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.

Loctite 277 | Desertcart UK

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Description

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

CONTROLLED DISASSEMBLY - Requires heat to weaken bond, giving you secure fastening with the option for future maintenance.
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 mounts.
INDUSTRIAL GRADE STRENGTH - Engineered for large bolts and studs 1 inch (25 mm) or larger, ensuring maximum hold where it counts.
MULTI METAL COMPATIBILITY - Works seamlessly on stainless steel, aluminum, and plated surfaces with superior oil tolerance for extreme conditions.

Loctite 38656 277 Red Threadlocker is a high-strength adhesive designed for large automotive bolts and studs (≥1 inch). OEM-specified and trusted for factory assembly, it cures fully in 24 hours, resists vibration loosening, and works on all metals including stainless steel and aluminum. Heat is needed for disassembly, making it perfect for heavy-duty, long-lasting fastening in demanding environments.

Specifications

ASIN	B0002KKTTK
Best Sellers Rank	#88,328 in Automotive ( See Top 100 in Automotive ) #89 in Thread Lock Sealers
Brand Name	Loctite
Color	Red
Compatible Material	All Metals
Container Type	Bottle
Customer Reviews	4.7 4.7 out of 5 stars (107)
Full Cure Time	24 Hours
Global Trade Identification Number	00079340386563
Included Components	(1) LOCTITE 277 Threadlocker \| Red, 36 ml Bottle
Item Form	Liquid
Item Package Quantity	1
Item Type Name	automotive-thread-lock-sealers
Item Weight	2.4 ounces
Manufacturer	Loctite
Material Type	Aluminum,Stainless Steel
Model	38656
Number of Pieces	1
Other Special Features of the Product	Not_Performance_Used
Part Number	555353
Specific Uses For Product	Fleet and plant maintenance.
UPC	079340386563
Unit Count	1.22 Fluid Ounces
Viscosity Level	Medium to High
Volume	36 Milliliters
Water Resistance Level	Not Water Resistant

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Loctite 277

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