Where can I use Maxseal Flex?

Maxseal Flex is a flexible 2-component cementitious membrane for swimming pools, water tanks, basements, bathrooms, balconies, terraces, planter boxes, and retaining walls - any structure needing flexibility plus waterproofing.

What's the coverage rate?

Apply 2.0-3.0 kg/m² total in two crossed coats at 1.0-1.5 kg/m² per coat (approximately 1mm per coat). Coverage depends on substrate porosity.

Maxseal Flex is two-component - Component A liquid acrylic resin plus Component B cement powder. Mix Component A first, then slowly add Component B while mixing with a slow-speed drill until homogeneous.

Recoat window between coats?

Apply the second coat between 16 hours minimum and 3 days maximum after the first. If exceeded, dampen the surface and apply a third refresh coat.

Standards compliance?

CE marked. Typically certified to EN 14891 (waterproofing under tile adhesives) and EN 1504-2 (concrete protection). Refer to the linked TDS for full Declaration of Performance.

Drizoro MAXSEAL FLEX flexible waterproof coating for concrete, masonry, blocks and brick

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Drizoro Maxseal Flex

$325.95

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Flexible cementitious waterproof coating that withstands 10 bar positive and 3.5 bar negative water pressure.

MAXSEAL FLEX is a two-component flexible cementitious waterproof coating for concrete and masonry. Component A is a water-based special acrylic resin and Component B is a mortar of special cements, additives and well-graded aggregates. It bridges microcracks and shrinkage cracks, withstands 10 bar positive and 3.5 bar negative water pressure, and is approved for contact with potable water under EU Directive 2020/2184 and BS-6920.

Where to use it

Drinking water tanks, reservoirs and swimming pools
Basements, retaining walls and foundations under negative water pressure
Concrete in water treatment plants
Roofs, terraces, balconies and window boxes
Bathrooms, kitchens and wet rooms under tile

Why waterproofers buy it

Withstands 10 bar positive and 3.5 bar negative water pressure (EN 12390-8)
Approved for contact with potable water (EU Directive 2020/2184, BS-6920)
Crack bridging Class A3 at 20C, Class A4 with DRIZORO MESH 58
CE marked under EN 1504-2 as a mortar for protection of concrete
Solvent-free, environmentally friendly cement-based product
Two coats, 1.0-1.5 kg/m2 per coat by brush or broom, 12-16 hours between coats

Coverage

35kg set: approximately 11.7 to 17.5 m2 at 2.0 to 3.0 kg/m2 total application. Consumption 1.0 to 1.5 kg/m2 per coat over two coats.

Not for

Do not apply over waterproofed, bituminous substrates or resins. Do not apply if rain or water contact is expected within 24 hours. Optimum temperature 5 to 35C. Do not apply below 5C or on frozen surfaces.

All times at 20C and 50% RH. Component A SDS and Component B SDS are available separately from Drizoro.

Withstands 10 bar positive and 3.5 bar negative water pressure (EN 12390-8)

Approved for contact with potable water under EU Directive 2020/2184 and BS-6920

Crack bridging Class A3, or Class A4 with DRIZORO MESH 58 (EN 1062-7)

Size: 35KG

35KG$325.9514KG$246.957KG$115.95

Quantity: 1

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Pickup available at The Waterproofing Shop

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Drizoro Maxseal Flex

35KG

The Waterproofing Shop

Pickup available, usually ready in 24 hours

22/872 Canterbury Road
Roselands NSW 2196
Australia

+61280213517

Product Details

APPLICATION FIELDS  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 both positive or negative high water pressure.  Internal and external waterproofing and protection of new and old buildings, façades against dampness, rain, pollution and aggressive environments.  Waterproofing and protection of concrete against carbonation, freeze-thaw cycles, deicing salts in highways and chlorine penetration in public works, irrigation channels, dams, © DRIZORO S.A.U. MAXSEAL®FLEX retaining walls and water treatment plants, bridges, etc.  Tile fixing and waterproofing under tile and pavement in terraces, balconies, bathrooms, kitchens and other wet rooms in hotels, hospitals, offices and residential buildings, in indoor or outdoor use.  Waterproofing of window boxes, gardens and other surfaces subject to root penetration. ADVANTAGES  Provides a fully-flexible coating which ensures complete waterproofing even in the most severe conditions, as high negative water pressure.  Covers shrinkage and hairline cracks of the concrete.  Acts as an anti-fracture membrane between the substrate and other finishing coats if applied.  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.  Withstands atmospheric pollution, corrosive effects of salt water and de-icing salts 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 and can be applied on wet surfaces.  Non-toxic and chloride-free. Suitable for contact with potable water.  Longer lasting that other coatings, avoiding maintenance costs.  Environmentally friendly.  Withstands the root penetration, when properly reinforced with fibber glass mesh.

