Jaguar 25
Well-Known Member
What is it and what should it be used for? Been nagging me for ages as I thought that all grease was waterproof!
Water Proof Grease - what is it?
- Thread starter Jaguar 25
- Start date
RichardS
N/A
It's used for packing bearings which run in contact with water such as waterpumps, rudder bushes etc. Often referred to a calcium grease or waterpump grease.
Most greases as waterproof but waterproof grease is exceptionally "sticky".
Richard
Most greases as waterproof but waterproof grease is exceptionally "sticky".
Richard
vyv_cox
Well-Known Member
Greases are a two-part mixture consisting of oil carried in a 'soap' that increases its consistency for practical reasons. In the past, soaps were all mineral based, calcium, lithium and sodium compounds all being used for various purposes. Nowadays organic soaps are more common, urea being widely used. Greases are tailored for various purposes, including resistance to water and temperature, load carrying capability, consistency and others. Calcium soaps remain the most resistant to water but have lower thermal resistance.
Jaguar 25
Well-Known Member
Thanksforthe responses. As exMIMechE I should have known that. However, BSc courses in mechanical engineering were more based on theory and failed to deliver on practical engineering. That's my excuse anyway!
RichardS
N/A
Indeed it is ..... and I also have a tub of white marine grease. However, it's not calcium grease so not the most waterproof available.
Richard
LadyInBed
Well-Known Member
Is one brand of calcium grease better / more popular than another?Indeed it is ..... and I also have a tub of white marine grease. However, it's not calcium grease so not the most waterproof available.
Richard
RichardS
N/A
I use this: https://www.ebay.co.uk/itm/MILLERS-...679940?hash=item5b4dc37884:g:fk8AAOSwZ3BaaRuW but it's probably much like any other.
Richard
thinwater
Well-Known Member
Another thing to consider is a synthetic base (still must be waterproof). They don't harden. Lewmar Winch Grease is an example.
lpdsn
Well-Known Member
I was pretty sure Ramanol was a Lithium grease from memory, but I was able to confirm it by clicking on your link.
VicS
Well-Known Member
I was pretty sure Ramanol was a Lithium grease from memory, but I was able to confirm it by clicking on your link.
It depends on which Ramonol grease you are talking about!
Ramonol White grease is a lithium soap based grease
Ramonol Universal grease and Ramonol Advanced grease are both calcium sulphonate based .
https://www.gruebb.com/catlist.php?catid=29
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Ruffles
Well-Known Member
An essential property of waterproof grease is that it stinks.
