A gap in parquet or between skirting and floor can be filled with white sealant, but the joint will be visible from the doorway. LACRYSIL Coloured acrylic sealant comes in four wood shades, wenge, walnut, oak and pine, so the joint blends with the board.

Where it is used

Joints, cracks and gaps in wooden surfaces and parquet, and junctions between timber and plaster, concrete or stone. Typical jobs are dried-out parquet, the gap between floor and skirting, cracks in wooden stairs and the joint between a wooden window sill and the wall. It bonds well to wood, brick, stone, metal, concrete and PVC. Timber dries and shrinks with winter heating and takes up moisture and swells in summer; rigid filler comes away from such a gap, while the elastic joint moves with the board. It resists water and UV, and its service range up to +100 °C allows use over underfloor heating.

Choosing the shade and applying it

Match the colour on a clean, dry board in daylight, going by the finished surface, since varnish and oil change the tone of wood. If there is no exact match, pick a slightly darker shade. Apply at +10…+35 °C into joints up to 5 mm deep; it dries in 24–48 hours and serves from -40 to +100 °C. A 0.4 kg cartridge covers 17.6 m of a 4×4 mm joint. Fresh sealant washes off with water; shelf life is 18 months.

Questions and answers

Is it suitable for underfloor heating?

Yes, it is rated for service up to +100 °C.

Can it fill a deep gap?

The maximum joint depth is 5 mm.

What other sealants are there for wood?

They are listed on the “Sealant for wood” page.