Tuesday, December 3, 2024

Not all Winterizing Products are the Same

3-2014

As part of an up-coming Practical Sailor article I tested the anti-corrosion properties of a number of leading winterizing agents:

The test rig...
 
Ethanol Based                                  Glycol Based

The coupons after 2 months...

The left hand column, all ethanol-based.
  1. Water
  2. Vodka
  3. I won't tell... just avoid ethanol.
  4. I won't tell... just avoid ethanol.
 The right hand products I like, all propylene glycol-based. I forget the order, but they were all perfect.
  1. Starbrite
  2. Camco
  3. Pure Oceans
  4. Sudbury Marine
  5. Southwind/Dow Frost

The clear point is not to be a cheapskate. Stay with something reputable, and stay with glycol.

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