Parallax Technology, Inc.

Fluorinert™ Electronic liquids

Some CO2 lasers use 3M™ Fluorinert™ Electronic liquid as coolant.
The 3M Electronic liquids offered in this page are provided as a service to our CO2 laser customers.

This page is current as of : July 1, 2021

Electronic liquid FC-770 and FC-40: Coolant for lasers

-- For FC-770 and FC-40 PRICES please see table below or inquire at contact us. We maintain a reasonable quantity on hand for your immediate needs.

-- Fluorinerts are inert coolants for various electronic and high voltage applications. See table of properties.
-- If interested, you can see a lot more here : 3M Fluorinert™ and Novec™ Engineered Fluids. .

For your convenience we have given some descriptions below. However if you know what you need and just want to buy Fluorinert, here are FC-770 and FC-40 PRICES.

*** Very Important ***
Some web sites are selling these fluids at low prices. Two points to consider before purchase:
- 1: Fluorinert have Shelf Life, watch out for it.
- 2: Some are 'used fluid' that 'large users' must dispose of properly but it finds its way to the Internet. 'Used Fluorinert' is NOT to be used in Laser tubes or any other application that needs these fluids because of their unique properties.
Low prices are ok but KNOW what you are buying because you don't want to destroy the equipment.

-- Physical Properties of FC-770 and FC-40. Please also see Notes.

-- Material Safety Data Sheet : FC-770 SDS, FC-40 SDS.

Most of you are familiar with the coolant in your lasers --3M FC-40 or FC-770. For those of you who are not familiar with it, this is the short version description or you can go directly to Fluorinert prices .

Some medical laser system manufacturers like Sharplan, Lumenis, Deka, SmartXide Dot etc. recommend 3M Fluorinert FC-770, a specialty fluid from 3M™, as coolant for their laser tubes. It is a colorless, odorless liquid (just like water) and if you get some of it on your fingers, it is harmless (just wash your hands with water).

Here is the description from 3M web site:

- Heat Transfer Fluids :
The wide liquid range of Fluorinert™ liquid FC-770 (-127°C to 95°C) make it ideal for use in Automated Test Equipment (ATE) and other semiconductor process equipment. Its high dielectric strength means it will not damage electronic equipment or semiconductor wafers, chips or packages in the event of a leak or other failure. In addition, FC40 and FC770 liquid are chemically stable, nonflammable and non-toxic.

When you remove for service and re-install a medical laser tube, some of the FC-770 fluid gets spilled and is lost. Most of you need 'a little' to fill the laser tube or 'top off' the reservoir, sometimes less than 'a cup full'.

Since 3M supplies Fluorinert liquids in 5 Kg ( and larger) containers, you need to figure out :
How much Fluorinert do I need ?

Either of Fluorinert™ FC-40 or FC-770 are about 2 times heavier than water. Here are some rough calculations for figuring how much FC-40 / FC-770 liquid you need to purchase to fill your laser tube / system:

1000 cc of water = 1 kg = 2.2 lbs.

1000 cc FC-770 ~ 2 kg = 4.4 lbs
 500 cc FC-770 ~ 1 kg = 2.2 lbs
 250 cc FC-770 ~ 1/2 kg ~ 1 lbs
A Cup is 8 Oz = 237 cc. A can of Coke is 355 cc (12 Oz).

A Deka 30 Watt tube, just the glass tube by itself, takes 100 cc
Sharplan 20C, 30C and 40C tubes, just the glass tube by itself, take 100 cc
If system reservoir is also emptly, count on 500 cc total but you will have some leftover Fluorinert.

You can purchase 3M Fluorinert FC-770 or FC-40 from us in amounts that you need.

Prices are Prepaid and all sizes are available from stock unless otherwise noted below.

Discover, VISA, MasterCard, Paypal, AmEx. To order, call or e-mail.

All Fluorint™ Sales Are Final

Not Returnable and Non-Refundable after it leaves our premises.

Only certain devices use Fluorinert for coolant. If you are not sure, please don't order it.

Notes to laser technicians, Biotechs, HV engineers, Supercomputer engineers, Bitcoin Miners and other Fluorinert users :

  • Don't let this fluid drip. It is expensive!
  • All 3M Fluorinert have an EXPIRATION DATE, look for it. For example, FC-77 ( 3 yr life) was discontinued by 3M in 2008 but entrepreneurs are still selling it on e-bay!
    FC-75 and FC-84 have also been discontinued by 3M.
  • Do not use the cheap 're-claimed' Fluorinert™ available on the Internet in your laser tube. Why ? Because clean Fluorinert™ is extremely innert but if the used stuff has lost its 'innertness' in its previous life, your tube is done.
  • There exists Cheaper Not "3M" Fluorinert™ on the Internet. We do not know what it is but if you use other than manufacturer recommended fluid in your system you may pay for the consequences.

Payment Terms: All prices listed are for Credit Card payments below $999. Over $999 we add the 3.1% fee that is charged by the credit card company.

To order please call or e-mail.

July 1, 2021
3M increased FC prices by 2% on July 1, 2021. Below table shows updated prices.
3M Fluorinert
See available bottle sizes
Density 1.85 gr/cc
Shelf Life 5 yrs from
Date Of Manufacture (DOM)
Density 1.79 gr/cc
Shelf Life 3 yrs from
Date Of Manufacture (DOM)
shipping info -
250 cc ~1/2 kg
In stock
net wt.
~ 462 gr
$207 net wt.
~ 447 gr
$199 8x5x5
dimensional wt. 2 lbs
500 cc ~ 1 kg
In stock
net wt.
~ 925 gr
$321 net wt.
~ 896 gr
$311 8x5x5
wt. 3 lbs
1000 cc
In stock
net wt.
~ 1.85 kg
$535 net wt.
~ 1.79 kg
$485 10x6x6
wt. 5 lbs
5 kg =11 lbs ~ 3/4 gallon
plastic jug
In stock, 14 lbs In stock, 14 lbs 10x8x8
wt. 14 lbs
20 kg = 44 lbs ~ 3 1/4 gallon per request per request 54 lbs

The following smaller sizes of 3M Fluorinert FC-770 and FC-40 are also available for researchers who need very little.

65 cc ~2.2 oz
In stock
net wt.
~ 110 gr
$75 net wt.
~ 85 gr
$75 7x6x6
dimensional wt. 2 lbs
125 cc ~4.2 oz
In stock
net wt.
~ 230 gr
$125 net wt.
~ 224 gr
$125 7x6x6
dimensional wt. 2 lbs

See this Chart to Compare properties of the above FC's.

3M™ has DISCONTINUED and / or REPLACED the following FC's:

FC-75, FC-77, FC-84, FC-3255 and FC-5312 .
You may use replacement FC-770 in place of Fluorinert™ FC-77.

We ship same day IF your order comes in by 1 pm Eastern time (10 am West coast).

If you do Not specify shipping, we ship UPS Ground, FOB Parallax, Prepaid and Add to your invoice. Or you can specify carrier and shipping speed and give us your own account number.

Ships from:
We are in Waltham, Massachusetts 02453.
Weights is dimensional for 250 cc and smaller.
500 & 1000 cc, 3 lbs & 5 lbs respectively
For size, just enter 8x5x5 inch for the first 2 in the table, 10x6x6 for 1000 cc and 10x8x8" for 5kg (actual weight is greater than dimensional weight at 14 lbs).

This is an expensive product and you may want to consider carrier insurance for value..

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