Drizoro MAXSEAL SUPER
MAXSEAL® SUPER is a special waterproofing coating made of a mixture of cements, carefully controlled aggregates and special organic and inorganic additives. Its special formula improves the osmotic effect of the application allowing the penetration into the concrete through its capillary system. The product crystallizes inside sealing, waterproofing and protecting the concrete structure. It has been designed to be applied on fresh or set concrete, pre-cast concrete, concrete blocks or cement plasters but is also suitable for applications in bricks and masonry.
1.1. ADVANTAGES FOR MAXSEAL® SUPER
This cement-based osmotic system is a one-component, cement-based, waterproof and protective coating applied in thin layers, i.e. up to 1 mm per layer, which achieves the following properties:
Excellent waterproofing properties. Withstands very high positive and negative hydrostatic pressure.
High adhesion and compatibility with common substrates used in construction. Does not require bonding agents and must be applied on wet surfaces. It fills and seals the pores of the substrate and becomes part of the structure of the surface.
Joints or connections are not required – leaking risk is avoided.
Permeable to water vapour – it allows the substrate to breathe. A vapour barrier is not formed.
High resistant to abrasion and UV rays. High durability, similar to concrete.
Provides very good chemical protection of concrete against atmospheric pollution, de-icing salts, soil salts, chlorides, seawater and carbon dioxide, thereby preventing the carbonation and electrochemical corrosion of reinforcements.
No solvents or toxic components are used. Environmentally friendly and it is a suitable material for coating of drinking water tanks
Easy and quick to be applied manually or even by spray, with labor savings and less work required.
MAXSEAL® SUPER is non-toxic, non-flammable
1.2. APPLICATION PROCEDURE FOR MAXSEAL® SUPER
Application by brush, broom or spray Mix just with water between 6 and 7 litres per each 25 kg bag, either manually or preferably by slow speed drill (400 – 600 rpm). Applications made at high temperature or sprayed, the water ratio can be increased slightly. For standard applications, MAXSEAL® SUPER can be applied with a fibre type brush or broom such as our MAXBRUSH or MAXBROOM .
Apply a thick layer to form a continuous and uniform coating; do not spread as if it were paint, apply only in one direction, the second coat should be spread in cross direction. Consumption is between 1 and 1,5 kg/ m2 per coat, for a total consumption of about 2 – 2,5 kg/ m2.
Waiting time between coats is from 6 – 8 hours minimum to 24 hours maximum. It can be also sprayed by means of a shotcreeting equipment. For applications made by spray which will be later subjected to water pressure, and in order to ensure a complete coverage of the surface, it is recommended to slide the broom over the material which has just been sprayed.
Application by dusting
MAXSEAL® SUPER can also be dusted on the lean concrete and the steel reinforcements procedure will not only protect the reinforcement itself but will prevent the rising dampness into the foundation slab.
The lean concrete should be dampened until saturation and MAXSEAL® SUPER will be dusted using between 1,5 to 2,5 kg/ m2.
Concrete for foundation slab can be poured after one hour, once MAXSEAL® SUPER has hardened and adhered to the lean concrete, endeavoring not to damage the previous application.
Application by dusting and power trowel
For this case, the application is performed on the fresh concrete, after leveling, and has enough strength to be walked over, but still fresh enough to dampen the surface when troweled.
The product is spread in powder form as supplied at a ratio of 1,5 to 2,5 kg/m2, endeavouring to achieve a complete and uniform coverage. Immediately after the surface is hosed down to prevent the superficial drying of the slab and to make the power troweling smoother.
The troweling will provide a monolithic waterproof layer, which can be slightly dampened during this operation to improve the penetration and to prevent an excessively quick drying, which would prevent proper hydration of MAXSEAL® SUPER.
Singular spots such as columns, penetrating pipes, corners, concrete joints, and expansion joints should be treated and sealed prior to general application.
2. MAXSEAL SUPER vs. BENTONITE CLAY MEMBRANE
Water is able to migrate beneath membrane (bentonite and rubber combination sheets), making it is difficult to locate leakage in bentonite.
MAXSEAL® SUPER membrane becomes part of the substrate, i.e. any cement-based waterproofing mortar is fully bonded, making it very easy to locate any leak. Failures are readily accessible and relatively easy to repair.
Sealing of seams (workmanship) is critical to performance of bentonite membrane system. No seams are required with the MAXSEAL® SUPER waterproofing osmotic mortar.
Penetrations and other out-standing points require careful flashing and sealing. Penetration and other out-standing point can be sealed in an easy way by using a flexible waterproofing mortar such as MAXSEAL® FLEX reinforced with a fibreglass mesh.
Bentonite clay membrane is susceptible to physical damage during constructions. MAXSEAL® SUPER – There is no risk or puncture or other damages during application as this material goes into the capillarity network of concrete.
Bentonite clay membrane does not readily conform to complex shapes.
Prior to application of a bentonite membrane (sheets/panels/textile mats), the moisture on concrete surface m u st not exceed a high level. Generally, during application of any bentonite membrane, high levels of moisture on concrete surface are N O T tolerated because this water initiates the reaction, substrate must be dry. Cement-based coatings require moisture on the substrate surface. Cement-based coating does not have any limitation on maximum relative humidity conditions.
Large single-sheet membranes are heavy and difficult to hold in place on vertical wall application.
MAXSEAL® SUPER by dusting process (dry-shake method or MAXSEAL® FLEX can be apply easily by brush, broom, spraying method even for large horizontal surfaces.
Application process for bentonite membrane can be tricky, requiring and careful positioning of the sheets/panels. Application process for MAXSEAL® SUPER is very easy and no specialized hand-labor or special tool or equipment is required.
Hydration and swelling for bentonite clay must occur within a confined area for the waterproofing properties to be effective. Care must be taken in design and construction to allow for adequate space for clay swelling
Bentonite panel systems require time (activation time) for degradation of cardboard before swelling and water-tightness occurs. This can allow water to penetrate a structure before swelling occurs.
Bentonite clays are NOT particularly resistant to chemicals in groundwater such as brines, acids, or alkalis.
Bentonite clay systems are extremely sensitive to weather during installation. Immediate protection of bentonite applications is required to keep material from water sources. If rain occurs or ground water levels rise and material is wetted, hydration will occur prematurely and waterproofing capability will be lost, since hydration will occur in an unconfined space.
This Technical Note aims to make a comparative study between the cement-based waterproofing system composed of MAXSEAL® SUPER and bentonite clay membranes (sheets/panels/textile mats). Generally bentonite clay product-based systems show a lot of leaking problems which are localized in areas such as joints, penetrating pipes and drains. Also, mechanical damage such as punching, cracks or tearing can be expected.
In order to solve the above drawbacks, a cement-based waterproofing system is a highly recommended option. MAXSEAL® SUPER provides a watertight coating with high mechanical properties and chemical resistance regardless of whether an uneven surface is present or, UV radiation exposure or chemical attack is expected.
Unlike the use of a bentonite clay membrane, a continuous fully bonded material such as MAXSEAL® SUPER ensures a completely watertight monolithic waterproofing application
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This NOTA TÉCNICA / TECHNICAL NOTE MAXSEAL® SUPER DEPARTAMENTO TÉCNICO / TECHNICAL DEPARTMENT R-IT-06/02 NT_095_00