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Old 11-24-2013, 09:54 PM   #15
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CLR and a brush on both concrete and asphalt. Do not use petroleum based cleaner on asphalt unless you want a hole after a while. Once parked on angled asphalt driveway and blew a fuel pump. Lost 1/4 tank of fuel and the driveway.

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Old 11-25-2013, 06:57 PM   #16
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Grease Lightning" sold at Lowes or HD

Don and Nancy
[2014 40QBH Phaeton, 2015 Buick Enclave, 2yr old sisters Sara n Kaycee, Havanese, Two Segways
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Old 11-25-2013, 07:12 PM   #17
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You'll remove 85% of the stain on concrete but unless it had a sealer on it that's as good as you'll get.
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Old 11-25-2013, 07:52 PM   #18
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Although it doesn't actually "remove" the stain, Muriatic Acid on concrete will bleach out the stain and make it invisible. It's my understanding that once the petroleum product has penetrated the pores of the concrete, it's impossible to remove.
Frank Damp -Anacortes, WA,(DW- Eileen)
ex-pat Brits (1968) and now ex-RVers, as of 08 Dec 14.
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Old 11-27-2013, 12:07 AM   #19
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I have found a easy way! I would not use it on asphault however will work good on concrete. You will use clay based kitty litter, lacquer thinner, black heavy trash bag and something to weight the bag down.

The process is to put light coat of kitty litter over spilled area approximately 1/4" to 1/2" thick, follow by wetting the kitty litter with the lacquer thinner, cover with black heavy"contractor type trash bags, weight down edges with some kind of weights. wait a few hours. sweep kitty litter aside and check stain. repeat as necessary. works better in bright sun or warm temps. Learned that one many years ago from an old mechanic.
Good luck, Spence.
Spencer & Tracie RVM#62
2013 RAM 3500DRW 4x4 Laramie, Cummins, 385HP,850FTLBS Aisin Trans
2014 DRV Elite Suite 41RESB4
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Old 11-27-2013, 12:21 AM   #20
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Have used powdered Tide, works great. Could try Simple Green full strength, it may work. Be careful what you put on the asphalt. Be careful with the acid on concrete, it will etch it.


Chuck & Teri, 1999 35 ft. Dolphin 5350, F53 Chassis with tag axle, Chassis build date 1/99 in Mexico, Banks System, Trans Command, Air Lift Air Bags on rear, Koni Shocks, Blue OX TruCenter, TigerTrak track bars front and rear, Roadmaster 1-3/4" rear auxiliary sway bar, 2013 VW Passat TDI SEL Premium, 1994 36 ft. Avion 5th Wheel. FMCA #F430129
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