Block filler - what's your favourite?

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Old 03-31-14, 01:50 PM
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Block filler - what's your favourite?

I usually use SW or Dulux. I find they both actually do better if you add a cup or two of water per 5 gallons. 20 mil sleeve is also what I usually use.
That being said, if I want it to be pinhole free, I'm looking at a minimum of 2 coats of block filler, then 2 finish. Sometimes it needs even more.

Normally, it doesn't have to eat pinhole free. But, for example, a blocked up doorway in a school where either side of the door has 40 years worth of paint built up, pinhole free is basically what it needs.

So, what do you like to use and why?
 
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Old 03-31-14, 02:00 PM
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I've never paid a lot of attention to the different brands. Some do seem to work a little better if thinned slightly but you got to be careful because too much thinning negates the block filling effect. I don't know that I've ever had to apply a 2nd coat of block fill unless it was going behind someone that didn't do it right to start with. I know what you are saying about making new block blend with old painted block.

I'm metric illiterate but I normally use 1"-1.5" nap when painting masonry.
 
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Old 03-31-14, 05:32 PM
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What kind of block do they have where you are?

Lately, aside from one job where they actually reclaimed old block from somewhere in the states (tax payers paid to ship it to Canada lol), it's all 'lightweight' block. It's got a completely different look/texture to it and it's a pain in the butt to fill.
 
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Old 04-01-14, 05:17 AM
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When I painted in fla they used a very tight pore concrete block, probably because of all the wind driven rain. Here in tenn the block is a lot more porous. They were selling both cinder block and concrete block with except for weight/color it's hard to tell the difference. Both weigh considerably less than the block further south. I haven't bought any block in about 10 yrs so I'm not sure if they still sell the cinder block.

Locally we don't have many painted block exteriors, they usually get stucco, so most of the block fill I've applied up here has been on interior basement/garage walls where I usually use Drylok for the block fill.
 
 

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