Latest Discussions : Painting


02:34PM | 10/07/13
Had a certain unmentionable named store mix us some exterior paint samples. We had them make us a few gallons of exterior paint and primer and one. When we ran out of those first 3 gallons we had them make us a lot more. Now that we are almost done painting the house down to the last gallon I notice the outside Of the paint can says interior paint!!!!!!!! Which means we painted 90% of the outside of our house with interior paint because of their mistake and me not noticing it. It is latex water-based paint, Painted on the wood and stucco. We live in sunny Southern California.
Now what do we do?


01:14PM | 10/09/13
The chemical difference between interior and exterior latex paints is minimal, and the primary variant is the amount of pigment with exterior having a lot more. For the stucco portions of your house, latex paint is the appropriate choice and the greatest detriment your accidental paint formula will experience is fading color. If you decide to paint it again in the future, never use oil based paint on top of latex. It will flake off because latex breathes and oil does not. For the exterior wood, since it expands and contracts readily, the paint may peel off sooner than you'd like, in which case, it will come off easily and the surface can be repainted. Again, the more likely result will be the color quickly fading.


02:10PM | 08/09/14
I believe you have it wrong. You can't paint latex over oil, the latex will start peeling if bumped.


05:43PM | 04/26/15
It's been over a year since you've had this problem (interior paint used on exterior). How does it look now? I have the same problem but a much smaller scale.


12:24AM | 09/18/15
well your post is old news now, however here's some expert knowledge...exterior paint is designed to withstand the elements better, so I would have just run a quick coat of exterior over the interior paint you applied, and as long as the prep/ priming was done correctly there wouldn't be a problem: the interior paint would bond and cure to the material, then the exterior paint would bond to the interior paint and it would have the extra protectants...if the paint job still is in good shape I would still run a coat of exterior paint over it.
Oil base...never ever ever ever ever ever ever ever ever ever ever ever use it!!!! I hope I was clear. Back in the day oil used to contain lead so it was "da bomb", now it's just a pain in the ass, and w/ technology in paints and primers theres no reason to use oil...that being said you can put oil on top of anything, even latex paint, and it will stick...(if it wouldn't then why would they have oil base primers like kill..and oil base primer is the only thing that will seal a stain out) CANNOT put latex on top of oil UNLESS you actually used an oil base primer like kill 1st otherwise it peel off in a heart beat


01:03PM | 10/07/15
you guys are oh so wrong. you can put latex over oil. not the opposite.


03:32PM | 11/30/15
Hate to tell you bud but you can not or should not put latex over oil but you can oil over latex


11:57AM | 12/09/15
I was always taught that latex over oil base is ok. Not oil base paint over latex. Mostly because the oil base will soak into the wood better. And then the latex will make like a nice rubberized coating over it.


08:04PM | 12/12/15
Obviously latex over oil is OK. There are plenty of oil based primers that are recommended as a first coat over wood, to be followed by latex. Water based primers do not recommend finish coating with oil paint however.

This is not conjecture - just go read the recommendations on any oil based or water based primer.


04:21PM | 02/10/16
Latex over oil is absolutely correct. The best way to paint bare wood is use oil primer and latex top coat! I don't know if any of the comments are from a pro here (obviously not!)but you can always put latex over oil, rarely do you put oil over latex! I have panted Fascia boards with Oil Primer and Latex Top coat and 16 years later it is in great condition!


09:47PM | 03/07/16
Oh My God!!!!!!!!!!!
Shame on You for not paying attention!! At our local (BOX STORE) one of the girls that work in the paint department has to ask idiots like you three times interior/exterior, satin/flat etc. because she knows how ignorant some people are!The fact that you didn't notice until your third trip and fourth gallon makes you militantly ignorant!!
I can only hope you didn't make the store pay for your paint even worse the employee pay for your sins!
Next time buy a pair of glasses that come with a brain or hire a professional.


08:40PM | 03/20/16
Go for and be stupid and put and put latex paint over oil based and watch it fish eye and peel all painters know this. For exterior you can only oil base prime then top coat with latex paint or oil based paint. If going over oil based paint you have to sand and reprime with a primer usually like a late kiltz 2 or a pro block ect... then top coat with latex. Like what was said earlier top coat with exterior paint.


06:54AM | 03/30/16
Another reason to stay away from oil based paint- white oil based paint will yellow with time. (Also, I lightly sanded our oil-based painted bookcases and painted with latex. It has been 10 plus years with NO problems, no peeling or chipping! End of argument.


