Multifinish

Single component, fibre-reinforced, thixotropic, cementitious mineral mortar for repairing and finishing various types of surfaces. Formulated with special hydraulic binders for rendering, plastering and levelling to a maximum thickness of 10 mm. Classified as C, MC and IR principles according to EN 1504-2, and as GP CS IV-Wc1 according to EN 998-1. For internal and external use. Its special formulation delivers excellent adhesive strength and compatibility with a whole range of different substrates: concrete, cementitious, cement-lime-sand and lime render/plaster, old wall paint – provided it is strong and perfectly attached to the substrate – old external wall insulation textured coatings/renders, cellular concrete blocks, plasterboard. Once mixed with water, the resulting mortar offers excellent workability, excellent thixotropic properties and high adhesive strength. Good freeze-thaw cycle resistance. The product awarded the EC 1 Plus label by the GEV association for very low emissions of volatile organic compounds.

Instructions for use

Preparation
Substrates must be clean and sound, free from oil and grease, dust, crumbling material and dirt in general. Any remaining traces of formwork release agents must be removed thoroughly. Old wall paint or textured renders must be sound and not coming away from the substrate. Mechanically remove any loose, crumbling or unsound material back to a strong, sound substrate. Water blast the whole surface to be treated to remove all traces of dust or other loose material.

Mixing the product
Mix Multifinish with 24-26 % clean water (equivalent to 6,0- 6,5 litres per 25 kg bag) as follows: pour almost all the water needed into a suitable container, then add the powder product slowly, mixing the mortar at the same time using a power drill on low speed with a suitable propeller paddle attached. Once you have finished adding all the powder, pour in the remaining water and mix to an even, lump-free mixture, making sure you scrape lumps of material that has not been properly mixed in away from the walls and bottom of the container. Allow to sit for approx. 5 minutes and then give it a quick remix. The resulting mixture has a pot life of approx. 5 hours under normal conditions (at 20 °C); higher temperatures will shorten the pot life, while lower temperatures will extend it. When dealing with absorbent substrates, before Multifinish can be applied, thoroughly soak the substrate with water until it is saturated and allow excess water to evaporate or remove it with a sponge. Substrates consisting of old paintwork, textured coatings/renders, old glass or ceramic mosaic claddings and plasterboard must instead be perfectly dry.

Application
Apply the product with a plasterer’s float for finer finishing or using a trowel and/or mortar spreader for higher builds (never exceed a total of 10 mm). The product can also be applied using a suitable mortar spraying machine. For thicknesses in excess of 5  mm, and more generally speaking when dealing with particularly uneven and/or cracked surfaces, it is advisable to apply the product in two consecutive coats, embedding alkali-resistant fibreglass reinforcement mesh and/or galvanized metal lathing in the first coat before applying the next. Once the product applied has been allowed to set properly (taking between 20 and 30 minutes under normal conditions), finish with a trowel or with a sponge float, depending on the desired finish. After 12/24 hours, the surface can be further optimized/scratched, where necessary, with a suitable plaster scraper. Once Multifinish plaster/render coatings have been applied and finished, they must be shaded from direct sunlight, and protected from rain for at least 24 hours. Tools used for application should be cleaned with water before the mortar is allowed to harden, after which only mechanical cleaning will be effective in removing the product.

Storage

Multifinish must be kept in a dry, sheltered place. The product has a shelf life of at least 12 months when stored in the original, unopened bags. DO NOT EXPOSE TO MOISTURE.

Warnings

Do not apply Multifinish when temperatures are below +5 °C or over +35 °C. Never mix with other binders, such as cement, hydraulic lime, plaster, etc. Do not use the mixture again or add more water once it is no longer workable. Make sure the batch of product prepared each time is small enough to be applied within its workable life. Do not render or plaster when temperatures are too high or there is a strong breeze; protect from direct sunlight; mix with cold water. For application on plasterboard surfaces, joins between panels must be primed first with Tile Primer. If in any doubt regarding this type of application, please seek the advice of our Technical Department.