How to Use

Apply two coats in a thick layer by fibre brush or nylon broom at 1.0-1.5 kg/m2 per coat, about 1mm per coatConfirm the surface is solid, sound, rough and uniform, free of paints, efflorescence, loose particles, greases, release oils, dust and plaster
Remove previous lime or acrylic treatments, leaving only strongly adhered remains
Sandblast or high-pressure water clean smooth or poorly absorbent substrates to provide an open texture surface
Open all holes and cracks at least 2.0cm and patch with MAXREST
Stop any active water leaks with MAXPLUG before coating
Clean and passivate exposed reinforcement with MAXREST PASSIVE; cut back surface and non-structural irons 2cm and cover with a structural repair mortar
Apply an anti-efflorescence treatment such as MAXCLEAR SULFALT where salt crystallisation is a risk
Saturate the whole surface thoroughly with clean water and let the excess drain; leave no free-standing or pooled water
Pour Component A into a clean container and add Component B gradually while mixing with a low speed drill at 400-600 rpm for 2-3 minutes
Rest the mix for 5 minutes then remix briefly before application
Apply the first coat in a thick layer by fibre brush or nylon broom at 1.0-1.5 kg/m2, about 1mm thick, and do not spread it like paint
Reinforce fissures, concrete joints and repaired active cracks with DRIZORO MESH 58 bedded in the first coat in strips at least 20cm wide
Allow a minimum of 12-16 hours and a maximum of 24 hours between coats
Wash down and saturate the surface again before the second coat, leaving no free-standing water
Apply the second coat to reach a total of 2.0-3.0 kg/m2; on vertical surfaces run the second layer horizontally and on pipelines in the direction of water flow
Keep the coating moist for at least 24 hours with polyethylene sheets or damp burlap and do not apply curing agents
Allow 7 days at 20C and 50% RH before covering with ceramic tile, plaster or earth/gravel
Allow 14 days before permanent water contact and wash the surface with water before putting into service

Technical Specifications

Product Classification: Mortar for protection of concrete, coating (C), CE marked to EN 1504-2
Chemical Base: Two component - Component A water-based special acrylic resin, Component B cement, additive and graded aggregate mortar
Component A Appearance: Milky white liquid
Component B Appearance: White/Grey powder
Density Component A: 1.03 +/- 0.05 g/cm3
Density Component B: 1.35 +/- 0.10 g/cm3
Density Fresh Mortar: 1.56 +/- 0.10 g/cm3
Set Weights (standard texture 35kg): 10kg Component A plus 25kg Component B
Positive Water Pressure Resistance: 10 bar (EN 12390-8)
Negative Water Pressure Resistance: 3.5 bar (EN 12390-8)
Water Vapour Permeability: Class I permeable, V 6.37 g/m2 day, SD 3.29 m (EN ISO 7783-1/-2)
Capillary Water Absorption: 0.01 kg/m2 h0.5 (EN 1062-3)
CO2 Permeability: SD 545 m (EN 1062-6)
Freeze/Thaw Resistance: Very good, scaling 0.03 kg/m2 (SS 137244)
Sulphate Resistance: High resistance, expansion 0.01% (ASTM C-1012)
Chloride Ion Diffusion: Very low ingress (ASTM C-1202)
Tensile Strength: 1.3 +/- 0.1 MPa (UNE 53510)
Elongation at Break: 59 +/- 5% (UNE 53510)
Bending Test on 8mm Reinforcement: 20% elongation, without fissures (ASTM A 615)
Crack Bridging: Class A3 at 20C; Class A4 at 20C with DRIZORO MESH 58 (EN 1062-7 Method A)
Adhesion to Concrete at 28 Days: 1.0 MPa or greater (UNE-EN 1542); 2.0 MPa (ASTM D 4541)
Classification Beneath Ceramic Tiling: CM P O2 (UNE EN 14891)
Abrasion Resistance: Taber wearing index 0.26 at 500 cycles, 0.16 at 1000 cycles (ASTM D-4060)
Potable Water Contact: Approved (European Directive 2020/2184 and Spanish RD 03/2023)
Potable Water Contact (UK): Approved (BS-6920)
Minimum Application Temperature: Above 5C substrate and ambient
Optimum Application Temperature: 5C to 35C
Pot Life: 30 to 40 minutes at 20C, 50% RH
Waiting Time Between Coats: Minimum 12 to 16 hours, maximum 24 hours at 20C, 50% RH
Drying Time: 24 hours at 20C, 50% RH
Cure Before Covering with Ceramic Tile, Plaster or Earth/Gravel: 7 days at 20C, 50% RH
Cure Before Permanent Water Contact: 14 days at 20C, 50% RH
Number of Coats: Two
Thickness Per Coat: Approx. 1mm
Consumption: 1.0 to 1.5 kg/m2 per coat, 2.0 to 3.0 kg/m2 total
Mixing: Low speed drill at 400-600 rpm for 2-3 minutes, rest 5 minutes, then remix briefly
Spray Set Up: 3-4mm nozzle at 3.5-5.0 bar
Colours and Textures: Grey and white, both in standard and smooth textures
Pack Sizes: Standard texture 35kg and 7kg sets; smooth texture 32kg and 7kg sets
Shelf Life: 12 months unopened, stored dry at 5C to 35C, protected from humidity, frost and direct sunlight

