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SEALER 101 is a nitrocellulose based primer type lacquer, to facilitate the sanding of floors. It is used for natural wood surfaces and provides a gloss finish.

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  • Finish : Gloss
  • Reduce waiting time before varnish coating


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Primer for Thiroclair, Thirothane and Aquavernis

Building components




Covering rate

7,5 to 10 m2/L (80 to 100 ft2/gallon)


Opaque yellow

Preparation / Application

Application temperature

Temperature between 15°C and 35°C Humidity between 35% and 70%

Application tools

Paint brush / Roller

Surface preparation

Sand the surface completely in the direction of the wood fibers with # 80 coarse paper and then sand the surface with # 120 fine paper until a smooth, even finish is obtained. Remove dirt with a vacuum cleaner and finish cleaning with a pad moistened with Thiroco solvent to remove all traces of dust.


The sealer should be used only when the air, surface and product temperature is between 15°C and 35°C, the relative humidity is between 35% and 70% and the surface has been prepared properly. Pour a small amount directly on the floor or into a paint tray and apply evenly using a pure silk brush or applicator pad. Depending on the ambient conditions, allow about 20 to 30 minutes of drying before sanding the surface lightly with thin paper # 180 or # 220 in the grain direction of the wood. Take care to remove dust from sanding before coating with the chosen topcoat.


Usually, the product becomes dry to the touch after 5 minutes. Allow to dry for about 20 minutes before walking on the wood floor. Wait at least 20 minutes before light sandblasting. The varnish can be applied after 20-30 minutes. The drying time depends on the application method, the temperature and the porosity of the surfaces.

Caution / Cleaning / Storage

Restriction / Caution

The technical data listed above have been compiled to guide and assist you. They are based on our experience and knowledge. These data are subject to change, given our policy of continual product development. People who use this product should first make sure of their compatibility with the intended purposes. Contact your sales representative for detailed recommendations.No smoking. Keep out of the reach of children. Keep open container or freshly applied product away from open flames, from anything that could cause sparks such as electrical appliances or other sources of heat.


Mineral spirits


Store this product away from frost. Store in a cool place between 15°C and 30°C. The product may be kept in its original sealed container up to 12 months after the date of purchase by the user.

Available format

3,78L / 18,9L


The customer must ensure that this product is suitable for the intended purpose. The user assumes full responsibility for the results of an application in accordance with the instructions on this label. Atmospheric conditions, applicator’s skills and surface conditions being beyond the manufacturer’s control, we limit our liability for one year following the date of purchase, with proof of purchase, to replacement of defective material only in its original hermetic container. Port paid plant (FOB plant).