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Old 08-30-2008, 08:04 AM   #1
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Power Wash driveway before sealing


Hi;
I am going to apply sealant to my driveway. Last time it was done, we had a pro do it, and he used a small power wash machine. I don't know what the pressure was, but now I find that the smallest machine I can rent is 2,000psi.
Is this too strong for power washing the driveway?
It's asphalt, and already has a coat of sealer, but we are re-applying again this year since we already have the stuff.
I just don't want to remove the sealer that's already on the driveway, so I'm concerned about the pressure of the power wash.

Thanks

FW

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Old 08-30-2008, 10:06 AM   #2
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Power Wash driveway before sealing


if 2Kpsi removes old sealer, it'd lift off eventually no matter what so don't worry about that part,,, just use the 15degree nozzle & adjust tip-to-d/w distance as rqd,,, 2K psi isn't big. i'd worry MORE about the age of the sealer & how its been stored,,, there'll have been some settling of the solids so be certain to mix THOROUGHLY,,, hopefully it'll still be good.

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Old 08-30-2008, 03:33 PM   #3
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Power Wash driveway before sealing


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Originally Posted by yesitsconcrete View Post
if 2Kpsi removes old sealer, it'd lift off eventually no matter what so don't worry about that part,,, just use the 15degree nozzle & adjust tip-to-d/w distance as rqd,,, 2K psi isn't big. i'd worry MORE about the age of the sealer & how its been stored,,, there'll have been some settling of the solids so be certain to mix THOROUGHLY,,, hopefully it'll still be good.
Thanks for the advice. My sealer was applied last summer (around Sept), so what I have is about 1yr old. I was told by the guy who did it last year that if we re-applied this year, it should be good for another 5yrs.
From what I have read, the sealer should still be good.

What do you recommend to mix it. It's a latex base. I was thinking about buying a drill attachment, and mixing with my 3/8" hand held drill. Would that work?

I have one full never opened drum and one about 1/2 full from last year. It has been stored in the basement, upside down as recommended.

FW
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Old 08-30-2008, 03:38 PM   #4
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Power Wash driveway before sealing


drum ??? as in 55 gl drum ??? i'd turn the drums upside down ea day for another month then remove the tops & pour into 5gal pails,,, 3/8" might work but i'd be using a full 1/2" 550 rpm instead,,, might want to rent that as they're $150-$200 to buy.
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Old 08-30-2008, 07:05 PM   #5
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Power Wash driveway before sealing


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Originally Posted by yes.itsconcrete View Post
drum ??? as in 55 gl drum ??? i'd turn the drums upside down ea day for another month then remove the tops & pour into 5gal pails,,, 3/8" might work but i'd be using a full 1/2" 550 rpm instead,,, might want to rent that as they're $150-$200 to buy.
Sorry about the confusion. I referred to the 5gal pails as drums. Couldn't come up with the correct word at the time... brain fart<g>

The pails were upside down all winter in the basement. Now I've turned them back right-side up.

FW
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Old 08-30-2008, 08:21 PM   #6
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Power Wash driveway before sealing


i was just laffing at thinking they could seal ar 1,000yd long d/w in 1 day - by hand ok, maybe your little itty-bitty drill'll work, then,,, we used 1x2's cause they were always on the truck.
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Old 08-31-2008, 06:55 AM   #7
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Power Wash driveway before sealing


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i was just laffing at thinking they could seal ar 1,000yd long d/w in 1 day - by hand ok, maybe your little itty-bitty drill'll work, then,,, we used 1x2's cause they were always on the truck.
Actually, the 1x2 sounds like a better method. I have some pieces of lumber around. I also have a length of 1/2" PVC I could cut down.

My "itty bitty" drill isn't so itty-bitty! It's an old Craftsman, that is bigger than most 1/2" drills today<g>. I'd love to get a 1/2" drill, but I'm trying to squeeze every last twist out of the old one.

FW
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Old 08-31-2008, 07:44 AM   #8
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Power Wash driveway before sealing


1/2" PVC's out - too flimsy imn-s-hfo

a REAL 1/2" drill works at 540-550 rpm,,, w/drywall mud-mixer'll work GREAT, bud,,, most h/o 1/2" drills run too fast to efficiently mix viscous mtls,,, they're 1/2" ONLY in the size of the chuck - usually jacobs.

now go get to work i'm tiring of this thread

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