If you really are concerned. Vacuum bag it. Added bonus works great for putting by the summer harvest for winter eating.

https://m.media-amazon.com/images/S/aplus-media/vc/211bad8f-acf4-437f-bdf5-6c7fd2e3fd6b.jpg

throw some of this in the bag before sealing

https://www.collectons.com/images/items/2013/07/15/1373925174.jpg

If you know that master cylinder worked well you could flush with fresh fluid. Then plug tight the two outlet lines.

If you got that master from a unknown car I would take it apart, wipe parts dry and air blown. Clean cylinder and inspect that there is no corrosion in there. I world then cover the cylinder inside with SilGlide or compatible brake system lubricant to avoid corrosion.

I would store all parts in a zip lock bag. Or re-assemble and store in a zip lock bag with both outlets plugged.

Maybe you could use those desiccant packs if you have some from drug packages.
I think you heat them up in the oven & it drives away any captured moisture.
then stick them in w bag for the MC

Fill the piston with silicon spray, (bench prime) it to get the silicon on both sides of the seals and cap it off. Bag it and add moisture packets. If you leave brake fluid in the master, moisture will fine it's way in. When ready to put into service, just flush with Brake Fluid. I have a couple of New Masters for my old Saab's and they were perfect when I installed them because I stored them like this. I still by spare parts for my Volvo when I see them. Junk yards around here just strip and crush the cars anymore once they get the engine and trans. out. and sell a few parts. They have to make room daily. Not like the old days.

Hi,

I think this topic has been on here before.

The only thing that I can say to use is this product.

https://www.airosol.com/product/assembly-lube/
McKay has been around a long time!
I think they even make the radiator hoses for Volvo if it's the same company as they seem to be labeled the same.
The hose rubber is or products are made in Australia as best I can gather.
You can find it in auto parts stores and on E bay.
I use to get it right off the shelf many years ago. Never new anything about the stuff being imported so who know where and how things are today!

I can only imagine the brake part rebuilders use this stuff and ship their products for some amount of shelf life.
Maybe you can contact these people and ask for more technical data.

It appears they are into lots of of other product lines from them and they will even will put your name on a product for an order of quantity.

Might be worth a shot!

Phil

Are you talking about power brakes?

If so, I would separate the cylinder part from the vacuum part. Consider the needs of each section.

About the only stuff that all the parts of a master cylinder would be compatable with would be brake fluid. Perhaps you could figure how to immerse the cylinders in fluid.

This seems difficult, but you might be able to put several closely packed in a container - you could then fill up most of the excess space with a compatible material such as some inexpensive small metal parts or scraps that you can obtain. Perhaps some of your other collections.

As for the vacuum assembly, I would separate the soft parts from the metal ones,.

Clean and dry the soft parts and put them in strong plastic bags.

Store the metal parts in relatively air tight containers.

I use plastic buckets. I purchased 50 buckets from a floor cleaning company, Half were soap and half were wax - the washed up nicely when I rinsed the wax ones and washed all of them in a tub, using the floor soap. I washed buckets, covers and seal rings as groups. Then can hold heavy stuff and are stackable.

I also save rectangular buckets from kitty litter to store lighter items. Do you have a friend with a cat?

Share a few of your tricks with us.