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10/16/2023 6:15 PM  #1


White stuff on New radiator and heater hoses

Just bought some new radiator and heater hoses. Some of the hoses have a white residue on them. Not sure what it is. I tried a couple products to get it all off with not much luck. Anybody know what to use to get that white residue off of the new hoses?


1966, vert, Installing a new 347, 5 speed, 4 wheel disc, pb, 3.70 LS 9", epas
 

10/16/2023 6:21 PM  #2


Re: White stuff on New radiator and heater hoses

For a start I’d try WD 40.


Good work ain't cheap, Cheap work ain't good!   Simple Man
 

10/17/2023 5:19 AM  #3


Re: White stuff on New radiator and heater hoses

I believe its some kind of mold release agent.  I've noticed the same thing on some of the hoses I've bought.  I tried dish soap and water, which removed most of it, but some of it is tacky and clearly not water soluble.  I then went with isopropyl alcohol, which did little to nothing.  I think it was either mineral spirits or Goof Off that finally worked. 

Last edited by TKOPerformance (10/17/2023 11:25 AM)

 

10/17/2023 8:34 AM  #4


Re: White stuff on New radiator and heater hoses

Rudi wrote:

For a start I’d try WD 40.

WD-40 is what I used. 
 


65 Fastback, 351W, 5-speed, 4 wheel discs, 9" rear,  R&C Front End.
 

10/17/2023 9:05 AM  #5


Re: White stuff on New radiator and heater hoses

I use that stuff you spray on tires to make them look clean and black. Spray it on a rag and wipe on the hoses.  Makes even old hoses look new.


Money you enjoy wasting is NOT wasted money... unless your wife finds out.
 

10/17/2023 9:34 AM  #6


Re: White stuff on New radiator and heater hoses

I worked at Advance for a while when I was younger and I once asked that very same question.   I was told it was mold release agent.  I was told: Not all manufacturers use the same products and not all manufacturers wash their final products the same.  Get back to stocking!


If multiple things can go wrong, the one that will go wrong will be the one that causes the most damage.
 

10/17/2023 11:49 AM  #7


Re: White stuff on New radiator and heater hoses

And speaking of WD-40, I use it as a cutting fluid on aluminum and brass...works great.  Butt (TS&T) I got tired of paying for aerosol cans.  HF, and others, I'm sure, sell it in gallon cans.  Cheaper and with a spray bottle, just as handy.

 


"you get what you pay for, good work isn't cheap, and there are NO free lunches...PERIOD!"
 

10/17/2023 12:10 PM  #8


Re: White stuff on New radiator and heater hoses



Thanks for the input.
You can see on the right side of the hose some of the white came off but not much.
Mother's Back to Black Tire Cleaner - Didn't do much
Adams Graphene Ceramic Spray Coating - Didn't do much.
WD-40 - Removed some white but not all.
Mineral Spirits - Removed some white but not all.
Orange Goop - Used a tooth brush to scrub, worked pretty well but too much work
Goof Off - Bought it in a spray can, this worked the best but still required a toothbrush on certain areas

Last edited by KeithP (10/17/2023 12:11 PM)


1966, vert, Installing a new 347, 5 speed, 4 wheel disc, pb, 3.70 LS 9", epas
     Thread Starter
 

10/17/2023 3:33 PM  #9


Re: White stuff on New radiator and heater hoses

BRAKLEEN (I love this stuff!) might take it off-take it all off !!
6sal6


Get busy Liv'in or get busy Die'n....Host of the 2020 Bash at the Beach/The only Bash that got cancelled  )8
 

10/19/2023 6:38 AM  #10


Re: White stuff on New radiator and heater hoses

KeithP wrote:



Thanks for the input.
You can see on the right side of the hose some of the white came off but not much.
Mother's Back to Black Tire Cleaner - Didn't do much
Adams Graphene Ceramic Spray Coating - Didn't do much.
WD-40 - Removed some white but not all.
Mineral Spirits - Removed some white but not all.
Orange Goop - Used a tooth brush to scrub, worked pretty well but too much work
Goof Off - Bought it in a spray can, this worked the best but still required a toothbrush on certain areas

I suggest soaking with WD-40, let it sit for a few minutes and use a brush. 
Maybe try using a 'tire' cleaner if that doesn't work. 


65 Fastback, 351W, 5-speed, 4 wheel discs, 9" rear,  R&C Front End.
 

10/19/2023 2:00 PM  #11


Re: White stuff on New radiator and heater hoses

I wonder if it has silicone in it.  You could try TSP.  Its one of the only things I know that will break down silicone.  I think you're still going to have to bush it to get into the details.  Another thing which might work is white vinegar mixed 1-3 with hot water.  I use that to get grout haze off tile and a lot of the new grout has silicone additives in it. 

 

Board footera


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