TSP Crystals - Trisodium Phosphate


SKU: RD10810

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Technical grade

Trisodium phosphate is also known as trisodium orthophosphate, sodium phosphate or TSP. It is a water-soluble salt ,that acts as a cleaning agent and degreaser. TSP is a white, crystalline solid that produces an alkaline solution when mixed with water. A non-sudsing powdered Trisodium Phosphate compound that is formulated for heavy duty cleaning. Preferred by painting and cleaning professionals for removing heavy deposits of greasy grime, smoke, soot stains and chalked paint from walls, woodwork and floors. It is great for removing stains from walls prior to repainting after smoke damage. Removes mildew and mildew stains when mixed with bleach. Also recommended for washing away paint remover sludge.


TSP is suitable for the following usages:

  • Cleaning agent / stain remover/ Degreaser
  • Use for cleaning surfaces prior to painting
  • Use to remove paint, varnish and shellac
  • Cleans paint brushes
  • Mixed with chlorine bleach is excellent for removing mildew on wood without whitening the wood.
  • Boiler cleaning for the precipitation of calcium.
  • Buffering agent to maintain pH in solutions.
  • Emulsifier / Thickener / Sequestrant.

…and many more uses.


  • For General Cleaning: Mix 10g of TSP per litre of warm / hot water. Apply using a damp sponge or cloth or mop to surface and allow a few minutes to work. Rinse thoroughly with clean water and dry.
  • For Heavy Duty Cleaning: To remove heavy grease and oil, mix 15g - 20g of TSP per litre of hot water. Apply to surface and allow a few minutes contact time. Rinse thoroughly. Removing soot from bricks etc: Mix about a cupful of TSP in 5 litres of hot water and scrub surface. Rinse off with clean water.
  • Cleaning Paintwork Prior To Repainting: To remove gloss from existing paint and to open the pores, use a solution of 10g - 15g TSP per litre of warm water. Allow a contact time of 5-10 minutes. Rinse thoroughly and dry before repainting. To ensure complete neutralisation of the TSP solution one can wipe the surface down with a solution of vinegar followed by rinsing with clean water.
  • For Cleaning Decking, Roofs, Driveways etc: Make a solution of 15g TSP per litre of water. Brush or mop onto surface and allow 10 minutes to work. Agitate with a brust to remove soiling and rinse thoroughly with clean water. Always check suitability of solution when using on wooden surface. TSP can darken some wood and raise the grain. If darkening should occur dilute solution 50:50 with water and reduce the contact time significantly.
  • For Moss & Mould Removal: Mix 10g of TSP per litre of water and add 250mls of household bleach. Leave on surface for 30 minutes, agitate with a brush and rinse with clean water.
  • For Paint Removal: Make a solution of 125g TSP per litre of water. Brush solution onto paint and leave for 30 minutes. Remove softened paint with a scrapper. When finished rinse thoroughly with clean water.
  • For Paintbrush Cleaning: Soak brushes in a solution of TSP (20g per litre of water)


UsingTrisodium Phosphate To Clean Before Painting

Even if it’s not necessary to sand or strip a surface, all dirt and grime must be removed. Trisodium Phosphate can remove dirt, grease, soap scum and many more surface contaminates and is probably the most powerful cleaner to use on walls and trim.
Typical surfaces include painted walls, ceilings, wood trim and windows. Trisodium phosphate, also known as TSP, will strip away many years worth of grime leaving a clean and etched surface to maximize the paints adhesion.

TSP Mixing Instructions
Mix 1/4 cup per gallon of very warm water, for a super heavy-duty solution use 1/2 cup. Apply with a sponge and use a scrub pad for heavy deposits. Squeeze excess solution from the sponge and wash from the bottom up.
Allow the cleaning solution to sit on the surface for 1-2 minutes then rinse with warm water. Repeated rinsing might be necessary to remove all the contamination and cleaner. Pay attention to the mixing instructions on the box. Not all products are the same. Strengths can vary between the different manufactures.
If repeated rinsing isn’t for you, try no-rinse TSP instead. This formula isn’t as strong as standard trisodium phosphate, but will do a good job at removing house hold grease and grime. The best part is no rinsing is required when used according to directions.


TSP Warnings and Precautions
Trisodium phosphate is a very strong cleaner and can cause burns when mixed according to directions. Wear rubber gloves, protective clothing and eye protection. Do not allow the trisodium phosphate solution to touch the skin or make contact with your eyes.

Please Note: Strong trisodium phosphate solutions can discolour metals and degloss paint. Do not use on linoleum or similar surfaces. Use great care around stained wood as damage to the finish will occur. Protect adjacent surfaces with plastic and masking tape.


Click here to view MSDS

Click here for Specification Sheet


PLEASE NOTE: This product is not for human or animal consumption.