PU Topcoat A+B

✅ PU Two-Component Topcoat 

Application:
This PU coating is used as a protective, waterproof topcoat over mineral and epoxy substrates on floors and walls.

🔧 Step 1: Preparation

1. Clean the substrate:

   • Ensure the floor or wall is dry, dust-free and grease-free.

   • Lightly sand for good adhesion.

   • Mask edges with painter's tape where PU should not be applied.

2. Materials required:

   • 2-component PU (coating A + hardener B)

   • Electric mixer (low speed)

   • 2-component roller (preferably 25 cm wide)

   • Optional: a brush with soft bristles (for corners/edges)

   • Paint tray

   • Tape

   • Sanding pad or fine sandpaper (for recoating)

🧪 Step 2: Mixing Coating A + Hardener B

1. Ratio:

   • 62.5 grams A : 12.5 grams B or 80 grams : 16 grams B. 5-1
     (Note: check mixing ratio on packaging)

2. Mixing:

   • Pour B into A.

   • Mix for 2 minutes electrically at low speed.

   • Pour into a paint tray.

   • Do not mix too much at once: pot life = approx. 1 hour.

⚠️ Note:

• Do not seal after mixing: gases are produced during the reaction.

• Higher temperature = shorter pot life.

• Mixed cold = poor mixing.

🖌️ Step 3: Applying the PU Topcoat

1. Start at the window side (light source):
   Work away from the light to better see gloss and imperfections.

2. Working direction floor:

   • Roll in strips of maximum 1 metre width

   • First perpendicular to the light (parallel to window) distribute

   • Then in the direction of the light roll out evenly

   • Use a dry roller for back-rolling

3. Working direction wall:

   • From bottom to top or from left to right

   • Final movement always complete (entire wall or floor strip)

   • Do not lift the roller halfway

⚠️ Important:

• Work wet-on-wet, avoid pooling

• Apply corners with brush and back-roll immediately

🕒 Step 4: Apply second (or third) coat

• Wait at least 12 hours, but apply next coat within 48 hours.

• Longer than 48 hours? → Lightly sand substrate with PU sanding pad or fine sandpaper.

• Apply max. 3 coats.

🚶 Step 5: Curing & Use

• After 24 hours: carefully walkable

• After 48 hours: brief showering permitted

• After 7 days: fully cured and resistant

⚠️ Avoid during the first 7 days:

• Rugs

• Heavy objects,

• Moving furniture

🌬️ Ventilation and environmental conditions

• Ventilate well, no draughts or direct sunlight

• Underfloor heating off at least 24 hours beforehand

• Protect the floor against dust and dirt

• Remove tape immediately after applying the PU

🧴 Coverage & packaging

• One set (A + B) is sufficient for 5 m²

• Please note: rollers absorb PU – order a little extra

  • 25 cm roller uses approx. 150–200 g for proper application

• Coating is initially milky white, dries to a transparent matt finish

❓ Questions?

Do you have questions about using PU?
👉 Please feel free to contact us.
We're happy to help you on weekdays.