Trucks & Trailers - Leaf Spring Protection

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View Full Version : Leaf Spring Protection

03-08-2011, 12:53 PM
Just put new leaf springs on my salt water boat trailer and before I expose it to the water again I was wondering if there is any good protection that I can put on the springs. Just trying to delay them from rusting out.

Any suggestions?

go fish
03-08-2011, 05:21 PM
STP oil treatment. Messy though.

03-08-2011, 08:10 PM
First I smear them with trailer wheel bearing grease then I spray them with either Boeshield or Corrosion X a few times a season, that keeps the rusting minimal....

03-09-2011, 04:25 AM
you can try to spray them with some inhibitors but as soon as you hit a bump that part will rub against the other springs and come off exposing nice new metal just waiting to start rusting. Best thing you can do which isnt usually possible at most ramps is rinse them as soon as you pull them out with freshwater.

Major Woods
03-09-2011, 06:02 AM
I spray mine with a rust inhibitor (various brands) several times a year. The springs are discolored but show no signs of flaking or heavy rusting in the 7 years I have owned it.

Pez Vela
03-09-2011, 02:19 PM
Resiliency is the key ... something that doesn't wash off easily. I'm using T-9. From their website:

"Boeshield T-9® was developed and licensed by The Boeing Company to fill their need for a superior lubricant/protectant. The formulation, based on a unique combination of solvents and waxes, is designed to penetrate metal pores and dissolve minor corrosion, then leave a resilient waxy coating that lasts for many months. We began by successfully introducing Boeshield T-9® to the tough saltwater marine market for lubricating and protecting all metals."

03-09-2011, 09:20 PM
Mix some kerosene with STP, jack the trailer (to extend the springs), use a brush to coat the springs paying particular attention to the spaces between leafs, let the kerosene evaporate, unjack and hit the road. The kerosene allows the mixture to capillary between leafs, then evaps and leaves the STP residue ... :thumbsup:

03-10-2011, 12:44 PM
Thanks to all for the responses.

03-12-2011, 08:04 AM
Try this product, I've used it for years...Its called open gear Lubricant and the best way to apply it is to jack up the trailer, unloaded, so the wheels/axles are hanging down and opens up the springs, then just spray liberally all over...It will generally for two or more seasons and then just touch up periodically...The bottle is generally enough for 4 springs, although i also used to spray it on my winch/cable,before switching to strap.

03-12-2011, 10:26 PM
any comments on giving them a spray with diesel couple times a season?

03-14-2011, 06:54 PM
Don't laugh but we pour cooking oil from frying fish on them...... NEVER rusts. LOL must be the FISH OIL:grin:

03-14-2011, 07:52 PM
I've used that cold galvanizing that comes in a spray paint can. My grandpa always swore by painting them with used motor oil - obviously wasn't concerned about the environmental impact.

03-15-2011, 10:01 AM
I replaced mine 2 years ago. I sprayed them with that rubber undercoating spray and they still look great. The only place there is a little surface rust is where they rub the shackles but I spray a little oil on them.

03-15-2011, 10:09 AM
Can you use the STP treatment or something else if they are already rusty to slow it down?

03-15-2011, 10:22 AM
I spray mine with WD-40. It will soak in between the leafs as evidenced by the staining on the other side. I used to just rinse them at the car wash, but they would corrode between the leafs.

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