MAXSEAL® FLEX
HIGH PERFORMANCE, TWO COMPONENT, FLEXIBLE WATERPROOF COATING AGAINST POSITIVE AND NEGATIVE PRESSURE FOR CONCRETE AND MASONRY

Description

MAXSEAL FLEX is a two component product: Component A is a mortar based on a mixture of special cements, additives and well-graded fillers and Component B is a liquid based on special synthetic resin.

Once applied and cured, MAXSEAL FLEX provides a non-toxic, flexible and waterproof coating that adheres to those common substrates in construction such as concrete, natural and artificial stone, traditional mortar plasters, bricks, concrete blocks. For other substrates different from those above, contact our Technical Dept.

Uses

- Waterproofing and protection of water retaining structures, such as drinking water tanks, reservoirs, water mains and swimming pools.
- Waterproofing of below-grade structures like basements, retaining walls, foundations, tunnels, galleries subjected to positive or negative water pressure.
- Internal and external waterproofing and protection of new and old buildings against dampness, rain, pollution and aggressive environments.
- Waterproofing and protection of concrete against carbonation, freez-thaw cycles, and chlorine penetration in public works, irrigation channels, dams, retaining walls and water treatment plants, bridges, etc.
- Tile fixing and waterproofing of bathrooms, kitchens and other wet rooms in hotels, hospitals, offices and residential buildings, also suitable for exterior applications.
- Waterproofing of terraces and balconies, under the pavement.
- Anti-fracture barrier between substrate and finishes like tiles, etc.

Advantages

• Provides a fully-flexible coating which ensures complete waterproofing even in the most severe conditions, as high negative water pressure cases.
• Covers shrinkage and hairline cracks, acting as an anti-fracture membrane.
• Excellent protection for concrete, being both a CO2 an chlorine (Cl-) barrier and thereby preventing carbonation and electrochemical corrosion.
• Permeable to water vapour, allows the substrate to breathe.
• Resistant to abrasion and UV rays.
• Resistant to atmospheric pollution, corrosive effects of salt water and freeze/thaw cycles.
• Resists hydrostatic negative pressure from ground water when used for underground interior applications.
• Excellent adhesion and easy to use. Does not require bonding agents.
• Non toxic. Chloride free. Suitable for potable water.
• Longer lasting that other coatings, avoiding maintenance costs.
• Environmental friendly
• Specially recommended to complement other products of DRIZORO system like MAXSEAL or MAXSEAL SUPER, substituting them in those spots, joints, etc. where movements are expected.

Surface preparation

The surface to be coated must be sound, clean, free of all traces of paint, dust.

Grease, efflorescence, loose particles, gypsum plaster and curing or mould release compounds. Recommended cleaning methods are high pressure water cleaning and sandblasting. Other aggressive percussive methods are not recommended. Do not apply MAXSEAL FLEX on top of frozen surfaces.

Any damage or concrete defect should be repaired in advance. Cracks opened to approximately 2 cm. in depth. Superficial steel bars cleaned and exposed all around. Similarly patch all holes, voids and honeycombs. Repairs can be made with non-shrink, high mechanical resistance repair mortars like MAXREST, MAXRITE 500 or MAXRITE 700. Thoroughly wash down and saturate the surface with water, but leave no free standing water.

Tools

MAXSEAL FLEX is applied with a fibre type brush such as MAXBRUSH, broom or trowel. For large areas MAXSEAL FLEX can also be sprayed, being the recommended nozzle size 3-4 mm and spraying pressure between 3.5 and 5.0 bar. It is recommended to apply the first coat by brush to make sure that the surface is covered completely. Trowel may be used for jobs requiring smoother finishing. Clean tools with water before the product dries and hardens.

Mixing

MAXSEAL FLEX is supplied as two pre-weighed components. Pour the resin,

Application

Component B, into a clean container and add the powder gradually, component A. while mixing with a low speed mixing drill. Mix until a homogeneous mixture free of lumps is achieved. Do not add water and keep liquid/powder ratio as the package supplied. Depending on existing temperature and R.H. climate conditions, pot life expected will be between 30 minutes and one hour.

Apply two coats, using 1 – 1.5 kg/m2 of MAXSEAL FLEX per coat and allow a minimum of 16 hours and a maximum of 3 days between applications. Thickness per layer should be in the 1 mm range, thereby being important to avoid very thin application or, on the opposite, a much thicker one. To ease the application and make handling smoother, dampen the surface but never add water to product.

In those spots or places where movements are expected it is advisable to place a light (40 gr/m2) fibre glass mesh in the first layer. The fibreglass reinforcement will improve the performance of the layer in terms of absorption of movements. The fibreglass strip will be at least 20 cm wide and will be placed on a 0.5 kg/m2 MAXSEAL FLEX coat while it is still fresh, and immediately covered by 1 kg/m2 more of product.

Curing time required to put the product into service or to immerse it in water will depend on temperature and relative humidity conditions on site. Conditions in the range of 20ºC and 50% R.H will require a minimum of 14 days to ensure that the product has cured enough to be in permanent contact with water. Applications made at lower temperatures or sites without ventilation will require longer curing periods.

