SOLTHERM UB SPECIAL is a base coat and adhesive formulated to embed glass fibre mesh in ETICS insulation systems and to bond insulation boards to typical mineral surfaces (such as concrete, masonry walls, cement and lime-cement plasters, etc.) as well as to retrofit, re-insulate walls or install insulation over the existing one. It is also used to level minor irregularities /up to 5 mm/ of mineral substrates and smooth out mineral substrates prior to paint and thin-coat render application.