Cleaning Surfaces

 

Interior ceilings and walls must be cleaned before they are repainted, even if they already look clean.

Interior ceilings and walls must be cleaned before they are repainted, even if they already look clean. For example, the process of cooking food leaves fat deposits on kitchen walls, cabinets and ceilings. Dust builds up on door tops and window frames. Furthermore, each time we touch a piece of furniture, a wall or some woodwork, we leave behind a bit of natural oil from our skin.

The presence of various indoor contaminants diminishes the ability of coating to adhere. Consequently, surfaces must be cleaned before they are painted. The following pages describe how to use such cleaning products indoors. Check the Cleaning Product Selection Table to determine which cleaners to use.

Learn how to:

To remove dirt and dust from walls:

Checklist

  • Bucket
  • Scouring sponge
  • Polyprep Cleaner with active oxygen 771-135 (liquid) or 771-136 (powder)
  1. Add 60 grams of cleaner per litre of warm water.
  2. Rub surface vigorously and start from the bottom to avoid runs.
  3. Let solution work for 2 to 3 minutes.
  4. Rinse with clean water.


To remove wax, soap, grease, oil and mildew:

Checklist

  • Bucket
  • Scouring sponge
  • Polyprep Cleaner with active oxygen 771-135 (liquid) or 771-136 (powder)
  1. Add 60 grams of cleaner per litre of warm water.
  2. Rub surface vigorously, and let solution work for 5 to 10 minutes.
  3. Rinse with clean water.
  4. Repeat as needed.

 

Removing grease, wax, oil and tar stains:

Checklist

  • Rubber boots and gloves
  • Clean, dry, lint-free cloths
  • Polyprep Cleaner with active oxygen 771-135 (liquid) or 771-136 (powder)
  1. Add 60 grams of cleaner per litre of warm water.
  2. Rub surface vigorously and let it soak for 20 to 30 minutes.
  3. Rinse with clean water.
  4. Repeat if needed.

Removing grease stains from concrete floors:

Checklist

  • Rubber boots and gloves
  • Broom
  • Sawdust
  • Polyprep Cleaner with active oxygen 771-136 (powder)
  • Polyprep thinner 875-104
  1. Soak dry sawdust in Polyprep 875-104 thinner.
  2. Cover stains with mixture, leave overnight and sweep up the next day.
  3. Repeat as needed.
  4. Wash surface with the cleaner.

Removing and killing mildew:

Checklist

  • Rubber boots and gloves
  • Goggles
  • Bucket
  • Stiff bristle brush
  • Comfortable old clothes
  • Insecticide sprayer
  • Scouring sponge
  • Bleach (product not sold by Sico)
  1. Put on rubber gloves.
  2. Pour 1 litre of bleach and 3 litres of warm water into a bucket or an insecticide sprayer.
  3. Apply solution to the surface, starting from the bottom to prevent runs.
  4. Rub surface with a stiff bristle brush or scouring sponge.
  5. Let solution work for 5 to 10 minutes.
  6. Rinse with clean water.
  • Please note: Bleach is a non-flammable product useful for eliminating mould that causes mildew. It bleaches and disinfects, but does not remove grease. To get rid of grease, use Polyprep Cleaner with Active Oxygen 771-135 (liquid) or 771-136 (powder)
Never mix cleaner and bleach directly because the mixture will produce toxic fumes.

Etching smooth concrete surfaces:

Checklist

  • Plastic watering can
  • Broom or long-handled brush
  • Electrical equipment or plastic film to test moisture
  • Muriatic acid Polyprep 771-127
  1. Generously apply product without diluting with plastic watering can.
  2. Vigorously rub surface with a broom or long-handled brush.
  3. Let work for 15 to 20 minutes until bubbling stops.
  4. Rinse with clean water before surface dries.
  5. Repeat until concrete turns rough.
  6. Wait 3 to 5 days before performing moisture test.
  7. Test surface moisture in 4 or 5 locations. Use an electronic instrument or attach plastic (polyethylene) films with masking tape to surface areas to be tested. Leave the plastic films in place three days. After three days, check for any signs of moisture (droplets forming under the plastic films).
  8. If there is no trace of moisture, apply the paint of your choice.

Eliminating efflorescent salts:

Checklist

  • Plastic watering can
  • Broom or long-handled brush
  • Electrical equipment or plastic film to test moisture
  • Muriatic acid Polyprep 771-127
  1. Generously apply product without diluting with plastic watering can.
  2. Vigorously rub surface with a broom or long-handled brush.
  3. Let product work until bubbling stops.
  4. Rinse with a power washer using clean water before surface dries.
  5. Let surface dry completely.
  6. Wait 3 to 5 days before performing a moisture test.
  7. Test surface moisture in 4 or 5 locations. Use an electronic instrument or attach plastic (polyethylene) films with masking tape to areas to be tested. Leave the plastic films in place three days. After three days, check for any signs of moisture (droplets forming under the plastic films).
  8. If there is no trace of moisture, apply the paint of your choice.

Table of cleaners and strippers and their uses:

Table of cleaners and their uses. Click here