Application temperature
Do not apply below 5º C or if lower temperatures are forecast in the following two hours after application. Applications in temperature exceeding 30 ºC are not recommended either. Protect against quick drying by strong winds and high temperatures, by fog-spraying with water for two hours after application.

Colours

MAXSEAL FLEX is available in grey and white. Pigmented version MAXSEAL FLEX DECOR is available in pastel colours upon especial request. The RAL and NCS colours indicated below are indicative.

White | RAL 9003
Grey | Similar to RAL 7030
Ivory | RAL 9001
Blue | Lighter than RAL 5024 or NCS S 0530-B
Light Blue | Very much lighter than RAL 5024 or NCS 0505-B
Terracotta | NCS S1010-Y40R
Green | Lighter than RAL 6019 or NCS S1010-G10Y
Light Green | Very much lighter than RAL 6019 or NCS S0520-Y90R
Pink | Very much lighter than RAL 3015 or NCS S0520-90R
Salmon | NCS S0520-Y60R
Cream | NCS S0510-Y10R

Textures

MAXSEAL FLEX is available in standard and smooth textures.

Storage

12 months when stored in its original packing, in a cool, dry place, protected from frost.

Packaging

Pre-weighed sets of 35 kg. and 7 kg. for standard type and 32 kg. and 7 kg. set for smooth type.

Health and Safety

The components are non-toxic by themselves, but powder component is as abrasive as any other cement-based material. Use protective gloves when mixing or applying. In case contact with eyes occurs, rinse thoroughly with clean water, but do not rub. If
irritation continues consult a doctor.

Technical data

Appearance of component A | Milky white liquid
Appearance of component B | Powder form
Density of liquid component A | 1.03 g/cm3
Density of powder component B | 1.15 g/ cm3
Density (A) + (B): | 1.56 g/ cm3
Waterproofing against direct pressure condition: Instituto Eduardo Torroja. Report 16.953 Part 20 | > 9 kg/cm 2 (Maximum pressure of testing equipment)
Waterproofing performance under hydrostatic pressure condition | 4 kg/cm2
Resistance to freeze – thaw cycles and de-icing salts After 56 freeze – thaw cycles in the presence of chlorides (15% ClNa) Cement och Betong Instutet – Stockholm | Complies with requirements of Bridge Code 94 and document 1994:2 of Sweden Scaling < 0.03 kg/m2

Adhesion to different substrates
(Greater than the traction resistance of MAXSEAL FLEX, or the cohesion of the substrate) | Substrates | N/mm2 | Breakage
Wood | 1.8 | Mortar
Plywood | 0.4 | Breaks the substrate
Asphalt | 1.2 | Breaks the substrate
Asphaltic board | 0.4 | Breaks the substrate
Concrete (*) | 2.0 | Mortar
Previous MAXSEAL FLEX (*) | 1.8 | Mortar
Tile on tile | 0.5 | Mortar (of the lower tile)

(*) Cement och Betong Instutet – Stockholm

Hairline crack absorption Test performed by applying 1 mm of MAXSEAL FLEX over cement sample |
Temperature of the sample | Hairline crack absorption (mm)
23ºC | 2.00
0ºC | 2.00
-25ºC | 0.70
Suitability for contact with drinking water: Instituto Eduardo Torroja. Report 16.953 Part 2, according to UNE 53330-83 standard Concrete Controls Inc. Ref. CC930721 according to BS 6920 | Appropriate for drinking water reservoirs
Abrasion resistance: Wear index with CS-17 Grinder C.I.E.S.M. Report 00/0259 | 0.16 After 1000 cycles and a 1 kg. weight
Anti-radon barrier ÚERMS Pribam-Kamenna Ref. 22 63/95 | 2.3 ± 0.1 * 10 –7 m/s
Resistance to CO2 diffusion Cement och Betong Instutet – Stockholm | d CO2 = 0.43 * 10 –7 m/s R = 346 mts. (R>50 mts. by Prof. H. Klöpfer)
Resistance to water vapour diffusion Cement och Betong Instutet – Stockholm | d H2O = 0.131 * 10 –4 m/s S = 1.9 mts., equivalent air barrier
Bending test on a re-bar 8 mm. Cement och Betong Instutet – Stockholm (ASTM A 615) | 20% elongation without cracks
Resistance to chloride penetration Instituto Eduardo Torroja. Report 16.953 Part 21 (ASTM 1202) | Q Average = 185 Culombs (Very low absorption)

Guarantee

The information contained in this leaflet is based on our experience and technical knowledge, obtained through laboratory testing and from bibliographic material. DRIZORO reserves the right to introduce changes without prior notice. Any use of this data beyond the purposes expressly specified in the leaflet will not be the Company’s responsibility unless authorised by us. We shall not accept responsibility exceeding the value of the purchased product.

© 2003 DRIZORO S.A. All rights reserved.