Best Cleaners Before Painting of 2026

A prepaint cleaner earns its place by removing the second step, not adding one. Krud Kutter PC326 is the one we reach for when we want to go from wiping down trim to opening the paint can without a rinse bucket in between. It is a water-based prepaint cleaner and TSP substitute that cleans and etches the surface, and the label lets you paint after 10 minutes—or as long as a week later.

That window matters on a cabinet job. We put it through a cabinet-front prep and a pass over painted trim, and the spray-and-wipe routine kept things moving; there is no mixing, no grit to dissolve, and no waiting for a bucket of TSP to do its work. The etch is the part we care about most on a previously painted surface, because a clean wall that still has gloss can send paint sideways. PC326 is made for that handoff, and it is safe on paints, varnish, lacquer, and polyurethane.

The cleanup is another point in its favor. A no-rinse product leaves less water on drywall and less chance of soaking the edge of a cabinet box. The 32-ounce spray bottle is easy to keep in a prep caddy, and the paint window is generous enough for a weekend project that runs long. For a whole-house prep job, that is a fair exchange for skipping a rinse.

The box is the first surprise. Savogran TSP is a one-pound bag of powder, and it can arrive as a brick rather than a loose powder, so plan to break it up before you mix.

Once it dissolves, it is the heaviest cleaner in this group. We reach for it when kitchen grease, cigarette smoke, or years of grime have soaked into the paint, because TSP cuts through the kind of soil that a ready-to-use spray only moves around. It is non-sudsing, so it rinses cleanly, and a little goes a long way; one bag handles more prep than the size suggests. It is also useful on painted cabinets, dingy walls, and exterior siding, which makes it a good bag to keep for projects beyond a single room.

The catch is that this is old-school chemistry. It is not the product we hand to someone who wants to wipe a wall and start painting in ten minutes; it is the one we choose when the surface is genuinely dirty and we have time to do the prep properly. For a kitchen with a greasy film or a room that smelled of smoke, that strength is the reason we keep a bag on the shelf. We also like that it does not add a perfume to the room; the point is to remove the smell, not cover it.

Dilution is the whole point of the Zep gallon. The label gives three strengths—three ounces per 32 ounces of water for light soil, six for medium, and full strength for tough jobs—so one jug can cover a whole house without three different bottles. That is the kind of economy that matters when the prep is the least glamorous part of a repaint.

That range is what makes it useful for a paint-prep bucket. A weak mix is enough for dusty trim and painted doors, and you can step up to full strength for a greasy range hood or the top of a kitchen cabinet. It is a concentrated all-purpose degreaser, not a dedicated prepaint etch, so it cleans but does not dull a glossy finish.

For a small cabinet refresh, a ready-to-use spray is simpler; for a whole-house prep, the gallon is the smarter buy. We keep it for the broad middle of the job, where the surface is dirty but not coated in baked-on grease. The jug is also easy to store and decant into a spray bottle for detail work.

Simple Green Pro HD comes in a gallon and is meant to be diluted for floors, walls, equipment, and appliances. The label calls it non-corrosive and professional-grade, and the unscented formula is a change from the perfumed all-purpose cleaners that dominate the shelf. It is a concentrate, so the gallon goes further than the bottle size suggests.

We reach for it on big painted surfaces because it is strong enough for grime but not as aggressive as TSP. On a wall that is dusty and slightly greasy, it does the job without the caustic feel of a phosphate cleaner, and the lack of scent makes it easier to work in a closed hallway. It is also safe on metal, which matters if you are prepping a painted metal door or a piece of furniture with hardware.

The gallon is the other advantage. Diluted for everyday prep, it lasts through a room-by-room repaint, and you are not stopping to buy another trigger spray halfway through. We keep it for the broad middle of a prep job, where the surface is dirty but not a restoration project.

