Tikkurila Oyj
(Previous date 13.10.2015)

Multistop Blocking Primer

Blocking primer for the prevention of discoloration on interior wooden surfaces.
Product features
Blocking primer for interior timber surfaces which prevents resin, tannin and knot staining.
Ceiling and wall panels, wooden floors, skirting, doors, windows and furniture.
Recommended uses
Suitable as primer and intermediate coat for both untreated and previously painted or varnished (with the exception of certain parquet lacquers), new or old wood surfaces in dry interior premises. Prevents discoloring wood extracts and other yellowing substances such as tar, etc. from entering into the top coat. Prevents discoloration caused by wood knots.

The paint is full-matt The paint is water-borne Tool: roller Tool: spray Tool: brush
The coverage of the paint on rough surfaces
The coverage of the paint on smooth surfaces
Colour Range
White F497
Gloss grade
7 m2/l  (minimum amount to be applied 260 g/m², wet film thickness 200 µm, dry film thickness 75 µm).
Can sizes
1 l, 3 l and 10 l
Application method
Brush, roller or spray.
Airless spray nozzle 0.013", no thinning
Drying time at 23°C and 50% relative air humidity
Touch-dry after approx. one hour.
Recoatable with sealing primer after three hours at the earliest.
Recoatable with finishing paint after approx. six hours.
Solids volume
38 %
1.3 kg/l, ISO 2811
Protect from frost.

Application conditions
The surface to be painted must be dry, the temperature at least +10°C, and the relative humidity of the air less than 80 %. A low temperature (approx. +15°C) and higher humidity (50–70 % RH) will extend the working time and make application easier.
In order to ensure the best possible adhesion, clean new wooden surfaces from any dirt and dust.
Wash previously painted or lacquered surfaces with neutral detergent according to need. Allow to dry. Remove loose paint or lacquer and sand the whole surface – especially floors and furniture. Remove sanding dust. If necessary, use Presto Rapid Filler to fill any cracks and dents, and sand the filled areas. Remove sanding dust. Patch paint with primer on bare wood surfaces.
Note! The adhesion of Multistop to certain parquet lacquers is poor, therefore the parquet lacquer should be completely removed, if Multistop is used over the entire surface.

Stir Multistop well before use. The product is used without thinning. Apply plenty of the paint, preferably with a thick nap roller and finish the surface once or twice with a synthetic brush. The best insulation result is achieved when the treatment is performed twice.


Finish panel ceilings with Paneelikatto Panel Ceiling White, panel walls with a suitable Helmi Furniture Paint and floors with Betolux Akva. The sealing primer can also be left on ceiling surfaces without a topcoat as long as the surface is treated twice. 

Cleaning of tools
Remove any excess paint from tools. Wash the tools with water. Tikkurila Pensselipesu (Tool Cleaner) is recommended for removing slightly hardened paint.
Maintenance instructions
After the surface treatment, surfaces must be handled with care for a few weeks, as the product will reach its final hardness and durability under normal conditions after about a month.
About a month after painting at the earliest, if necessary, clean the surface using neutral (pH 6–8) dishwashing liquid solution and a soft brush, sponge or cloth. Clean soiled surfaces using mild alkaline (pH 8–10) detergent solution and a cloth, mop or sponge, for example. Rinse the surface carefully.
EU VOC 2004/42/EC-limit value
(cat A/a) 30g/l(2010)
Multistop contains VOC max. 30 g/l
(cat A/g) 30g/l(2010)
Multistop contains VOC max. 30 g/l

according to Regulation (EC) No. 1272/2008
Contains 2,4,7,9-tetramethyldec-5-yne-4,7-diol and reaction mass of: 5-chloro-2-methyl-4-isothiazolin-3-one [EC no. 247-500-7] and 2-methyl-2H-isothiazol-3-one [EC no. 220-239-6] (3:1). May produce an allergic reaction. Wear protective gloves.

Recycle empty, dry cans or dispose them of in accordance with local regulations. Destroy liquid waste according to the local regulations for hazardous waste.
Not classified.
ser120417 / mkv111115 / akk100915