Mapei Mapeflex PU 30

WHERE TO USE

• Sealing joints in vertical concrete structures, both interior and exterior.
• Abrasion resistant sealing of joints in industrial floors subject to heavy traffic, both interior and exterior.
• Sealing joints in rubber and PVC floors. Some application examples
• Sealing flexible joints in concrete walls. More in general, for all vertical structures, both interior and exterior, where a thixotropic product with high resistance to chemical agents, waterproof and vapour permeability is required.
• Sealing joints in ceramic tile floors in areas subject to heavy traffic such as supermarkets, industrial buildings with fork lift truck traffic, sidewalks, pedestrian crossings, arcades, squares, etc.
• Sealing movement joints in concrete floors in car parks and industrial buildings subject to vehicle traffic or where a high resistance to chemicals is required.
• Sealing rubber and PVC flooring by filling the joints between each single tile or the sheets.
• Elastic fillet seals for machine beds.
• Elastic fillet seals for pipe-work, drains, manhole covers, etc.

TECHNICAL CHARACTERISTICS

Mapeflex PU30 is a two-component thixotropic sealant consisting of devoid isocyanate free polyurethane polymer (component A) and a special hardener (component B). Mixing the two components produces a uniformly coloured thixotropic paste, easily workable with a flat trowel. Mapeflex PU30 can be used on both vertical and horizontal surfaces. After hardening by chemical reaction alone, which takes place in approximately 24 hours without shrinkage, Mapeflex PU30 becomes elastic, resistant to water and heat, with high mechanical strength and abrasion-resistant properties, and a good adhesion to almost all materials that are commonly used in building. Mapeflex PU30 cannot undergo work elongation above 10%. It is therefore necessary that the concrete has completed the shrinkage phase before sealing the joints (whether the joints are expansion or distribution joints). The resistance of Mapeflex PU30 to chemicals is good; however, due to the variety of products and working conditions under which it can be used, it is advisable to carry out preliminary tests in cases of doubt. The temperature resistance of Mapeflex PU30 is between -30°C and +80°C. Mapeflex PU30 complies with Euronorm EN 15651-1 (“Sealants for external and internal façades”) with performance rating F-EXT-INT.

RECOMMENDATIONS

• Do not use on substrates that are subject to rising damp.

• Do not use on damp surfaces.

• Do not use if the concrete has not cured completely and has not completed the shrinkage phase. It is not advisable to seal during the summer season; joints are at their maximum expansion. It is preferable to seal during the autumn.

• Before sealing make sure the expansion of the joints do not exceed 10% of the initial width. If otherwise, prefer sealants that have higher elongation properties or increase the width of the joint (refer to our Technical Services Department).

• Do not use on bituminous surfaces where the bleeding of oils may take place.

• The product may change colour if exposed to UV rays without losing any of its properties.

• Do not apply Mapeflex PU30 at temperatures below +10°C.

APPLICATION PROCEDURE

Preparing the surface for sealing If substantial contamination of cement laitance due to cutting, form release oils and grease are present, accurately clean the surface with high pressured water. If this operation is not necessary, accurately clean the internal sides of the joint that needs to be sealed. Use a metal brush to remove loose parts and then compressed air to remove dust. Before sealing, make sure the joint is perfectly dry. Apply Primer EP on the edges of the joints and left to dry for 3-4 hours before sealing with Mapeflex PU30 or epoxy solvent-free primers, such as Primer MF and Primer MF EC Plus. To avoid dirtying the concrete adjacent to the joint, apply adhesive paper along the edges. The tape can be removed immediately after sealing.

Preparing the product The two components of Mapeflex PU30 are supplied in the correct proportions. They must be accurately and completely mixed together until a thixotropic paste is obtained and the colour of the mix is uniform. Avoid partial quantities. If necessary dose the components by weight keeping in mind that the mix ratio of component A to component B is 94 : 6. Mixing must be carried only out with a low speed mechanical stirrer fitted with a whip to avoid the entrapment of excess air. The setting and working time are strictly tied to the ambient temperature; at +23°C approximately 1 hour. Applying the product The sealant can carry out its sealing function well and last in time only if the expansion joints are correctly sized.

As a general rule, sealing must be carried out as follows:

JOINT WIDTH SEALANT DEPTH

Up to 10 mm Equal to the width From 11 to 20 mm Always 10 mm Over 20 mm Equal to the half the width In order to easily fix the depth (following the above indicated) and prevent Mapeflex PU30 from adhering to the bottom of the joint, a Mapefoam closed cell polyethylene foam strip must be inserted first. Apply slight pressure with a proper sized trowel or with a wooden strip. Seal the joint using a small flat trowel making sure the product adheres to the sides of the joint. Remove the excess Mapeflex PU30 and finish the fresh surface with a clean trowel slightly moistened with a water and soap solution. Cleaning Mapeflex PU30 can be removed from surfaces, tools, cloths, etc., with toluene or alcohol before it has hardened; after hardening it can be cleaned mechanically or with Pulicol 2000.

CONSUMPTION

The consumption varies according to the size of the joint. For example, bearing in mind that the density of Mapeflex PU30 is 1.48 g/cm³, for a 10x5 mm joint, the consumption is approximately 75 g/m. COLOURS Mapeflex PU30 is available in grey 113. Special colours are available only on request and for an amount of at least 1000 kg.

PACKAGING

Mapeflex PU30 is available in 10 kg (component A = 9.4 kg + component B = 0.6 kg) and 5 kg (component A = 4.7 kg + component B = 0.3 kg) units. STORAGE Mapeflex PU30 is stable for at least 2 years if stored in a dry place at temperatures between +10°C and +35°C.

SAFETY INSTRUCTIONS FOR PREPARATION AND APPLICATION

Mapeflex PU30 component B is corrosive and may cause burns: moreover, it is harmful if swallowed and if it comes in contact with the skin. Both components A and B may cause sensitisation if they come into contact with the skin. When applying the product, we recommend the use of protective gloves and goggles and to take the usual precautions for handling chemical products. If the product comes into contact with the eyes or skin, wash immediately with plenty of clean water and seek medical attention. Mapeflex PU30 components A and B are hazardous for aquatic life. Do not dispose of this product in the environment. For further and complete information about the safe use of our product please refer to the latest version of our Material Safety Data Sheet.

PRODUCT ONLY FOR PROFESSIONAL USE.

WARNING

Although the technical details and recommendations contained in this product data sheet correspond to the best of our knowledge and experience, all the above information must, in every case, be taken as merely indicative and subject to confirmation after long-term practical application; for this reason, anyone who intends to use the product must ensure beforehand that it is suitable for the envisaged application. In every case, the user alone is fully responsible for any consequences deriving from the use of the product