Mapeflex MS 45

One-component flexible, thixotropic, quickhardening sililated polymer-based hybrid sealant and adhesive with a high modulus of elasticity. Also suitable for damp substrates.

Available in a box of 12x330ml cartridges.

Technical Description

Mapeflex MS 45 is a thixotropic adhesive and sealant made from sililated polymers and thus completely free of silicone and isocyanates.

Mapeflex MS 45 is easy to extrude and smooth over (even when applied at low temperatures), has a wide application temperature range, does not blister even during particularly damp conditions, is compatible with damp substrates during application, is resistant to UV rays, hardens quickly, has a long shelf life.

Furthermore, Mapeflex MS 45 forms a better bond on compact and absorbent substrates, efficiently reduces the amount of dirt which collects on the surface, offers good mechanical properties such as tensile and shear strength.

Before painting over Mapeflex MS 45 it must be fully polymerised and the paint used must be flexible, such as Elastocolor Paint, elastomeric, crack-bridging, permanently flexible, protective paint with high resistance to chemicals for internal and external surfaces.

We recommend carrying out preliminary tests to make sure the sealant and paint are compatible.

Mapeflex MS 45 complies with EN 15651-1 (“Sealants for façade elements”) with
performance rating F-EXT-INT CC and EN 15651-4 (“Sealants for pedestrian walkways”) with performance rating PW-EXT-INT-CC.

Mapeflex MS 45 contains no solvents, has a very low emission level of volatile organic compounds (EC1 Plus) and is characterised by high mechanical strength according to ISO 11600 (class F20 HM).

Mapeflex MS 45 may also be applied on substrates which are temporarily wet due to unsuitable surrounding conditions (recent rain, contact with water, atmospheric damp, etc.); for continuous capillary rising damp, apply a coat of Primer FD
beforehand. If applied on damp substrates or on substrates continuously immersed when in service, the mechanical performance and the adhesion of the product could be significantly lower compared to use in dry conditions.

Mapeflex MS 45 hardens by reacting with humidity in the surrounding air without giving significant levels of liquids or gases potentially hazardous for the user or the environment, which is why no safety warnings need to be applied on the packaging.

The product is ready to use and is available in plastic cartridges to be used with traditional extrusion guns.

Areas of Use

Mapeflex MS 45 has been specifically developed for sealing expansion, fillet and distribution joints on horizontal and vertical surfaces. It is also recommended to form internal and external flexible bonds between similar and dissimilar materials commonly used in the building industry and to replace or integrate mechanical fasteners.

Some application examples

Used as sealant:
Sealing expansion, fillet and distribution joints subject to movements of up to 20% of the average width of the joint.
It is most frequently used for the following applications:
· traditional façades;
· ventilated façades;
· civil and industrial floors, including those subject to heavy vehicular traffic;
· window and door fittings;
· cracks and splits;
· paintable joints;
· tin roofs and metalwork.

Used as flexible adhesive:
When applied at a thickness of 3 mm, it forms a flexible bond between most building materials, including many types of plastic.
Its high bond strength without primer and its rapid polymerisation make Mapeflex MS 45 easy to use when installing building elements or bonding construction features, both internally and externally.

The product bonds on the following:
· cement and cement-based materials;
· bricks;
· steel;
· copper;
· aluminium;
· painted surfaces in general;
· glass and mirrors;
· gypsum;
· wood and wood-based materials;
· ceramic and klinker;
· insulating materials in general;
· many types of plastic.