The cabinet door you do not want to sand is exactly where a wipe earns its keep. Heirloom Traditions Deglosser Surface Prep Wipes are pre-moistened with a liquid sandpaper formula, so you can work a small area without setting up a sanding station. It is also a different product from a cleaner: the wipe is for dulling the finish, not for cutting grease.

The format is the useful part. A wipe gets into the recessed panel, the edge profile, and the corners where a sanding block is awkward, and there is no bottle to tip or rag to rinse. The wipes are wet enough to leave a visible film without dripping, and the textured sheet gives a little bite on a satin finish. We used them on cabinet fronts and trim, and the surface was ready for paint after it dried.

What we appreciate most is the control. You can work one door at a time, let it dry, and see the surface change before you move on. That makes it a comfortable choice for a first cabinet project, where sanding a whole kitchen feels like a commitment. It is also a tidy way to prep a piece of furniture in a spare room, because there is no dust cloud and no electric sander.

A trigger spray is not a glamorous purchase, but it is the one we grab for a quick cabinet wipe-down. Krud Kutter Original is ready to use, cuts grease and wax, and carries an EPA Safer Choice certification, so it is a comfortable choice for indoor prep. The formula is water-based and leaves no residue, which is the main thing you want before paint.

A quick pass on painted cabinet fronts and a greasy range hood showed why the trigger matters. Spray, give it a moment, wipe, and move on; there is no bucket and no dilution math. The spray is also easy to direct at the greasy spot above a stove or the finger marks around a handle, rather than flooding the whole door.

The value question is where we pause. For light kitchen grease and everyday grime, it is a sensible ready-to-use spray. For a whole room of smoke-stained walls, a concentrate or TSP goes further for the money. We keep the trigger bottle for small jobs and spot prep, not for the entire house.

The bundle is the pitch: a 24-ounce spray bottle plus a 64-ounce refill. La's Totally Awesome All Purpose Cleaner & Degreaser is a budget-minded way to keep a spray bottle filled for kitchen cabinets, walls, and floors. The refill keeps the spray bottle in rotation instead of sending you back to the store.

It is a true all-purpose cleaner, not a dedicated prepaint etch. The formula is free of ammonia, bleach, and phosphorus, and it cuts kitchen grease well enough for the top of a fridge or the cabinet run above a stove. We like the refill because the spray bottle stays on the job while the jug sits in the pantry, and the spray is easy to aim at the greasy spot above a stove.

On a painted wall, we treat it as a cleaner first and a prep product second. It removes the surface film, but it does not dull gloss, so a high-gloss door still needs a deglosser or a light sand. For a rental kitchen or a quick refresh, that is a fair trade.

We still think the bundle makes sense for a budget-conscious whole-room clean. It is not the product we choose for a formal cabinet repaint, where a dedicated prepaint cleaner or deglosser earns its keep. But for the messy, everyday version of prep—the rental kitchen, the mudroom, the garage shelf—it is easy to justify.

The gentler end of prep is where Simple Green's 64-ounce concentrate fits. It is an EPA Safer Choice all-purpose cleaner, and the sassafras scent is mild enough that you can use it on a refrigerator or a painted door without clearing the room. It is also a concentrate, so the bottle dilutes into more cleaner than the size suggests.

We like it for light soil: dust, fingerprints, food splatter, and the general film that builds up on painted walls. Mixed at the weaker end of the label's range, it wipes clean without leaving a streak, and it is safe for fabrics, carpets, floors, and vehicles as well as painted surfaces. That breadth is useful when a prep job moves from the wall to the floor to the car.

It is not a heavy degreaser. On a greasy range hood or a smoke-stained ceiling, it does not have the bite of TSP or a dedicated kitchen degreaser, and you will work harder for the same result. We keep it for the final wipe-down after the heavy cleaning is done, or for a room that is dirty but not coated.

For light prep and everyday cleaning, the concentrate is a good fit. It is the bottle we reach for when the walls are dusty and the cabinets only need a wipe, not when the kitchen has years of grease. That distinction matters more than the dilution ratio on the label.