Liquid coating PCI Lastogum 8 kg White

Preparation of substrate

The substrate must be structurally sound, dry (cement screed 4%, anhydrite flowable screed 0.5%, measured with CM meter), clean and free from oil, grease and other residues which should be removed by sand-blasting, brushing or shotblasting (Blastrac) if necessary. The practically smooth surface must be free from honeycombs, gaping cracks or ridges. Prime gypsum-based substrates and plasterboards beforehand with undiluted PCI Gisogrund. Prime absorbent mineral substrates with PCI Gisogrund, diluted 1 : 1 with water. Prime dry, tightened particle boards with PCI Wadian. The primers must have cured before applying PCI Lastogum.

Application procedure

1. Apply undiluted PCI Lastogum by roller (lambskin roller), brush (wall brush, float), or trowel to the substrate covering the entire surface. A minimum of two layers is required.
2. Place PCI Pecitape 10 x 10 and/or PCI Pecitape 42.5 x 42.5 over pipe culverts and floor drains, in corner joints and floor/wall junctions press PCI Pecitape 120 into the first layer of PCI Lastogum. Projecting edges of the fabric are covered by the second layer.
3. Any further layer is applied when the first layer is dry. We recommend to apply the first layer with PCI Lastogum grey and the following layer(s) with PCI Lastogum white for better coverage control. The applied layer is too thin if the previous colour is visible; this should be avoided.
4. When PCI Lastogum has cured, tiles and flagstones can be laid on vertical and horizontal areas using PCI Nanolight, PCI Flexmörtel or PCI Flexmörtel-Schnell. Calibrated natural stone should be laid using the adhesives for natural stone PCI Carraflex and/or PCI Carralight

Please note:

• PCI Lastogum is not recommended for outdoor use and waterproofing measures in swimming pools. Use the crack-bridging waterproofing slurry PCI Seccoral for these purposes.
• Do not apply PCI Lastogum at substrate temperatures below +5 °C and above +25°C.
• The protective layer can be exposed to foot traffic after 2 hours at the earliest when applying two layers.
• We recommend to apply the first layer of PCI Lastogum in grey and the second one in white for better coverage control. The first layer must not be visible.
• In-wall fittings which can be integrated into the water-impermeable protective layer of PCI Lastogum using PCI Pecitape 42.5 x 42.5 are available from e.g. Hansa or DAL, thin-bed floor drains are available e.g. from Wiper.
• The waterproofing collar PCI Pecitape 10 x 10 should enclose the pipe (not the plug which will be removed later), otherwise the pipe must be extended beyond the area to be waterproofed by inserting a spacer.
• The connection joint at the edge of floating screeds must be free from mortar and waterproofing slurry to avoid acoustical bridges. We recommend to leave an area free from PCI Lastogum, i.e. at least 10 mm in horizontal and vertical direction at the wall/floor connection (see detailed drawing). Possible contamination on the barrier strip should be thoroughly removed before inserting the waterproofing tape.
• Tools should be washed with water immediately after use. When the product has cured it can only be removed by mechanical scraping.
• Shelf life: min. 12 months; dry and protected from frost, no permanent storage over +30 °C.
• The waterproofing layer must also be applied below and behind the shower base and bathtub if the surrounding area is sensitive to moisture.

Documents available below are available to everybody for free to download. They can be open in high quality on your computer and be printed for further use.

Lastogum installation instructions Waterproofing a wall Waterproofing floor-wall connection Waterproofing floor drain