If i apply this product on brake bracket-to-steering knuckle bolts will i be able to loosen those bolts just w/huge breaker bar, without heat?

Sorry, I meant to type primer SF 7649 or SF 7471. Loctite 277 is a high strength threadlocker that requires primer SF 7649 or 7411 when it's applied on 2 plated metals, 2 low energy surfaces, or 2 non-active metal surfaces. If one of the parts is active, the primer is not required. After the product cures, applying head and removing while the assembly is still hot, is the best/safest way to disassemble without stripping the threads. You could try removing with a hand tool first, but the resistance is too much, heat the head of the screw to 450F to disassemble.

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Loctite 38656 277 Red Large Threads Threadlocker Bottle - 36 ml

Loctite 38656 277 Red Large Threads Threadlocker Bottle - 36 ml

Product ID: 11460250

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Details

Brand
Loctite
Specific Uses For Product
Fleet and
Material
Aluminum Steel
Item Form
Liquid
Special Feature

⏳Full cure in 24 hrs

🔥Heat-activated disassembly

🔩Locks bolts ≥1 inch

Description

🔧 Lock it down like a pro — don’t let your bolts bail on you!

CONTROLLED DISASSEMBLY - Heat activation allows easy removal when needed, balancing permanent hold with serviceability.
OEM APPROVED RELIABILITY - Trusted by automotive manufacturers and factory assembly lines for consistent, professional-grade performance.
VIBRATION PROOF SECURITY - Prevents loosening from shocks and vibrations—ideal for suspension, wheel studs, and heavy-duty fasteners.
INDUSTRIAL GRADE STRENGTH - Engineered for large bolts and studs 1 inch (25 mm) or bigger, ensuring maximum hold where it counts.
VERSATILE METAL COMPATIBILITY - Works seamlessly on stainless steel, aluminum, and plated surfaces with superior oil tolerance.

Loctite 38656 277 Red Threadlocker is a high-strength adhesive designed for large automotive bolts and studs (≥1 inch). OEM-specified and trusted on factory lines, it bonds metals like stainless steel and aluminum with superior oil tolerance. It cures fully in 24 hours, resists vibration loosening, and requires heat for disassembly, making it the go-to solution for securing heavy-duty fasteners in demanding environments.

Specifications

Brand	Loctite
Specific Uses For Product	Fleet and plant maintenance.
Material	Aluminum,Stainless Steel
Item Form	Liquid
Special Feature	Not_Performance_Used
Color	Red
Item Package Quantity	1
Package Information	Bottle
Item Volume	36 Milliliters
Viscosity	7000 centipoise
Full Cure Time	24 Hours
Water Resistance Level	Not Water Resistant
Unit Count	1.22 Fluid Ounces
Viscosity Level	Medium to High
UPC	079340386563
Global Trade Identification Number	00079340386563
Manufacturer	Loctite
Model	Loctite 555353 Threadlocker 277 High Strength Bottle, Red, 36-ml
Item Weight	2.4 ounces
Product Dimensions	6.25 x 2.25 x 1.1 inches
Item model number	38656
Manufacturer Part Number	555353
OEM Part Number	38656
Special Features	Not_Performance_Used

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