Circle stain bathroom ceiling:Zinnser B-I-N?

[Flah7687]

Hi,

I have a circle stain on a bathroom ceiling. Photo attached. Have in recent days had it painted over on 2 consecutive days with Matt paint. But stain is still showing through.I think painter used some kind of wood glue to prime before the paint was applied.

I have heard that Zinnser B-I-N is good but not sure which to apply out of the spray and the tin (photos of both attached). As my painter is charging per hour the spray option sounds good

Question: should I ask painter to apply the Zinnser spray and then wait 45 minutes and then apply another coat of the Zinnser spray? Or does it need more sprays of the Zinnser spray? If so how long do I wait after I apply the second coat of Zinsser spray before I apply the third. How many days do I then wait after the Zinnser spray has been applied before I apply the white paint?

Best regards and many thanks

[dewaltdisney]

Zinsser Bin is a shellac based product and you can recoat in half an hour as it dries quickly. The spray version is also shellac based but easier to apply as a spot stain cover. Do it yourself, it is easy to gently spray the area affected. Quite frankly you could do the whole job yourself if you are mobile enough to be able, we can always advise you on the process and you can save money. As a point never agree to hourly rates, get a job price as it leaves the door open to spinning the hours.

DWD

[toolbox]

Zinsser is top stuff, but i is inclined to flash (be seen through the top coat) because it is smother and less absorbent than the emulsion.
Best to apply with the same kind of tool (brush, roller, pad) and give it a couple of extra coats of emulsion before painting the full ceiling.

[Flah7687]

Thanks. Mobility is indeed an issue for me. I wonder how I know whether I need to apply the 3rd coat of spray. And how long I should wait between the second coat and the third coat of Zinsser spray. Is it the case that the indicator of whether I should apply a third/fourth set of Zinsser spray is if the stain becomes invisible or not? Also after I apply the final Zinsser spray how long do I need to wait before I apply the paint coat?
Best regards

Best regards

[Flah7687]

Thanks. Just to clarify do you mean apply the Zinsser spray with the same kind of tool (brush roller pad as the) tool I use for the emulsion paint?

Also, do you have a view as to how I know of enough Zinsser coats have been applied? Is it because the stain becomes invisible? Many thanks

[dewaltdisney]

The spray is fairly obvious. Don't go mad do one light pass and then another when it is dry. This should be sufficient. What the Zinsser does is seal the stain from bleeding through. As Toobox says the emulsion finish coats can sit on the shellac but your decorator should know how to deal with any flashing.

DWD

[Grendel]

Just to add with the zinseer spray, it says on the tin to turn upside down and spray to clear the nozzle after use. Follow that instruction , I leant my daughter a can and she didn't and it blocked the nozzle. Nearly a full can too...

[toolbox]

The spray is easy but I tend to use the tin and a small roller, usually chuck it rather than clean.
If you need to clean off BIN methalated spirits is the solvent

[Flah7687]

Hi,

If I may ask one last question….before I go out and buy the Zinsser B-I-N spray…: I still have
some of the white matt paint that the contractor applied a couple of coats of (above the wood glue which was used as a sealant). So Part of me is thinking to apply 3 coats on consecutive days (I’m going to be brave and if I do it try myself rather than call someone in) and see if that takes away the stains. And if it doesn’t then go down the route of the Zinnser two coats and then coats of Matt. Would that be sensible or maybe it isn’t at all. I am a bit of a novice. Would be grateful for any thoughts?

[toolbox]

Go for two coats of zinsser the stain may even bleed through the first coat. Then you can try just painting the area with top coat feathering it in to the surrounding ceiling depends how log ago it was painted as paint tends to yellow overtime. Just over painting I can almost guarantee will bleed through.

[Flah7687]

Another question (apologies a novice here) - I suppose I should spray the Zinsser BIN not in a ring (which is what the water stain is) but rather spray all over the area including the inside of the ring. Maybe so it is a rectangle area I have sprayed?

I suppose for a small area like the one in my original photo the spraying time would be maybe 10 seconds or do you do it for a minute or longer?

And the instructions say the second spray is 45 minutes later. How long do I then wait after the second spray before I apply the Matt paint?

Best regards and thank you so much.

[dewaltdisney]

Have a look at this video, I think you will find it useful https://www.youtube.com/watch?v=wk6tpkC8fOI Note the short burst spray method. Just spray the area gently do not worry about the shape of the area an irregular pattern is easier to blend. Do a couple of coats and then decide if it is opaque enough to cover the stain. Everyone starts as a novice, you have the benefit of YouTube which is an excellent guidance tool. Once you have built up your confidence there is no reason why you cannot take on decorating your home yourself, you can always float your ideas on here.

DWD

[Flah7687]

Hi, update: I had my painter spray the Zinsser-BIN twice on the stained area (45 minutes apart) and the stain is hardly visible. I tried to take a photo of it to show you and it cannot even be seen in that. But if I look really really closely I can just about make out a circle. Wonder if I should tomorrow apply a third Zinsser spray….or merely go for the matt paint coat. Best regards

[dewaltdisney]

The spray coats are quite thin if you think it needs another, the top coats will probably cover it, as the shellac seals it well.

DWD