07:58AM | 06/27/16
I've been reading this thread and wanted to share my knowledge. I've been in the industry for 20 years. I'm operations manager for a industrial and commercial painting contractor in south carolina with over 50 employees. Most everyone on this thread has some right but some wrong. There is more to painting than just slapping it on. You must have knowledge of what your doing or don't do it. This is why contractors exist. If you plan to go over an oil based finish with a latex paint you must prime with an oil based primer first. I think the confusion of being able to paint over oil with latex is because of this. It's fine to go over oil primer with latex but never ever go over an oil finish with latex. I'd always go with the advice of the guy that said just don't use oil. It creates a mess. I always try to get our customers to change to latex if they have oil on anything. These days they make latex that is just as good or better than oil based. If you are wondering and not sure what you have on the surfaces your trying to paint you can do a test to see. All you have to do is get a rag, put some denatured alcohol on it and rub the area lightly. If the paint softens and and starts to rub off that means it's latex. If it doesn't budge you have oil. I don't believe in calling people ignorant in their lack of knowledge but would rather teach them. Hope this information helps.


12:29PM | 07/27/16
BV012069- IF there as a vote for best answer you would have it. And as for the ignorant individual that must work in a box store as a manager, I am sure you were just taking out your pent up frustrations. The original poster took some blame, but there is fault on both parties.

Regardless, as BV012069 states, if all else fails, read the directions, contact the company/manufacturer of the product you intend to use. Also the poster provided a test so you know the type of existing paint you have on a surface.

BTW...I recently made a similar mistake, but it was painting INSIDE a garage with a latex paint. No worries as far as I am concerned though, again, because it is inside a garage, on stucco some of which has sun light and others areas that don't, it actually worked out well for me.


01:01AM | 04/22/18
I've been a painter for almost thirty years and I want to set the record straight. If you have a surface that is painted with oil-base paint, the ONLY way you can repaint that surface using latex is if you first prime it with oil-base primer/ stain lock sealer. Otherwise, the latex paint won't adhere and your fresh new paint job will soon start peeling off. Proving to everyone for years that you're no painter!


12:07PM | 06/05/19
4 years of art school, you can put oil over acrylic, but not acrylic over oil. Latex can go over oil if it is not semi-gloss, then only if you sand the surface. Oil goes over latex. Semi-gloss anything should be lightly sanded before putting anything over it. Semi-gloss is slick, so nothing will stick perfectly except another Semi-gloss.


01:05PM | 06/07/19
Was BV010810 born an asshole or did he have to work at it? What a LOSER.....


01:00PM | 06/16/19
What do you guys say we all get together and paint each other up??


04:14PM | 07/01/19
I really hope this asshole forgets to check his van sometime.


07:24PM | 07/10/19
Seems like a long discussion about using latex over oil and vice versa. This is cool and all but the question posted by OP was whether or not interior paint will be okay if used outside. I think only the first person who replied actually addressed the question so kudos to that person! I came here wondering the same thing. I painting some railing and I'm almost out of the exterior latex I was using. Instead of spending an hour to drive to Lowes to get more of it, I am curious if I could just switch to the full gallon of interior BMoore Alkyd I have. I was going to do two-three coats anyway so I'm thinking it will be durable enough. It's white too so there's not much color that can fade.


06:36PM | 08/05/19
I bought an older home (built 1947) three years ago. To make things look fresh, the previous owner painted the trim, baseboards, interior doors, etc. Within one week of moving in, the LATEX OVER OIL paint was peeling off. This could’ve all been avoided if the previous owner had properly prepared the surfaces. To see if paint is oil or latex, buy some denatured alcohol, available at your local drug store, and swipe some on suspect surface. If you see paint, you have latex...if you don’t see paint on the rag, it’s oil.


12:06PM | 09/22/19
This whole thing is soooooo STUPID. Very simple, interior paint is for INSIDE, Exterior is for OUTSIDE. Used latex over latex and oil over oil. If you must change oil to latex SAND AND PRIME.


01:16PM | 10/03/19
??? I am not a painter. and asking for a Can you prime...not and exterior door (full sun) with interior paint. then paint over it in your exterior paint. The exterior door is currently dark I just do not want the lighter color to be less vibrant due to this, and thought I could prime it. But I do not want to go back to the store if I do not have too.


01:06AM | 10/05/19
Oh dear boys...need to listen to an old Aussie chook with 40 years renovating houses. I have a heap of interior water based paint and need to re paint the exterior of a fiber (concrete board) shed. You need to know the 'mystery' of the chemical makeup of paint. The manufacturers keep those secrets in nuclear safe bunkers. I am going to paint this shed with the interior based paint and chuck in 100ml/4L of 100% UV sunscreen. Did this before and it didn't fade.


