SKU: 12516073873

Cortec M-640L - Anti Rust Additive for Engine Coolants - 5 Gal Pail

Sale price$194.85 Regular price$216.50
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Ships within 48 hours · Estimated delivery Aug 20 - Aug 25

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Description

Cortec M-640L - Anti Rust Additive for Engine Coolants - 5 Gal PailKey Features: Corrosion inhibiting additive for heat exchange fluids and coolants. Can be added to water and glycol based closed loop systems up to 302F. Contains contact and vapor phase corrosion inhibitors. Protects ferrous and non ferrous metals from corrosion and pitting. Use in low dosages. Cortec's M 640 L is a liquid corrosion inhibiting additive for water and glycol based heat exchange fluids. It protects ferrous and non ferrous metals from

Key Features:

  • Corrosion inhibiting additive for heat exchange fluids and coolants.
  • Can be added to water and glycol-based closed-loop systems up to 302ºF.
  • Contains contact and vapor phase corrosion inhibitors.
  • Protects ferrous and non-ferrous metals from corrosion and pitting.
  • Use in low dosages.

Cortec®'s M-640 L is a liquid corrosion inhibiting additive for water and glycol-based heat exchange fluids. It protects ferrous and non-ferrous metals from corrosive contaminants. This product is an excellent replacement for silicates and phosphate/nitrite-based amine compounds. M-640 L is based on an organic-inorganic formulation designed for low level concentrations in field applications. M-640 L contains a unique combination of contact and vapor phase corrosion inhibitors that provide corrosion protection even in partially filled spaces. M-640 L is nitrite, chromate, silicate and heavy metal free.

Packaging:
Available in 5 gallon (19 liter) pails. Contact Us to get a quote for this product in drums.

Dosage:
The final concentration range for M-640 L under operating conditions is 2.0-2.5% by weight.

Typical Applications:
Use M-640 L as an additive to antifreeze and coolant fluids to replace nitrites, phosphates, amines and other types of restricted corrosion inhibitors. Can be used on closed loops during operation or layup. Metals protected include copper, brass, carbon steel, cast iron and aluminum.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 12516073873

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Chad altenbach
Fort Morgan, US
★★★★★ 5
Made well and great fit
Fits perfectly and is made well
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Reviewed in the United States on May 8, 2026
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Dalia Toppin
Natrona Heights, US
★★★★★ 5
Make sure you know the size
Yes worked like a charm
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Reviewed in the United States on April 5, 2026
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Michael Jozefczak
Cuba, US
★★★★★ 5
Great fitment, made changing the oil filter easy
Perfect fit for my m760i oil filter housing.
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Reviewed in the United States on April 24, 2026
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Benjamin Tua
Grantham, US
★★★★★ 5
s tier quality
superior quality, single cast aluminum 👍
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Reviewed in the United States on May 2, 2026
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Mr. Jibby
Lake Worth, US
★★★★★ 4
Too Tight but It Works
It doesn't really sit on very well to be honest, it tends to sit TOO tight in my opinion. Taking it off can be a hassle but at least it gets the job done, durability is good, finish is great, obviously easy to use.
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Reviewed in the United States on April 28, 2025

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