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CRC Heavy Duty Pro Degreaser #5246100 10/21/19 01:43 PM
Joined: Feb 2011
Posts: 7,489
LeakySeals Offline OP
OP Offline
Joined: Feb 2011
Posts: 7,489
I bought this yesterday. Anybody use it? I'm a little gun-shy to use anything on the engine after Purple Power corroded aluminum under the hood.

CRC Heavy Duty Pro Degreaser

06 Escalade 6.0L LQ9 AWD 170k M1 5w30
03 Maxima 3.5L 170k Maxlife HM 10w30
05 Malibu Classic 2.2 111k M1 5w30
06 Altima 2.5L 167k unk
Re: CRC Heavy Duty Pro Degreaser [Re: LeakySeals] #5246126 10/21/19 02:03 PM
Joined: Jan 2004
Posts: 6,038
nthach Offline
Joined: Jan 2004
Posts: 6,038
Looking at the SDS of the non-aerosol version of the CRC stuff vs. the Purple Power there's quite a bit of a difference. PP has 25% lye(Sodium Hydroxide) which explains why it corroded your aluminum. pH seems to be same but I would trust the CRC stuff. I've been using Simple Green HD(purple liquid) or WD-40 Specialist Water-Based Degreaser for my underhood cleaning. They aren't as caustic to Al as Purple Power/Super Clean and its clones.

Re: CRC Heavy Duty Pro Degreaser [Re: LeakySeals] #5246150 10/21/19 02:18 PM
Joined: Feb 2009
Posts: 2,172
krismoriah72 Offline
Joined: Feb 2009
Posts: 2,172
I use LA totally awesome.. $1 does all that i ever want out of a degreaser.

Re: CRC Heavy Duty Pro Degreaser [Re: LeakySeals] #5246493 10/21/19 08:15 PM
Joined: Nov 2009
Posts: 57
RDMgr Offline
Joined: Nov 2009
Posts: 57
I don't think the PP contains 25% NaOH. It contains 3-4% of a 25% NaOH solution or 0.75-1.0%. It is probably used to adjust pH for solubility and clarity which is a common practice is water based cleaner/degreasers.

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