Using latex over oil based paint has actually mainly been seen as a no-no, and for great reason. Just taking a quick glance at the picture for this blog post will certainly give you an concept of what will certainly take place eexceptionally single time you carry out. Well...maybe not eincredibly time.

So exactly how perform you recognize when it"s safe to use latex paint and once it should be avoided? That will certainly be the topic of conversation for this week"s blog post, however prior to we obtain into all of that, let"s look at why a homeowner could select to usage latex instead of oil in the initially area.

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Latex vs. Oil


Oil-Based Paint (occasionally referred to as "alkyd-based" when artificial resins are used) generallyadheres incredibly well to surencounters because of it"s sreduced drying time, is exceptionally sturdy, and also stain-resistant. The drawbacks to oil finishes are that they frequently have actually an extra pungent odor and higher VOC content, are messier to occupational via and cleanup, do not retain their shade and also gloss as well as latex, can "yellow" and also become brittle as they age.

Water-Based/Latex/Acrylic paints are more well-known bereason they"re simpler to work via and also clean-up, they last much longer, retain their shade and also gloss better than oil, commonly have actually a more tolerable odor, and in a lot of situations they dry much faster to the touch. Latex does have actually it"s cons, in that it lacks the durability of oil in many cases, doesn"t mostly adbelow as well due in component to the quicker drying time, and it shrinks as it dries which have the right to reason previous coatings that are not well-adhered to the surconfront to prematucount fail.

When Should You Use Oil?

Oil-based paint is a safe option as soon as paint over a previous oil finish because it is more foroffering of marginal surchallenge prep so there is much less opportunity for peeling -- however that doesn"t suppose you must skip out on surchallenge prep altogether.

When you want an extremely smooth painted surface -- such as on inner doors, windows, and trim -- oil is a wonderful choice because it has self-leveling properties that will certainly minimize the appearance of brush marks and roller stipple, leaving you through an elegant look.

In applications that speak to for a really resilient finish, as opposed to latex, oil based paints are excellent at resisting abrasion, scratching, scuffing, and just basic abuse. Outdoor metal furniture, steel handrailing, and various other similar surdeals with are great examples of instances wright here homeowners choose its usage.

Oil-based primers for usage on bare wood are most likely my extremely favorite application bereason they administer benefits that no latex product can come cshed to corresponding. If I"m re-paint exterior hardwood clapboard siding, I"ll always have a have the right to or two handy to usage as a spot primer bereason of its remarkable capability to bond to bare hardwood.

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A couple of instances where I try to avoid using oil products are when I"m paint a big internal surchallenge, favor wall surfaces or ceilings, simply because it"s many regularly not necessary and also I do not prefer to resolve the odor and also the cleanup. I additionally choose to steer clear of them when I"m re-painting big exterior surfaces, such as the siding on a home, bereason I recognize that it will not hold up as long as an acrylic-latex between re-paints.

When Can You Use Latex?

It"s primarily great practice to use latex over previously-painted latex on any type of surencounters that expand and contract. Latex paint films are versatile and they relocate via the surfaces underneath of them, so if I use a non-functional coating (which oil is) over a functional one I"m going to end up via issues that you would certainly mean -- namely cracking, alligatoring, and so on.

Latex paints (specifically 100% acrylic paints) are the go-to products for exterior home re-paints because they retain their color and gloss much longer when exposed to the sun. One instance wright here caution should be used as soon as re-painting with latex is as soon as it"s being applied to an older residence that has many type of layers of paint. The difficulty lies in the way that latex dries as opposed to oil. Oil-based assets dry via solvent-evaporation and oxidation, whereas latex dries by solvent-evaporation and coalescence. Those terms don"t necessarily suppose a lot to the average homeowner, however what is important to you to understand is that latex paint shrinks as it dries. So if you have actually old previous coats of paint that are most likely marginally adhered to the substprice -- at least in some spots -- your brand-new latex paint have the right to actually pull them off of the home as it dries.

So How Do You Repaint Over Oil With A Latex Paint?

If you"ve made the decision that a latex topcoat would certainly be ideal for your instance, what are the procedures that should be taken to ensure that it will certainly last?

Clean the surchallenge - Similar to any type of paint task, you need to remove any dirt, grease, and also contaminants from the surchallenge with a great quality degreasing pre-paint cleaner. If this is the exterior of your residence and you arrangement to pressure-wash the surchallenge, you have the right to usage the chemical injector tube on your pressure washer to use the cleaner to the surface. Let the surface thoabout dry before you move on.

Scuff It Up - With a difficult coating like an oil-base finish, it is good practice to abrade the surchallenge via sandpaper, or an electrical sander, to create a profile for the brand-new paint to stick to. After you"ve sanded, be sure to rerelocate the dust from the surchallenge by wiping it dvery own via a damp rag or tack fabric, or rinse it off through a garden hose or push washer if the job is a large exterior surface. Allow it to dry prior to proceeding to the next action.

Prime It - Even after scuff-sanding the surconfront it"s a great principle to add an extra layer of insurance that the latex will certainly bond to the oil by applying a coat of an adhesion-fostering primer that is proper to the situation that you"re working in (internal, exterior, etc.)

Apply Two Coats of Your Finish - Using your approach of option (brush and roller or airmuch less sprayer) use two complete coats of your favorite latex topcoat that"s appropriate to the situation. If it"s an exterior project, pick a high high quality 100% acrylic paint through a good warranty.

How Do I Know If It"s Oil Or Latex?

A straightforward test you deserve to carry out to recognize whether you have actually a latex or an oil end up on your house is to purchase some denatured alcohol, which you can find at your regional hardware store. Apply some to a clean cotton rag and also rub it intensely throughout the surchallenge.

Look at your rag. If you check out paint on the cloth that was rerelocated from the surface you have to be taking care of a latex. Denatured alcohol will reduced and also remove latex but not oil based paint.