE 271 Threadlocker for Automotive | Red, 6 ml Tube |
| Item Weight | 0.16 ounces |
| Product Dimensions | 6.5 x 3.81 x 0.8 inches |
| Item model number | 37421 |
| Is Discontinued By Manufacturer | No |
| Exterior | Packaged |
| Manufacturer Part Number | 37421 |
| OEM Part Number | 37421 |
| Special Features | Strong |
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