F 5.6

F 5.6


A quick-drying oil-based filler for filling larger gaps.

Mixed with sanding dust from the sanded floor, it is used for filling gaps up to 2 mm wide.

BaseFill can be used in combination with Rustic Oil, Junckers oil-based or water-based lacquers, and is suitable for sanded and untreated floors, including most exotic wooden floors.

For professional use only.


Product: Oil-based filler to be mixed with sanding dust.

Package sizes: 5 and 10 litres.

Appearance: Colourless. 


Coverage: Approx. 10 m² per litre.

Before application: Shake/stir well before use.

Application tools: Broad full-edged spatula of stainless steel.

Substrate temperature: Minimum 15 °C.

Dilution: Delivered ready for use. Dilution is not recommended.

Drying time at 20 °C and 50 % RH: Approx. 30-45 minutes depending on the depth of the joints.

Cleaning of tools: White spirit.

Storage: Lasts for 2 years if unopened and stored at 20 °C.


High traffic areas:
1 application of pre-mixed BaseFill 10 m²/litre
+ 1 coat of BasePrime 10 m²/litre or PreLak 8 m²/litre
+ 2 coats of Strong, Strong Premium or HP Commercial 10 m²/litre.

Low traffic areas:
1 application of pre-mixed BaseFill 10 m²/litre
+ 1 coat of BasePrime 10 m²/litre or PreLak 8 m²/litre
+ 2 coats of ProTech or Profinish 10 m²/litre.

Oil treated areas:
1 application of pre-mixed BaseFill 10 m²/litre
+ 2 coats of Rustic Oil, applied wet in wet
+ 1 coat of Rustic Oil.


Untreated/sanded floors:
Ensure that the surface is absolutely clean, dry and free from all dust, wax, grease, polish, soap residues etc. Sand the surface to remove dirt and irregularities.
Vacuum thoroughly and mix enough sanding dust into the BaseFill until a thick but spreadable paste is obtained. If too thick adjust with BaseFill.

Stir well before use and spread the paste quickly using a stainless steel spatula. Sand with sandpaper grit 120-150. Vacuum thoroughly.
Proceed according to one of Junckers' system recommendations.

Previously sealed floors:
Use sandpaper grit 24-36 to strip old coats. Then remove abrasion marks with grit 60-80. Finally, use grit 120-150 to obtain a completely smooth surface. Vacuum sanding dust and prime the floor as described under “Untreated/sanded floors”.


Before using the product, read the label on the container carefully and observe the recommended precautionary measures.

See Material Safety Data Sheet for detailed information. 


F 4.2 - Junckers ProFinish
F 5.1 - Junckers Strong
F 5.9 - Junckers Strong Premium
F 6.2 - Junckers ProTech
F 6.4 - Junckers BasePrime
F 8.2 - Junckers HP Sport
F 8.5 - Junckers HP Commercial