View original topic: Phosphoric acid at Home Depot in Canada?
ovalhobo Fri Feb 25, 2011 12:53 pm

I went to Home Depot (in Canada) and asked about phosphoric acid. They looked at me like I had two heads. They had no idea what I was talking about.

Would any of you happen to know the name brand of this product in Canada (and if it can be purchased at Home Depot in Canada). I do know about Rust Converter etc (which are available and I have used); however, these products tend to come in small containers, usually in spray cans, and are quote expensive. I'm looking for the larger containers.

Thanks so much for your help.

c21darrel Fri Feb 25, 2011 1:05 pm

When i asked i got the same response...Its called "Prep and Etch" Gallon container for about $15 in USA.

ovalhobo Fri Feb 25, 2011 1:07 pm

I wonder if they have that product in Canada. I'll check this weekend.

Thrasher22 Sat Feb 26, 2011 2:32 pm

I got the exact same response :lol: Let me know what you find, I still need to pick some up.

ovalhobo Sun Feb 27, 2011 5:03 pm

Well, I went there today. I asked about Prep and Etch and Ospho. They had neither. Where else they might have this stuff in Canada?

hpw Sun Feb 27, 2011 5:47 pm

ovalhobo wrote: Well, I went there today. I asked about Prep and Etch and Ospho. They had neither. Where else they might have this stuff in Canada?
After a quick search on the Kleanstrip website, see if this helps.

ovalhobo Sun Feb 27, 2011 8:31 pm

Thanks. I'll ask for that product. I'll also check Wally Mart. I see that these products are available in USA nation wide, but I'm not so sure about Canada. I wonder if they'd ship this stuff over the boarder?

TonysGarage Sun Feb 27, 2011 9:10 pm

the problem with asking people that work at home depot is...most of them are IDIOTS!

ive asked for phosphoric acid before and they had no idea what it is---they'll stock it in the paint department..near acetone, laquer thinner, etc...just read the bottle...dont ever ask someone that works there

tspot100 Mon Feb 28, 2011 11:47 am

try tractor supply warehouse if you have them in canada. they stock gallons of "milk stone remover" guess what the main ingredient is???? phosphoric acid. highest percentage i have seen. cheap too, around 10$ per gallon. couldn;t find ospho locally ...i had to mail order a case...

guy dagenais Wed Mar 02, 2011 5:21 pm

Hi Ovalhobo

I live in Montreal and the product that you want is :

SURF-PRO Rust Buster and Primer (it's phosphoric acid).

I use it and it works well.

I've bought mine at Canadian Tire

This product is made in Ste-Julie, Québec (KOSMIC SURF PRO INC)


EV Carthago diesel

engineerscott Fri Mar 04, 2011 9:39 pm

Another product that Home Depot carries (at least in the U.S.) is Ospho. In a 1 gallon concentrate bottle. It is phosphoric acid and surfactants and is used as a metal pre-treat prior to painting.

This is what you are looking for:

ovalhobo Sat Mar 05, 2011 10:55 am

I asked for Ospho at Home Depot. They looked in their computer and came up with nothing. I'm guessing they don't sell this in their Canadian stores? I will search Crappy Tire for Surf-Pro next. Thanks everyone!

Thrasher22 Mon Apr 18, 2011 10:55 am

Though I'd bump this for other stuck Canadians.

I picked up a bottle of stuff called Rust-mort at a local autobody supply in Calgary last weekend. Its 75% phosphoric acid and seems to do the trick...

Wasn't cheap, I paid $40ish for around 700ml. This shop tends to have pretty high prices normally though.

guy dagenais Mon Apr 18, 2011 7:04 pm


That's really expensive, I paid around 10$ for same amount at Canadian Tire for the other product (Rust Buster)

Thrasher22 Wed Apr 20, 2011 10:46 am

I didn't see that last time I was at Can tire... The horrible music they're usually playing at the one near my house usually means I'm in a huge rush to get out haha. I have to go buy more MIG wire tonight, so I'll take a look.

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