Wood painting
with liquid rubber — elastic & crack-bridging

Mechanically remove loose wood fibres, old glaze residue and dirt — if needed sand with grit 80–120, then sweep off dust thoroughly. Wood moisture must be below 20 % (manufacturer specification); higher moisture risks bubbling.

For heavily greyed wood or algae/fungal infestation, pre-treat with a wood de-greyer or algae/fungus remover, rinse thoroughly and let dry for 48 h.

Pro tip: Never apply over pressure-treated wood under 6 months old — impregnation agents must outgas first. Test: a water drop must absorb in 30 seconds, otherwise too early.

On strongly absorbent or splintery wood apply a deep primer (wood impregnation) — improves adhesion and protects against fungal growth through the wood. Let dry for 12 h before further work.

On sound old paint (glaze, lacquer) sanding with grit 80–120 is enough — primer can be skipped.

Pro tip: Always prime cut edges and end-grain twice — wood absorbs most here and weathering starts here. Double priming extends service life by years.

Apply diluted with up to 5 % water (up to 10 % with airless sprayer) — that way the first coat penetrates the wood fibres and forms the bonding base. Work with brush or lambswool roller in the grain direction. Consumption 150–250 g/m² (wood is absorbent).

Particularly careful at cut edges and joints — these areas are weather-prone.

Pro tip: On vertical wooden boards (fence, facade) work top to bottom and spread out drips immediately — otherwise streaks form that can't be fixed later.

Cure for at least 4 hours at 23 °C / 50 % RH. Wait longer at higher humidity or lower temperatures (up to 8 h). The first coat must be completely dry through, otherwise the second won't hold.

Protect wood from rain during drying — for outdoor application stretch a tarpaulin or postpone work to dry weather.

Pro tip: On strongly absorbent or dark wood the first coat often looks very matt — no concern, the second coat creates the final finish.

Apply undiluted, in the grain direction. Consumption 100–200 g/m². Rain-resistant after 6 h (manufacturer specification), carefully loadable after 24 h, fully load-bearing and cured after 28 days.

On heavily stressed areas (wooden fence facing the street, wooden facade weather side) a third coat is recommended — refurbishment then in 5–7 years instead of 3–4.

Pro tip: Touch up cut edges and post feet annually with a thin coat — these are the first weak points and so double the service life of the whole coating.