How to Use TSP Cleaner Before Painting Cabinets

TSP (trisodium phosphate) is a heavy-duty degreasing cleaner that's become a standard recommendation in cabinet painting prep specifically because kitchen cabinets accumulate cooking grease that standard household cleaners often don't fully remove — and any residual grease is a genuine paint adhesion problem, as covered elsewhere on this site.

1. Why TSP specifically, rather than a standard cleaner

TSP's strong degreasing action cuts through cooked-on grease and grime more effectively than most general household cleaners — kitchen cabinets, especially those near the stove, often have more embedded grease than is visually obvious, and TSP is formulated to address exactly this kind of buildup.

2. Mixing TSP according to package instructions

TSP is typically sold as a powder to be mixed with water at a specific ratio for cleaning purposes — following the product's specific mixing instructions (rather than guessing at concentration) gives an effective cleaning solution without excessive residue from an overly strong mixture.

3. Wearing appropriate protection while using TSP

TSP is a fairly strong alkaline cleaner, and gloves and eye protection are a reasonable precaution during use, along with good ventilation, following general safe-handling practice for any strong cleaning chemical.

4. Applying and rinsing thoroughly

1. Mix TSP solution per package instructions
2. Apply to cabinet surfaces with a sponge or cloth, working into any
   visibly greasy areas
3. Rinse thoroughly with clean water to remove all TSP residue
4. Dry completely before proceeding to sanding and priming

5. Why thorough rinsing is essential

Leftover TSP residue on the surface can itself interfere with paint adhesion, similar to how grease residue would — thorough rinsing with clean water, and allowing the surface to dry completely, ensures the TSP has done its cleaning job without leaving a new adhesion problem behind.

6. TSP alternatives for those preferring not to use it

TSP-substitute products (formulated without the phosphate, for areas with phosphate restrictions, or simply as an alternative) offer similar degreasing power for those who prefer to avoid the original TSP formulation — checking that a substitute product is genuinely comparable in degreasing strength matters if switching from TSP for environmental or availability reasons.

7. TSP cleaning is one step in a complete cabinet prep process

TSP cleaning addresses the grease and grime specifically, but it's one part of the complete cabinet painting prep process covered elsewhere on this site (also including sanding, bonding primer, and a cabinet-rated topcoat) — thorough cleaning alone doesn't replace the other prep steps needed for a durable cabinet paint job.