PVA as a sealer

[ss]

I am about to paint a wall (emulsion) that has a couple of grease stains
on it, would PVA act as a sealer? The 2 spots of grease are about 4 cm
in diameter.

[Phil L]

"ss" <whee...@hotmail.com> wrote in message
news:A3%Ow.1517919$V%3.13...@fx06.am4...

>I am about to paint a wall (emulsion) that has a couple of grease stains on
>it, would PVA act as a sealer? The 2 spots of grease are about 4 cm in
>diameter.
>

You can try it and let us know because my kitchen has a few near my bin that
I want to paint over, I don't know that PVA would stick to grease though -
you may have to sand it a bit first to give it a key.

[Tim Watts]

Give it a scrub first with sugar soap - that takes rather more grease
out than basic detergents.

[Andrew Gabriel]

In article <A3%Ow.1517919$V%3.13...@fx06.am4>,

It might work, but OTOH, if it's sufficiently greasy on the surface
to prevent wetting and some moisture penetration, the PVA might not
stick.

You might also find the emulsion won't stick to the PVA - some won't.

You can get stain sealer, which is probably a better bet. Undercoat
gloss paint used to work very well for this too, but I haven't tried
it since the volatile solvents were largely removed from them.

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]

[ss]

Aha never thought of that and I still have some.

[harryagain]

"ss" <whee...@hotmail.com> wrote in message
news:A3%Ow.1517919$V%3.13...@fx06.am4...

>I am about to paint a wall (emulsion) that has a couple of grease stains on
>it, would PVA act as a sealer? The 2 spots of grease are about 4 cm in
>diameter.

A few years back I thought I'd do this.
The problem was that the emulsion paint didn't "soak into" the wall
afterwards and went on very thin and patchy.
I had to put on several coats. It seems to have stuck OK, no peeling off or
anything.

So unless the surface is crumbly I wouldn't do it.
The paint seems to need the porosity to get a good dense thickness to stick.


I would try to get the grease off with some kind of solvent

[ss]

I am going to try sugar soap and see how it goes.

[stuart noble]

On 20/03/2015 01:23, harryagain wrote:

Washing up liquid is perfectly formulated for kitchen oils and fats

[Tim Watts]

On 21/03/15 11:34, stuart noble wrote:

> Washing up liquid is perfectly formulated for kitchen oils and fats

But from experience, not as vicious as SS.

It's one thing that seems to still work like it should and not been
weakened by eco regs.

[ss]

The ss worked quite well.

[Andrew Gabriel]

In article <kjq0ub-...@squidward.dionic.net>,

Whilst you need to wash off as much as you can (as that's what carries
the dissolved grease away), you will not be able to wash all the cleaner
off. Some SS residue is usually OK to paint over, but I would not be so
sure about washing up liquid residue, and cheaper WU liquids are
sometimes loaded with lots of salt too, a combination which might
end up attracting moisture.

[Ian Jackson]

In message <mekh5j$eif$1...@dont-email.me>, Andrew Gabriel
<and...@cucumber.demon.co.uk> writes

Two suggestions:
Strong caustic soda
Ammonia
--
Ian

[PeterC]

Bit nasty.
If the area affected by the cooking fat isn't too big, perhaps one of those
terpene-based cleansers might do it (the orange-peely stuff).

About 15 years or so ago I was trying to remove splashes of set, old, ghee
but nothing that I had to hand at that place would touch it.
--
Peter.
The gods will stay away
whilst religions hold sway

[stuart noble]

Caustic tends to leave porous surfaces forever deliquescent. Not a good
base for paint.
Sugar soap has contained various things over the years, most of which
behave similarly.