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The Sad Truth About Oil Based Pavement Sealers.

Discussion in 'Seal Coating Forum' started by BIGBOY2008, Sep 1, 2011.

  1. BIGBOY2008

    BIGBOY2008 LawnSite Member
    Messages: 146

    There is no such thing as a oil based pavement sealer. Pavement sealing is needed to lock / seal the pre-existing oils into the pavement to keep them from being pulled out by the UV Rays of the sun.
    Once the pavement has been neglected to the point of theoretically needing oil added or infused back into the pavement the damage has already been done. Any attempts to introduce oils back into the pavement are futile attempt to save the pavement which will result in excess oil laying on the surface of the pavement. This excess oil laying on the surface will soon begin to turn the pavement into a mush. A prime example of this type of damage would be the oils stains on a commercial parking lot. If you were to shove a screw driver into one of these stains you would then see first hand the amount of surface softening that results from oil laying on the surface of the pavement.
  2. Pro-Tect

    Pro-Tect LawnSite Member
    from Cobourg
    Messages: 32

    Your statment has some truth to it but is mostly false. The truth is that oil base isn't really a sealant. Its more of a rejuvenator... it's not designed to seal the pavement its designed to breath life back into asphalt. Oil base sealant has been widly used here in ontario and across canada for a number of years and it is still technically the best choice for a driveway. And its not the sealer that does the damage to the oil spots its the oil spots are bleeding through. They really should be primed or dealt with in other ways before the sealer is put down.

    There are pros and cons to every type of sealer and I know tones of arguments can be made for all types, but really what your saying has a minor amount of truth and a lot of false.

    The issue with "sealer" is that when the pavement is sealed it does not alow the asphalt to breath properly which in turn can cause alligator cracking. This is more of an issue with driveways over parking lots as parking lots you can put a major coat on with lots of sand. Again there are arguments that go all ways.
  3. JFGauvreau

    JFGauvreau LawnSite Bronze Member
    Messages: 1,298

    I believe bigboy is refereeing to the gilsonite sealer found in the states. Which some travelers add a lot of varsol or gas in their mix.

    Sometimes they think we Canadians are using that gilsonite all over the country. That would be false, like pro-tect said, we're using a rejuvenator, a stainer that soaks in the asphalt. Yes it does stay shiny.. but not for more than 2 weeks, after that it's a nice jet black appearance. And it doesn't wear off in 6months, it can last up to 2-3 years, depending on the application.

    Their is a lot of mixed up in my opinion with gilsonite and the stuff we have in Canada. It's really not the same, it's a very good product to use on oxidize asphalts, I've seen jobs done by some company that were using coal tar and AE brought from the US. It's a totally different product, and the jobs were looking pretty nice I must admit. But they didn't last threw the winter. Our sealer is designed for our harsh and cold winter.

    Their is no need to try to repair an oil spot, when you can put your finger right threw the asphalt just like butter; the proper way would be to cut out the asphalt and replace it with new hot asphalt.
  4. BIGBOY2008

    BIGBOY2008 LawnSite Member
    Messages: 146

    Im specifically talking about what some contractors refer to as "Oil Based Pavement Sealers" which simply do not exist. Im not talking about rejuvenators which do not function as sealers do.

    The first paragraph of my posting read in the following manner:

    There is no such thing as a oil based pavement sealer. Pavement sealing is needed to lock / seal the pre-existing oils into the pavement to keep them from being pulled out by the UV Rays of the sun.

    All information i posted is truthfull in regards to the aforementioned paragraph so therefore how could one say it contained misinformation?

    Alligator cracking is not a result of "not allowing the pavement to breathe properly". It is the result of one or two of the following factors. The first factor is possible pavement base structure failure and the second factor is UV Rays having pulled or leached the pre-existing oils out of the paved surface resulting in a non-pliable paved surface.
    All new pavement has "x-amount" of oils in it to allow the pavers and rollers to compress it into final form. Over a period of time the UV Rays of the sun will gradually draw these pre-existing oils out of the paved surface. Unless the pavement is sealed in order to prevent these oils from being lost the drying out of the pavement will continue. As the inner oil content of the paved surface decreases the drying out of the pavement will increase. This causes the pavement to become brittle and prone to cracking as can be evidenced on any of the older parking lots that have never been sealed. If sealing was to blame for causing pavement to crack then these never before sealed parking lots would not show signs of sun and weather related damage.
    Last edited: Sep 10, 2011
  5. Mdirrigation

    Mdirrigation LawnSite Gold Member
    Messages: 3,381

    If it isnt a gilsonite sealer they are using , and it isnt coal tar emulsion or asphalt emuslion , what would it be ? What I have found in my 12 years sealing , if it can be cut with a solvent , it will be .

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