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MAPESIL LM

MAPESIL LM
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Neutral mould-resistant silicone sealant with very low emission level of volatile organic compounds (VOC) for stone and marble WHERE TO USE Mapesil LM is a solvent-free sealant with a low modulus of elasticity specifically formulated for sealing all materials sensitive to acids and plasticising agents, marble, granite, sandstone and quartz due to its chemical nature which deters surface bleeding or the migration of plasticising agents which would otherwise stain the substrate. • window/door fittings and wall surrounds; The chemical characteristics of the product also make it perfectly suitable for particularly delicate materials such as bricks, cellular concrete and varnished or enamelled wood. Mapesil LM generally forms an excellent bond on non-absorbent substrates too, such as glass, ceramic, clinker, enamelled surfaces, water and solvent-based varnish, metals in general and on various types of plastic. It is also suitable for contact with absorbent mineral substrates such as concrete, render and fibre-cement. TECHNICAL CHARACTERISTICS Mapesil LM is a one-component, solvent-free, neutral-cure silicone sealant which does not emit unpleasant odours, available in the form of a thixotropic paste. It is easy to apply on vertical and horizontal surfaces and cures at room temperature through the humidity present in the air to form a flexible sealant. This product generally forms a good bond on the above substrates even if a primer is not applied beforehand (contact the MAPEI Technical Services Department before). Performs well in treated water typically found in swimming pools. Thanks to the low modulus of elasticity of Mapesil LM, it is suitable for sealing internal and external fillet and expansion joints, including those subject to high levels of movement when in service, between: • pre-fabricated panels; • pipe-work and vertical walls; • similar and/or different types of coating materials. It is also suitable for sealing joints in floors with limited pedestrian traffic. Seals made using Mapesil LM are extremely stable over time, even when exposed to inclement weather, industrial environments, temperature variations or water. The product remains flexible over a temperature range of between -40°C and +150°C. Mapesil LM delays the formation of surface mould. Mapesil LM generally offers good resistance to chemical agents. However, because of the wide range of products and service conditions, if in doubt carry out preliminary tests beforehand. Mapesil LM bonds perfectly to most types of substrate used in the building industry without applying a primer beforehand (glass, ceramic, marble, aluminium,

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zinc-plated sheet metal, concrete, stainless steel and PVC). Primer FD must be applied beforehand in the case of prolonged immersion in water. If in doubt, please contact the MAPEI Technical Services Department or carry out preliminary tests beforehand. Mapesil LM is particularly suitable for surfaces sensitive to acids on which conventional neutral or acid sealants normally provoke changes in colour or staining of the substrate. Mapesil LM complies with EN 15651-1 norm (“Sealants for internal and external façade elements”) with performance rating F-EXT-INT-CC, with EN 15651-2 norm...

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TECHNICAL DATA (typical values) Conforms to the following standards: DIN 18545-2 class E – – DIN 18540 – ISO 11600-F class 25 LM – ISO 11600-G class 25 LM – ASTM C 920 class 25 – TT-S-00230 C class A – TT-S-001543 A class A – ASTM C 1248 – BS 5889 type A PRODUCT IDENTITY Classification according to EN 15651-1: thixotropic paste 100 white, 110 grey, 111 grey, 112 grey, 113 grey, 114 anthracite, 120 black, 130 jasmine, 132 beige and transparent Density according to ISO 1183 Met. B (g/cm³): EC1 Plus - very low emission APPLICATION DATA (at +23°C - 50% R.H.) Application temperature range:...

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SILVER GREY MEDIUM GREY CEMENT GREY the latest version of our Material Safety Data Sheet. Curing When Mapesil LM is exposed to the air, the surrounding humidity sets off the cure reaction and the sealant becomes flexible. The surrounding temperature only has a small impact on the cure rate of Mapesil LM, while the level of humidity in the surrounding air has the most influence. We highly recommend that the product is never applied if the temperature is below 0°C. Cleaning Traces of partially cured Mapesil LM may be removed from tools and the surface of the substrate with common solvents...

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