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Old 03-23-2020, 09:23 PM   #1
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Spraying block fillers?


I have a little over 300 sq ft. of concrete block retaining wall that needs block filler applied. I used original Drylok w/ a brush and made it about 5' and thought there has to be a better way to apply this stuff. FYI I tried a couple different 1" rollers and found it didn't penetrate all that well.

So what about an airless sprayer? Would a Titan 850 spray block filler? Have a friend (2.5hr trip) that said he would loan me his Titan. Are all block fillers created equally meaning some easier (thinner) to shoot?

Thanks.
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Old 03-23-2020, 10:02 PM   #2
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Re: Spraying block fillers?


You should be able to push block filler with that sprayer. I've sporayed it through my 440, but I thinned it a little bit. Just use a really huge tip, and backroll it with a 1 1/2" or the biggest nap you can find. I use a 629 tip, and squirt it on from about 6 inches away till its dripping down, then roll the crap out of it.

Take any filters out of the pump and gun before doing it, but strain the material, of course.
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Old 03-23-2020, 10:37 PM   #3
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Re: Spraying block fillers?


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Originally Posted by woodco View Post
You should be able to push block filler with that sprayer. I've sporayed it through my 440, but I thinned it a little bit. Just use a really huge tip, and backroll it with a 1 1/2" or the biggest nap you can find. I use a 629 tip, and squirt it on from about 6 inches away till its dripping down, then roll the crap out of it.

Take any filters out of the pump and gun before doing it, but strain the material, of course.
Are all block fillers the same consistency ? This Drylock is thick stuff.
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Old 03-24-2020, 04:58 AM   #4
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Re: Spraying block fillers?


The only pump I've ever used to spray block fill or drylok is the Graco 733. It's stout enough to both support a large tip and spray blockfill unthinned. I have a couple of Titan 660s and never attempted to spray block fill thru them.


For block fill to be effective it needs to be brushed or rolled into the masonry. When I sprayed block fill we'd always back roll it. I'd get a 1"-1.5" roller cover and roll it. IMO it's easiest to just slop the paint on with the roller and then go back before it sets up and re roll it with a drier roller to dress it up.
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Old 03-24-2020, 07:46 AM   #5
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Re: Spraying block fillers?


Quote:
Originally Posted by keenxxx View Post
Are all block fillers the same consistency ? This Drylock is thick stuff.
That, I dont know.
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Old 03-24-2020, 09:23 AM   #6
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Re: Spraying block fillers?


titan 840 can spray block filler. Use 30 mesh filters and put a big tip on there.
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Old 03-25-2020, 04:58 AM   #7
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Re: Spraying block fillers?


If I remember correctly we took the filters out of the gun and pump when we sprayed block fill.
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Old 03-25-2020, 06:43 AM   #8
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Re: Spraying block fillers?


I sprayed Drylock in my Graco 190 airless about 15 years ago and it tore up the seals inside the pump; had to be rebuilt. I took it as a hard lesson learned and have used a roller with Drylock ever since.
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Last edited by Yodaman; 03-25-2020 at 06:48 AM.
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Old Yesterday, 08:58 AM   #9
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Re: Spraying block fillers?


Drylock is actually THINNER than most traditional block fillers. I've always rolled it on, the Drylock that is. First coat is tough, but, the second coat goes on pretty fast. Back in the day, I actually remember BRUSHING on block filler after thinning it down. My dad and I did a restaurant building that way. Remarkably, that old block restaurant didn't require a re-paint for 30 years so it is well worth the effort to get the block filler into the pores using any method that works for you.
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