Product Data Sheet Show all documents

SikaTop®-550 Seal

(former MasterSeal® 550)

Acrylic cementitious waterproofing coating 

SikaTop®-550 Seal is a two-component acrylic modified cementitious coating that requires on site mixing to form product to waterproof and resurface concrete, masonry, and most other construction materials.
Can be applied by stiff brush, roller, or trowel, it forms a waterproof coating. SikaTop®-550 Seal provides an effective barrier to waterborne salts and atmospheric gases. 
Fluid applied, SikaTop®-550 Seal provides a hard wearing, seamless, waterproof membrane. SikaTop®-550 Seal is composed of specially selected cements, silica sand and reactive fillers supplied in powder form together with a liquid component of blended acrylic copolymers and wetting agents. Suitable for use in hot and tropical climatic conditions.

  • Easy to apply by brush or in thin trowel applications
  • No additional water required
  • Excellent adhesion to various substrates 
  • Suitable for contact with potable water 
  • Breathable - whilst repelling water, allows substrate to breathe
  • High resistance to chloride ion diffusion
  • Unlike conventional coatings which require a 7-28 day cure of concrete, SikaTop®-550 Seal can be applied to 24 hour-old concrete thereby giving immediate protection
Product Data Sheet Show all documents

Usage

  • As a waterproof lining for water retaining structures.
  • For coating seawater channels. 
  • For waterproofing and protection against brackish water.
  • As a backing to marble and granite to prevent water ingress and thus alleviate surface staining.
  • To provide protection to concrete surfaces from carbonation and chloride attack.
 
  • To provide foundation protection.
  • As a vapor barrier behind cladding.
  • For waterproofing of terraces, balconies, bathrooms and other wet areas where tiles are to be installed directly on top of the membrane using a proprietary tile adhesive. under tiling.

Advantages

  • Easy to apply by brush or in thin trowel applications
  • No additional water required
  • Excellent adhesion to various substrates 
  • Suitable for contact with potable water 
  • Breathable - whilst repelling water, allows substrate to breathe
  • High resistance to chloride ion diffusion
  • Unlike conventional coatings which require a 7-28 day cure of concrete, SikaTop®-550 Seal can be applied to 24 hour-old concrete thereby giving immediate protection

Packaging

Available in 20 kg double pack

 

Colour

Available in three standard colours:

  • Light Grey
  • White 
  • Dark Grey

Product Details

Sustainability / Certifications / Approvals

CERTIFICATES AND TEST REPORTS

  • BS 6920: Part 1 2000 - Suitable for use in contact with potable water.
  • SikaTop®-550 Seal is certified according "Low Emitting Materials as per Al Sa'fat - Dubai Green Building Evaluation System" by Dubai Central Laboratory (DCL)
Product Information

Product declaration

Specially selected cements, silica sand and reactive fillers

Composition

Component A: Powder
Component B: Liquid

Shelf life

Minimum 9 months from date of production if stored properly in undamaged and original sealed packaging.

Storage conditions

Store in original unopened packaging in cool and dry conditions between +5 °C and +35 °C. Protect from direct sunlight and frost.

Density

~ 1.82 kg/l (fresh mortar at +25°C)
Technical Information

Water permeability

< 0.1 kg (m2xh0.5)

(BS EN 1062-3: 2008)

Water penetration under pressure

Nil

(BS EN 12390 Part 8: 2009)

Permeability to carbon dioxide

> 50 m

(BS EN 1062-6: 2002 Method A)
Equivalent air layer thickness (SD)

Chloride ion diffusion resistance

SikaTop®-550 Seal provides an effective barrier to waterborne salts such as chlorides and sulphates.

Note: lndependent assessment has shown that even after 12 months constant immersion the chloride ion diffusion co-efficient could not be measured for SikaTop®-550 Seal.

Chloride Ion Ingress

Not measurable after 24 months of testing

Chemical resistance

SikaTop®-550 Seal has outstanding wear and weather resistance and good resistance to sodium hydroxide, calcium chloride, de-icing salts.
SikaTop®-550 Seal coated surfaces exhibit good resistance to mild acids.

Carbonation resistance

SikaTop®-550 Seal is an extremely effective barrier to atmospheric acidic gases which cause carbonation in concrete structures.
SikaTop®-550 Seal at an applied rate of 1.8 kg/m² gives an equivalent air layer thickness for carbon dioxide diffusion (R) of 92 m. The accepted minimum value for R is 50 m. 

Application

Application Information

Layer thickness

1 mm with constant thickness for each layer, minimum 2 layers

Ambient air temperature

+5°C min. / 45°C max.

Substrate temperature

+5°C min. / 45°C max.

Waiting time to overcoating

Waiting time between coats:

+20°C~6 hours

+30°C

~3 hours
Consumption

Consumption

~1.8 kg/m² at 1 mm thickness
Application steps

MIXING

SikaTop®-550 Seal can be mixed with a low speed (~500 r.p.m.) electric drill mixer. Shake carefully Comp. B before using. Then pour ~½ Comp. B into a suitable mixing container and add Comp. A slowly while mixing. When homogeneous, add the remaining amount of Comp. B, and mix thoroughly at least for 3 minutes, until the proper lump-free consistency is reached.
Do not add any additional water or other ingredients; each packaging unit must be entirely mixed.

CLEANING OF EQUIPMENT

Clean all tools and application equipment with clean water immediately after use.
Hardened / cured material can only be removed mechanically.

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