Protective primer PCI Gisogrund® 5L

Preparation of substrate

The substrate must be structurally sound, clean and able to bear weight. Remove oil stains, residues which could impair adhesion such as waterproof adhesive residues, cement paste and dirt very thoroughly. Newly applied cement screeds must have a moisture content level not exceeding 4%, rough-ground anhydrite and/or gypsum based screeds not more than 0.5% (measured with CM meter).

Application procedure

Priming and strengthening of gypsum based substrates, anhydrite screeds, mastic asphalt screeds and xylolith screeds as well as screeds with old adhesive residues (not suitable with water soluble adhesive residues, e.g. sulphite liquor adhesives)

1. Stir PCI Gisogrund well prior to the application (and/or shake 1 litre bag well).
2. Apply a sufficient quantity of undiluted PCI Gisogrund by brush or float to achieve a uniform coat. Avoid puddles forming!
3. Check strengthening and curing by scratching the surface. Do not apply tile adhesive, wallpaper, paint, plaster or PCI Periplan, PCI Periplan fein or PCI Periplan Tixo before PCI Gisogrund is dry.

Priming and strengthening of absorbent mineral substrates, e.g. concrete, cement screeds, gauged renders, aerated concrete, limestone or similar.

1. Stir PCI Gisogrund well (and/or shake 1 litre bag well), dilute 1 : 1 with water and mix thoroughly.
2. Apply a sufficient quantity of diluted PCI Gisogrund by brush or float to achieve a uniform coat.
3. In case of very absorbent substrates it is recommended to apply a second coat of PCI Gisogrund, diluted 1 : 1 with water, to achieve a more intensive strength and to avoid blow holes forming. Do not apply the second coat until the first one has completely cured.
4. Do not apply tile adhesive, wallpaper, paint, plaster or PCI Periplan, PCI Periplan fein or PCI Periplan Tixo as floor leveller before the primer is dry (scratch proof).

Application

Please note:

• Do not apply at temperatures below +5 °C and above +30°C.
• Clean tools with water immediately after use. Once cured material can only be removed by mechanical scraping.
• In case of partial tiling the entire wall area should be primed (e.g. behind the bathtub or above the tile covering).
• Apply only one coat of PCI Gisogrund, diluted 1 : 1 with water (consumption: approx. 100 to 140 ml of diluted mix per m²) before wallpapering on plaster/render, gypsum plasterboards etc.
• The curing time of the wallpaper paste slows down when wallpapering on substrates primed with PCI Gisogrund. Do not paint over woodchip wallpaper etc. before the paste has completely cured.
• The first coat of PCI Gisogrund can be diluted 1 : 2 with water in case of very absorbent substrates, e.g. aerated concrete.
• Follow the recommendations issued by the gypsum industry regarding the maximum permissible moisture content, layer thickness of gypsumbased substrates and their surfaces.
• Avoid puddles forming when applying PCI Gisogrund to floor areas.
• Use particle filter mask P2 for spray application.
• PCI Gisogrund is not suitable to prime water-soluble adhesive residues (e.g. sulphite liquor adhesives). They must either be completely removed or primed with PCI Epoxigrund 390 (sprinkle with silica sand while still wet).
• Old adhesive residues must be completely removed before laying natural stones.
• Do not apply PCI Gisogrund in underwater situations.
• Use PCI Gisopakt bonding agent to prime concrete and limestone before applying plaster and gypsum lime plaster.