MARMOCEM LAST

Elastic sealing cementitious membrane of 2 components

MARMOCEM LAST is a spreadable, elastic, osmotic, 2-component sealing system. It reacts with the components of the cement and forms stable and insoluble salts which clog the pores and capillaries of the concrete by osmosis. It is suitable for the external and internal sealing of foundations, basements, conventional or inverted flat roofs, swimming pools, tanks, surfaces with capillary cracks and generally in any construction where sealing of the substrate is required. Thanks to the comprehensive, cohesive, elastic membrane that MARMOCEM LAST forms, it offers complete sealing and protection from moisture, excellent adhesion to the substrate, high resistance to negative pressures in bending and compression, as well as to temperature changes, while providing full breathability to the structural elements. Homogeneous, ready-to-mix, industrial product of consistently high quality. It ensures good workability, increased application speed, it is economical and provides excellent results. Suitable for drinking water tanks according to the requirements of W-347 and W 270 regulations (EBETAM / certificate no. 3743).

Composition & Features

• Component A: Mixture of high specifications grey cement, aggregates of selected granulometry, enriched with special improving additives. • Component B: High elasticity acrylic dispersion. • It complies with the specifications: EN 1504-2:2008, concrete surface protection products/systems. Granule size 0.7 mm • Suitable for drinking water tanks according to the requirements of W-347 and W 270 regulations (EBETAM / certificate no. 3743).

Application

• The substrate must be clean and firm and must be wetted to saturation before application. • Wood and metal tips should be cut to a depth of approximately 3 cm and then covered with REFIXCEM fiber-reinforced, repairing mortar. REFIXCEM is also used for the healing of concrete nests. • At the points where the floor joins the wall, it is recommended to form a curvilinear tough approximately 10 cm wide with REFIXCEM. • Any cracks in the substrate are filled with REFIXCEM. Then, after REFIXCEM has hardened, a coat of MARMOCEM LAST is applied locally and while it is still damp, a suitably cut piece of reinforcement (fiberglass mesh/polyester geotextile) is embedded along the crack. Finally, a second coat of MARMOCEM LAST is applied to cover the reinforcement completely. • In areas of severe cracking and connections or joints, in addition to the local use of the reinforcement mentioned, it is recommended to use it universally over the entire surface. The reinforcement is placed immediately after the application of the first coat of MARMOCEM LAST, while it is still damp. The coating thickness of the reinforcement strips should be approximately 10 cm. The second coat that will follow should completely cover the reinforcement (a third coat may be required). • The contents of component A (25 kg mortar) is added gradually and with continuous stirring to a bucket containing component B (6.5 kg emulsion) using an electric mixer at low speed or a traditional mixer until a homogeneous mixture (paste), suitable for spreading, is obtained. • MARMOCEM LAST is applied in two coats crosswise, using a brush or a small brush, with the second coat applied when the first is slightly dry. MARMOCEM LAST is a spreadable, elastic, osmotic, 2-component sealant system. It reacts with the components of the cement and forms stable and insoluble salts which clog the pores and capillaries of the concrete by osmosis. It is suitable for the external and internal sealing of foundations, basements, conventional or inverted flat roofs, swimming pools, tanks, surfaces with capillary cracks and generally in any construction where sealing of the substrate is required. Thanks to the comprehensive, cohesive, elastic membrane that MARMOCEM LAST forms, it offers complete sealing and protection from moisture, excellent adhesion to the substrate, high resistance to negative pressures in bending and compression, as well as to temperature changes, while providing full breathability to the structural elements. If the first coat has already hardened, sufficient wetting must precede. • The thickness of each coat should not exceed 1 mm, in order to avoid possible cracking. • The freshly coated surface should be protected from rain, direct sunlight, dust, etc. • The application temperature should be between +5 oC and +35 oC. MARMOCEM LAST contains cement which is classified as an irritant. Consult the safety instructions and precautions listed in the Material Safety Data Sheet of the product.

Packaging & Storage

• Packs of 31.5 kg (25 kg mortar + 6.5 kg liquid) on pallets. • In a dry place where frost does not form, for 12 months from the date of production, in unopened bags.

Consumption

Approximately 1.5 kg/m2/coat 1 mm thick, depending on the substrate.

Technical Specifications

Specifications: EN 1504-2:2008, Concrete surface protection products/systems.

COMPONENT A
FormGrey mortar
Specific gravity1500 kg/m3
Granule size<0.7 mm
COMPONENT B
FormWhite emulsion
Specific gravity1.1 kg/lt

 

FINAL PRODUCT
Apparent density of dry mortar1700 kg/m3
Consumption1.5 kg/m2/mm
Pot life60 minutes
Adhesion1.0 N/mm2
Vapor permeability (sd)<5 m (class I)
Hydrostatic pressure resistance>3 atm

Although the specifications and guidelines set out in this bulletin have been prepared to the best of our skills, knowledge and experience, they should be taken as indicative results and require verification after many applications.  Users to whom this product is addressed should verify its suitability for the intended application.  The end user is responsible for any result of the use of the product.