methods for gum and motor oil

Discussion in 'Power Washing' started by stevenf, Nov 3, 2011.

  1. stevenf

    stevenf LawnSite Bronze Member
    Messages: 1,612

    I am starting a pressure washing business. One bid is for a fast-food drive thru to have weekly washing. I know gum and oil will be the main concern.
    Someone mentioned liquids nitrogen on gum so it will chip off...???
    And is there a way to remove oil without etching the concrete?
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  2. Mike B.

    Mike B. LawnSite Member
    Messages: 19

    Hot water is a must, melts gum off concrete with out damage.
  3. stevenf

    stevenf LawnSite Bronze Member
    Messages: 1,612

    I will be using a 3500 Psi 4gpm cold water machine. Any other recommendations for gum and oil? Are there any heaters to install in plastic drums for temporary hot water?
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  4. Everett Abrams

    Everett Abrams LawnSite Member
    Messages: 32

    Couldn't agree more. I would go in the day after a contractor showed up with a cold water washer and show the decision makers the difference. Invest in a hot water washer and you will increase customer satisfaction and keep accounts long term.
  5. JCinNJ

    JCinNJ LawnSite Member
    Messages: 159

    for concrete work, more GPM the better
  6. stevenf

    stevenf LawnSite Bronze Member
    Messages: 1,612

    Is it better to sacrifice gpm and psi for a cheaper hot waters setup?
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  7. rlitman

    rlitman LawnSite Bronze Member
    Messages: 1,742

    Most people would advise that, yes.
  8. Roof Cleaning Virginia

    Roof Cleaning Virginia LawnSite Member
    Messages: 189

    JC - can you advise at what point is it diminishing returns with higher GPM machines? I'm recently advised that runoff then becomes an issue, and excessive water usage. (I'm in the research phase of expanding to commercial flatwork as well.)

    Your thoughts please?

  9. stevenf

    stevenf LawnSite Bronze Member
    Messages: 1,612

    Well I couldn't make myself invest in an expensive machine so I bouught a 3800psi 3.5 Gpm and it works great! Takes gum off with ease. Removes the top layer of oil stains but I'm beginning to think oil cannot be removed....
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  10. mownredneck

    mownredneck LawnSite Member
    Messages: 245

    Get some purple power degreaser and spray it on the oil spots and let it soak in for about 15min, them wash her off, It wont always get all of it up but the majority. Oil stains in concrete that has been there for a while is somewhat of a pain. Hope this helps.

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