Product Files

Drizoro Maxseal Flex35KG

$325.95

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Technical overview

MAXSEAL FLEX is a two-component flexible cementitious waterproof coating for concrete and masonry that works against both positive and negative water pressure. Component A is a water-based special acrylic resin and Component B is a mortar of special cements, additives and well-graded aggregates. It is CE marked under EN 1504-2 as a mortar for the protection of concrete, classified CM P O2 under UNE EN 14891 for use beneath ceramic tiling, and approved for contact with potable water under European Directive 2020/2184, Spanish RD 03/2023 and BS-6920. Declared performance is stated against European, ASTM and UNE test methods. The Technical Data Sheet states no AS/NZS 4858 or AS 4654.1 classification for this product.

View full technical data sheet

Key applications

Water retaining structures - drinking water tanks, reservoirs, water mains and swimming pools
Below-grade structures - basements, retaining walls, foundations, tunnels and galleries under negative high-water pressure
Concrete in water treatment plants - water processing units and setting tanks
External protection against aggressive water and ground salts below the water table
Protection of concrete, mortar and masonry against weathering, carbonation, freeze/thaw cycles, de-icing salts and chloride attack
Roofs, terraces and balconies, in the open or under pavements
Window boxes, gardens and other surfaces subject to root penetration
Tile fixing and waterproofing under tile and pavement in bathrooms, kitchens and other wet rooms
Gypsum-based substrates including plaster rendering and gypsum/fibre-gypsum boards

Surface suitability

Concrete (thoroughly saturated with clean water, excess drained, no free-standing or pooled water)
Masonry and concrete blocks (saturated with clean water before application)
Brickwork (saturated with clean water before application)
Traditional mortar plasters and renders
Natural and artificial stone
Gypsum plaster, plaster rendering and gypsum/fibre-gypsum boards
Smooth or poorly absorbent substrates (sandblasted or high-pressure water cleaned to an open texture)

Do not apply over waterproofed, bituminous substrates or resins. Do not apply if rain, water contact, humidity or dew is expected within 24 hours of application. Optimum application temperature is 5C to 35C - do not apply below 5C or if lower temperatures are expected in the following 24 hours, and never on frozen or flooded surfaces. Do not add water, cement, admixtures, sand or any other compound; remix to recover workability but never add more water. Do not mix more material than can be applied in 20-30 minutes. Minimum and maximum consumption recommendations must be respected. Keep the coating moist for at least 24 hours after application using polyethylene sheets or damp burlap, and do not apply curing agents. Allow 14 days before permanent contact with water and wash the surface with water before putting it into service. Root penetration is only withstood when properly reinforced with fibre glass mesh.

