Storing brake fluid

[Lojs]

I have changed my OEM brake fluid last summer to Castrol SRF using one of those pressurized brake bleeders. I ended up having 3/4 of the second bottle left in the pressurized container.
Now before the season I want to bleed the brakes. Knowing that the brake fluid tends to absorb moisture, can I use the leftovers that were stored in the container? It was stored airtight, however there was also a lot of air in it.
Or should I rather get rid of it and just use a fresh new bottle?

[HP Autosport]

Originally Posted by Lojs

I have changed my OEM brake fluid last summer to Castrol SRF using one of those pressurized brake bleeders. I ended up having 3/4 of the second bottle left in the pressurized container.
Now before the season I want to bleed the brakes. Knowing that the brake fluid tends to absorb moisture, can I use the leftovers that were stored in the container? It was stored airtight, however there was also a lot of air in it.
Or should I rather get rid of it and just use a fresh new bottle?

Although SRF is one of the best at fending off moisture it is still best to use a fresh bottle especially the open bottle has been in storage for a while(I assume one year).

[afadeev]

Originally Posted by Lojs

I have changed my OEM brake fluid last summer to Castrol SRF using one of those pressurized brake bleeders. I ended up having 3/4 of the second bottle left in the pressurized container.
Now before the season I want to bleed the brakes. Knowing that the brake fluid tends to absorb moisture, can I use the leftovers that were stored in the container?

You can use it, but it has spent the last 9 months sitting in the tank, absorbing moisture. So the fluid's boiling point is now closer to the "wet" boiling temperature level than "dry".

Originally Posted by Lojs

It was stored airtight, however there was also a lot of air in it.
Or should I rather get rid of it and just use a fresh new bottle?

If your budget allows, I would throw old fluid away and open a new bottle.

In the future, if you have more than 1/2 of a bottle left, you could pour it back into the original bottle, cover the top with plastic film, and screw the cap back on. Or just throw it away, to be safe ;-).

a

[Lojs]

Originally Posted by afadeev

You can use it, but it has spent the last 9 months sitting in the tank, absorbing moisture. So the fluid's boiling point is now closer to the "wet" boiling temperature level than "dry".

If your budget allows, I would throw old fluid away and open a new bottle.

In the future, if you have more than 1/2 of a bottle left, you could pour it back into the original bottle, cover the top with plastic film, and screw the cap back on. Or just throw it away, to be safe ;-).

a

Thanks, I already replaced it with new juice. It's a bad item to be saving money on if you track.))

[HP Autosport]

Originally Posted by Lojs

Thanks, I already replaced it with new juice. It's a bad item to be saving money on if you track.))

Very true.