is loctite 577 or 567 better for engine coolant fittings on an automobile engine to prevent leaking?

I have only used the 577 on a boiler heating system which contained a 50% solution of antifreeze. So far it has been the only product that worked. The 567 is similar to 577 but the 577 is better for coarse threads.

If possible, can you please provide me the manufacturing date and the expiration date of this product? I need Loctite 577 that has longer shelf life.

This item has a shelf life of 2 years. Each item will have a manufacture batch code and you would need to contact Loctite directly in order to find out when it was manufactured.

ASIN	B00B748HPS
Best Sellers Rank	#55,080 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #820 in Universal Adhesives
Brand	Loctite
Brand Name	Loctite
Colour	Yellow
Compatible Material	Metal
Customer Reviews	3.9 out of 5 stars 49 Reviews
Global Trade Identification Number	00079340214569
Included Components	Loctite 577 Thread Sealant: 1
Item Form	Liquid
Item Type Name	Adhesive
Item Weight	82 g
Manufacturer	D3/D4, MIDC Industrial Estate, Jejuri, Purandhar, Pune, Maharashtra - 412303., Loctite
Manufacturer Contact Information	D3/D4, MIDC Industrial Estate, Jejuri, Purandhar, Pune, Maharashtra - 412303.
Material	Adhesive
Material Type	Adhesive
Packer Contact Information	D3/D4, MIDC Industrial Estate, Jejuri, Purandhar, Pune, Maharashtra - 412303.
Style	Compact
Style Name	Compact
Supported Standards	NSF, DVGW
Surface Recommendation	Metal
UPC	079340214569
Unit Count	1 Count
Water Resistance Level	Water Resistant

Loctite 577 Thread Sealant | For Metal pipes with Coarse Threads (thread size upto 3") | 50 ml

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