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• Features & Benefits
• Preparation
• Application

Features & Benefits

• Waterproofing wide joints by bonding pre-formed straps (PVC, Hypalon, Mapeband and Mapeband TPE) to the concrete
• Rigid structural bonding of prefabricated concrete elements
• Sealing large cracks in industrial floors subject to traffic
• Bonding slabs and pipes in concrete and fibre-reinforced concrete
• Bonding steel to concrete
• Bonding metal or TPE drains (Drain Front)
• Two-component adhesive based on epoxy resin, fine-grained selected aggregates and special additives blended according to a formula developed in MAPEI’s own Research & Development Laboratories
• Unlike Adesilex PG1 and Adesilex PG2, two-component thixotropic epoxy adhesives used for structural bonds, this product is characterised by its extended workability time. This property makes the product easier to use, even at high temperatures
• Characterised by its low viscosity and, as a result, offers good wetting of the substrate. This makes it easy to apply with a spatula on horizontal surfaces, vertical surfaces and on ceilings without dripping, due to its high thixotropy
• After preparation, Adesilex PG4 hardens in 5 hours (at +23°C) through chemical cross-linkage without shrinking. The composite obtained is characterised by its high bonding properties and by its considerable mechanical strength. Adesilex PG4 can be applied even on very damp surfaces as long as there is no standing water
• Adesilex PG4 meets the requirements defined by EN 1504-9 (“Products and systems for the protection and repair of concrete structures - Definitions, requirements, quality control and evaluation of conformity - General principles for the use of products”) and the minimum requirements claimed by EN 1504-4 (“Structural bonding”)

Preparation

• Hypalon straps must be cleaned beforehand with a solvent, as recommended by the producer of the material, to improve bonding of the resin to the product
• In the case of metallic surfaces, remove all traces of rust, paint and oil. Sandblasting down to a bare metal finish (SA 2 / ) is recommended
• Concrete or natural stone substrates must be clean, solid and dry. The most suitable method is either sandblasting or brushing of the surface, in order to remove loose or detached parts, efflorescence, cement laitance and traces of form-release oil
• After this operation, clean the remaining dust off the surface with compressed air. To avoid the stresses induced by hygrometric shrinkage of the cementitious conglomerate being concentrated at the interface which is to be bonded, freshly laid concrete must be cured for at least 4 weeks before applying Adesilex PG4. When applying the product, the temperature must be between +5°C and +30°C.

The two components which make up Adesilex PG4 must be mixed together. Pour component B (white) into component A (grey) and mix together with a low-speed drill fitted with a mixing attachment until a homogenous mix is obtained (uniform grey colour). The packages are pre-dosed. Therefore, do not use partial quantities of the two components in order to avoid accidental errors when calculating the mixing ratio; this could lead to incorrect hardening of the product. If only partial quantities of the components are to be used, use high-precision electronic scales. Mixing ratio: · 3 parts by weight of component A; · 1 part by weight of component B.

Application

Adesilex PG4 may be applied with either a flat spatula or trowel on Mapeband, Mapeband TPE on PVC braces, on Hypalon between concrete surfaces, between concrete and metal or on natural stone. · If Adesilex PG4 is to be used for bonding straps, we recommend applying masking tape on the outside surface of the joint where the adhesive is to be spread to obtain a well-defined profile. Apply a first, 1-2 mm-thick uniform layer of Adesilex PG4 on the clean, dry substrate with a smooth spatula; avoid applying the adhesive inside the joint. Lay on the straps to be bonded by pressing lightly along the sides. Make sure that all wrinkles and creases are eliminated and that air bubbles are not formed. Spread on a second layer of Adesilex PG4 while still fresh, and completely cover the lateral parts of the tape with the new layer. Smooth off the product with a flat trowel and dust the surface with dry sand to improve the adhesion of products applied later. · If Adesilex PG4 is to be used for bonding concrete, metallic or natural stone surfaces, we recommend spreading the product on both surfaces to be bonded, and to make sure that it penetrates well into uneven areas in order to obtain a good bond. After spreading on the product, join the two surfaces and hold them firmly together and still until the adhesive is completely hardened. The correct thickness in order to guarantee a good bond between the two parts is approximately 1-2 mm. Surrounding temperature effects the hardening time of the product: at +23°C Adesilex PG4 remains workable for 70 minutes and at +10°C for 150 minutes. Once these times have been reached, the hardening process starts. Adesilex PG4 must be applied within the working times indicated. Therefore, we recommend organising the work to be carried out in order to finish the job within the aforementioned times.