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UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
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#1
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PVA as a sealer
"ss" wrote in message ... 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 |
#2
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PVA as a sealer
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. |
#3
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PVA as a sealer
"ss" wrote in message ... 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. |
#4
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PVA as a sealer
On 20/03/15 20:14, Phil L wrote:
"ss" wrote in message ... 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. Give it a scrub first with sugar soap - that takes rather more grease out than basic detergents. |
#5
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PVA as a sealer
In article ,
ss writes: 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. 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] |
#6
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PVA as a sealer
On 20/03/2015 20:21, Tim Watts wrote:
On 20/03/15 20:14, Phil L wrote: "ss" wrote in message ... 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. Give it a scrub first with sugar soap - that takes rather more grease out than basic detergents. Aha never thought of that and I still have some. |
#7
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PVA as a sealer
On 20/03/2015 01:23, harryagain wrote:
wrote in message ... 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 I am going to try sugar soap and see how it goes. |
#8
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PVA as a sealer
On 20/03/2015 01:23, harryagain wrote:
"ss" wrote in message ... 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 Washing up liquid is perfectly formulated for kitchen oils and fats |
#9
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PVA as a sealer
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. |
#10
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PVA as a sealer
On 21/03/2015 18:41, Tim Watts wrote:
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. The ss worked quite well. |
#11
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PVA as a sealer
In article ,
Tim Watts writes: 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. 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. -- Andrew Gabriel [email address is not usable -- followup in the newsgroup] |
#12
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PVA as a sealer
In message , Andrew Gabriel
writes In article , Tim Watts writes: 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. 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. Two suggestions: Strong caustic soda Ammonia -- Ian |
#13
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PVA as a sealer
On Sun, 22 Mar 2015 20:57:43 +0000, Ian Jackson wrote:
In message , Andrew Gabriel writes In article , Tim Watts writes: 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. 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. Two suggestions: Strong caustic soda Ammonia 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 |
#14
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PVA as a sealer
On 22/03/2015 20:57, Ian Jackson wrote:
In message , Andrew Gabriel writes In article , Tim Watts writes: 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. 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. Two suggestions: Strong caustic soda Ammonia 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. |
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