Latex or Oil
Discussion in Striping & Marking started by RippedHog (unclaimed legacy handle), Jun 16, 2005. 33 replies, last reply Jun 30, 2005.
Yesterday we striped a lot even before the roller was finished packing the asphalt..... no choice due to circumstances. We used ICI Dulux white alkyd CR. No problems at all with the hot asphalt changing the color. Bottom line...alkyd works just fine on asphalt (here). Unless the sealcoat is asphalt emulsion, we do have to use latex (over coal tar sealer).
Just got a request to paint over asphalt emulison. had to tel the engneer that if they insisted on using it then I would have to add $5,000 to the job so I could buy a new maching just for latex. They took it back to the drawing board and now are requiring coal tar. this lot is only 200 stalls with no color change or HC. No one here has ever sealed with asphalt emulison so why start now.
Alkyd works just fine for us over the asphalt emulsion sealer used here. Not clear on why you'd need a latex machine. Are you having success spraying alkyd over coal tar? If so, bet the cooler temps are allowing it. White alkyd goes to coffee color in about 30 seconds over coal tar sealer here in this Texas heat.
Wow, the way you guys talk about oil base in this thread makes want to give oil a try. Back when they took 250 VOC away from us we pondered over whether to use the oil acetone based or latex/water based. Because of the volatility and explosiveness we read about when doing research we decided better safe than sorry and went with water. Has anyone ever had or witnessed an explosion caused by the use of acetone? Is acetone and alkyd the same animal?
\\\Stripes/// The reaction between coal tar sealer & paints is simple chemistry, not temp related although I guess that could speed things along). Coal tar repels oils, solvents, and all other thing petroleum. So what you see turning your stripe brown (and the same thing happens to yellow, you just don't see it as bad) if you look very closely (maybe magnifying glass) is actually zillions of little tiny "oil" or solvent drops that have been driven away from the coal tar and out of the paint to the surface where (like oil) they are brown. Part of the brown comes from the reaction from the coal tar but in a nutshell that's the deal with ANY paint containing petroleum and coal tar sealers.
I have used a few fives of ICI recently, so far so good, we'll see how it holds up over time. It was $1.50/gal cheaper than D-V, ICI did have a price increase of 10% since I bought 100 gallons. One thing I do not like is the date on the can, if I am reading the date code correctly it was made 6-04.
We use solvent (oil) based CR over new asphalt, and asphalt emulsion seals all day long with no problems. Regarding ICI, I was told that their paint was actually Aexcel paint, if that is true, then I might switch, we had the chance to use a few pallets last year of Aexcel CR and really liked it.
One thing with SW, it seems like they increase prices and hope it works and nobody complains, we have gone in after large increases and told the store mgr it was unacceptable and we were going to switch, and he had no problem adjusting the price in the computer, he did not even think twice about reducing it, so given how easy that was amazes me why they would risk losing business. I agree with small increases to cover the rising cost of raw materials, but this last year SW must have started to add gold to the paint by the price increase, but like I said the mgr quickly reduced it back to normal after we complained...I guess thats corporate America..
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