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Technical Specifications

Product Classification	Mortar for protection of concrete, coating (C), CE marked to EN 1504-2
Chemical Base	Two component - Component A water-based special acrylic resin, Component B cement, additive and graded aggregate mortar
Component A Appearance	Milky white liquid
Component B Appearance	White/Grey powder
Density Component A	1.03 +/- 0.05 g/cm3
Density Component B	1.35 +/- 0.10 g/cm3
Density Fresh Mortar	1.56 +/- 0.10 g/cm3
Set Weights (standard texture 35kg)	10kg Component A plus 25kg Component B
Positive Water Pressure Resistance	10 bar (EN 12390-8)
Negative Water Pressure Resistance	3.5 bar (EN 12390-8)
Water Vapour Permeability	Class I permeable, V 6.37 g/m2 day, SD 3.29 m (EN ISO 7783-1/-2)
Capillary Water Absorption	0.01 kg/m2 h0.5 (EN 1062-3)
CO2 Permeability	SD 545 m (EN 1062-6)
Freeze/Thaw Resistance	Very good, scaling 0.03 kg/m2 (SS 137244)
Sulphate Resistance	High resistance, expansion 0.01% (ASTM C-1012)
Chloride Ion Diffusion	Very low ingress (ASTM C-1202)
Tensile Strength	1.3 +/- 0.1 MPa (UNE 53510)
Elongation at Break	59 +/- 5% (UNE 53510)
Bending Test on 8mm Reinforcement	20% elongation, without fissures (ASTM A 615)
Crack Bridging	Class A3 at 20C; Class A4 at 20C with DRIZORO MESH 58 (EN 1062-7 Method A)
Adhesion to Concrete at 28 Days	1.0 MPa or greater (UNE-EN 1542); 2.0 MPa (ASTM D 4541)
Classification Beneath Ceramic Tiling	CM P O2 (UNE EN 14891)
Abrasion Resistance	Taber wearing index 0.26 at 500 cycles, 0.16 at 1000 cycles (ASTM D-4060)
Potable Water Contact	Approved (European Directive 2020/2184 and Spanish RD 03/2023)
Potable Water Contact (UK)	Approved (BS-6920)
Minimum Application Temperature	Above 5C substrate and ambient
Optimum Application Temperature	5C to 35C
Pot Life	30 to 40 minutes at 20C, 50% RH
Waiting Time Between Coats	Minimum 12 to 16 hours, maximum 24 hours at 20C, 50% RH
Drying Time	24 hours at 20C, 50% RH
Cure Before Covering with Ceramic Tile, Plaster or Earth/Gravel	7 days at 20C, 50% RH
Cure Before Permanent Water Contact	14 days at 20C, 50% RH
Number of Coats	Two
Thickness Per Coat	Approx. 1mm
Consumption	1.0 to 1.5 kg/m2 per coat, 2.0 to 3.0 kg/m2 total
Mixing	Low speed drill at 400-600 rpm for 2-3 minutes, rest 5 minutes, then remix briefly
Spray Set Up	3-4mm nozzle at 3.5-5.0 bar
Colours and Textures	Grey and white, both in standard and smooth textures
Pack Sizes	Standard texture 35kg and 7kg sets; smooth texture 32kg and 7kg sets
Shelf Life	12 months unopened, stored dry at 5C to 35C, protected from humidity, frost and direct sunlight

Frequently asked questions

View all FAQs

Where can I use Maxseal Flex?

Compatibility
Maxseal Flex is a flexible 2-component cementitious membrane for swimming pools, water tanks, basements, bathrooms, balconies, terraces, planter boxes, and retaining walls - any structure needing flexibility plus waterproofing.
What's the coverage rate?

Performance
Apply 2.0-3.0 kg/m² total in two crossed coats at 1.0-1.5 kg/m² per coat (approximately 1mm per coat). Coverage depends on substrate porosity.
How is it mixed?

Installation
Maxseal Flex is two-component - Component A liquid acrylic resin plus Component B cement powder. Mix Component A first, then slowly add Component B while mixing with a slow-speed drill until homogeneous.
Recoat window between coats?

Compatibility
Apply the second coat between 16 hours minimum and 3 days maximum after the first. If exceeded, dampen the surface and apply a third refresh coat.
Standards compliance?

Compliance
CE marked. Typically certified to EN 14891 (waterproofing under tile adhesives) and EN 1504-2 (concrete protection). Refer to the linked TDS for full Declaration of Performance.

Why trade professionals choose Drizoro

Drizoro is a Spanish manufacturer of cement based waterproofing and concrete repair products, supplied to the Australian trade through The Waterproofing Shop. The range on this site covers Maxseal Foundation and Maxseal Flex, along with repair mortars, grouts, joint products and mesh, used on concrete and masonry where water has to be held back rather than simply shed. Choosing between the rigid and the flexible grade is the key decision, and it comes down to the substrate, the direction of the water and how much movement the structure is likely to see.

Shop all Drizoro