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 Post subject: water base stains
PostPosted: Sun Oct 01, 2017 4:49 pm 
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We have water stains on wall and celiing.

All dried up but stains does not go after appying matt paint.

Shoud l use Zinseer 123 or Polycell Trade Stain Blocker.

Which one works best?

Thanks for all help.


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 Post subject: Re: water base stains
PostPosted: Sun Oct 01, 2017 6:05 pm 
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I'd be more inclined to go with Zinsser Coverstain or oil undercoat. Coverstain dries far quicker, and is more effective, but undercoat will do at a push. :thumbright:

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 Post subject: Re: water base stains
PostPosted: Sun Oct 01, 2017 6:50 pm 
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123 plus is the better one. I'd always follow Dynamods advice.



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 Post subject: Re: water base stains
PostPosted: Sun Oct 01, 2017 7:29 pm 
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Thank you, kind sir :salute:

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 Post subject: Re: water base stains
PostPosted: Mon Oct 02, 2017 12:10 am 
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:?

But the advice was to use coverstain not 123 ... whatever.

:-)


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 Post subject: Re: water base stains
PostPosted: Mon Oct 02, 2017 8:00 am 
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OchAye wrote:
:?

But the advice was to use coverstain not 123 ... whatever.

:-)


The original question was " Should I use Zinsser 123 or Polycell Trade stain blocker"

Using Zinsser 123 would be a mistake for water stains whereas Zinsser 123 plus has more weight to it as a stain block so that was some help for mane.

For personnel reasons I'd have used 123 plus (Asthma) but I advised to go with Dynas advice due to his vast experience.

Hope this helps you Ochaye.



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 Post subject: Re: water base stains
PostPosted: Mon Oct 02, 2017 6:49 pm 
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Desmondo15 wrote:
Hope this helps you Ochaye.


Yup :salute:



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 Post subject: Re: water base stains
PostPosted: Thu Oct 05, 2017 5:59 pm 
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I used zinser 123.....

should I do prime before applying dulux matt absolute white emulsion

or should I put prime first?

I have Benjamin Morore primer at home so can try that.

On the wall I have to use Dulux eggshell so not sure how eggshel paint will work on top of Zinser 123?

thanks for all help


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 Post subject: Re: water base stains
PostPosted: Thu Oct 05, 2017 6:10 pm 
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1-2-3 isn't a stain block. You need something with more body. BIN will work as will Allcoat (Both Zinsser products) or an oilbased undercoat (probably the cheapest option)

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 Post subject: Re: water base stains
PostPosted: Thu Oct 05, 2017 6:16 pm 
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should I sand down 123 and then apply BIN?

single or double application of BIN?

I heard flashing issue with BIN.

Should I prime after BIN ?


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 Post subject: Re: water base stains
PostPosted: Thu Oct 05, 2017 6:28 pm 
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Just go over existing with a good stain block no need to sand.

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 Post subject: Re: water base stains
PostPosted: Thu Oct 05, 2017 6:33 pm 
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I have ZIN spray based so will give a go?

I hope I will not get flashing issues with it.


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 Post subject: Re: water base stains
PostPosted: Thu Oct 05, 2017 6:42 pm 
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Should be OK if you use a decent trade paint over, may need 2 coats.

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 Post subject: Re: water base stains
PostPosted: Thu Oct 05, 2017 6:44 pm 
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123 plus is the water stain option and would work fine. Any coating on top, same with BIN which is more heavy duty but very smelly and harder to apply.
They all have their merits, 123 will do tar, it's got the same resin as Allcoat but it's not so good for water stains.
Zinsser also do a solvent based primer and finish that covers a whole list of stuff which is also extremely low odour so there's lots of choice.

There's more than one way.

A oil based undercoat to be fair may yellow.


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 Post subject: Re: water base stains
PostPosted: Thu Oct 05, 2017 6:54 pm 
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I have BIN at home, it is spray one. Just done one coat.

may do another in 30 mins

should i then apply dulux paint ?


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