04:45PM | 01/22/20
I have been painting for 92 years and you all have it wrong... you can use latex over oil, if you mix in a little of the oil based paint in with the latex and then seal it up and let the can rest upside down overnight.
You can do the same with interior over exterior.
This lets the two types of paint get acquainted together and they won’t bicker once you paint them together on the same house. You must acquaint before you paint
Hope this clears up the confusion all these amateurs have been spewing in this thread


11:38PM | 01/25/20
Meh. Paint is paint. Does it look good? Great. Move on.


07:10AM | 03/13/20
Hey BV009161 you are 100% correct. Ive been painting for almost 30yrs. You CAN NOT put oil over latex. You CAN put latex over oil. However you have to put 1 coat of primer, and that CAN also be LATEX, such as Gripper, or latex Killz. So just know you are 100% correct. And as far as nterior outside, if its in a covered area, you can. As long as ya spend $4 and get a mildew additive to mix in and itll be good. You can do the same in uncovered areas but by the 2nd yr you will see major fading. If ya live in an area with 4 seasons like up north, midwest etc.. Where its nothot sun 75% of the year, may last another year. BUT the mildew additive is a 100% requirement as that would be the 1st major breakdown to using it.


11:36AM | 03/29/20
Y’all made us laugh. Makes a great story. Thanks


01:56AM | 05/08/20
Lemon after tequila. Not before


04:45PM | 07/03/20
I agree with the person that broke it down. Also that person said something else that I believe to be so true. You should never put anyone down. Anyone can make a mistake. It is always better to teach. Putting someone down shows you aren't as smart as you think you are.


07:10PM | 08/03/20
Too funny!!! Learned stuff about paint, people and laughter...yep a joke book for do it yourselfers...


07:43PM | 10/31/20
Color me stupid. I just painted a dog house with interior paint. I told the guy in the store I needed exterior paint, in the color my wife picked out. We even got the base together. At some point he realized the base wouldn't work for that color so he switch to BM paint. He grabbed some interior base and mixed it up, while we discussed the dog house I was building. I got home didn't even think to check if he gave me exterior paint. I just put it on. I noticed after the fact. I came here looking for advice...
I will probably sand it and cover it with exterior paint. But I might just let it fade.


08:13AM | 11/06/20
And yes, you can put oil base over latex.
If you put latex paint over oil base top coat/finish coat (that's not a primer, IT WILL NOT STICK, it will peel off. Hell, you can scratch it off with your finger nail.


07:29PM | 12/06/20
Painter put latex over oil based trim. Flaking everywhere. Looks like it is snowing.


01:08PM | 02/08/21
I asked my professional painters to leave behind the leftover paint so I could use it for touch ups. I just looked over the label and discovered it states interior eggshell enamel paint and primer. I have had issues with painters using cheap paint before and having flaking occur. I requested that these painters use the good brand of Behr that would avoid this issue. My concern now that I’ve discovered this says it’s interior is will this paint now flake? Also feeding is not an issue since it’s a very light color. Should I go over it with exterior paint? Or because it says enamel will this work? I do not want things to flake or wear out again as it caused several issues With rot entering wood. Thank you for any input or help.


07:40AM | 03/12/21
Who cares if it lasts for 10 years or 20. Sun is going to fade it all out anyway not to mention your color is going to change your going to want a new color so your going to repaint anyway. So go for it just have fun and enjoy how good it looks. As for the rest of these ppl who cares what they think. Rant over


12:02PM | 03/14/21
I didn't know I had bought interior paint for my planter until i was half way thru painting it. My planter sits on my porch which has an awning over it. Will I have problems with it fading or chipping?


11:25PM | 05/02/21
Seems to me like if you clearly asked them for exterior paint, that is probably what they gave you. The error was probably in putting the paint in the incorrectly labeled container. Therefore you don't have to be concerned about the paint chipping or fading. It is likely outdoor paint and everything will be just fine.


07:53PM | 09/06/21
BV010810, you are rude as hell


11:08PM | 09/30/21
I’ve been a paint for 35 years. I won the very first American painting contractor contest sponsored by Zinser, and the prize was $5000, but half was to be paid in product. I chose Bin 123 primer.
So with untold 5 gallon buckets worth of primer, I just had to trust that it would work as a primer with a latex top coat. My area was filled with turn of the century homes. My crew and I used that primer on every house we took on, scraping, sanding (you could do it back them, and spot priming with Bin 123. I had a really good success with every house, that 20-25 years later, same clients had me back.
So some primers are better than others, and Bin 123 is now part of every house painting job.

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