Product Data Sheet Show all documents

SikaTop®-550 Seal

(former MSeal 550)

Acrylic cementitious waterproofing coating 

SikaTop®-550 Seal is a two-component, acrylic modified, cementitious coating that requires on-site mixing, forming a product to waterproof and resurface concrete, masonry, and other suitable construction materials.     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
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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.
  • White colour version can be used as a backing to marble and granite to prevent water ingress and thus alleviate 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.
 

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

Standard colours:

  • Light Grey
  • White 
  • Grey

Contact your local Sika company for advice on locally available colour options.

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

Composition

Component A: Powder
Component B: Liquid

Shelf life

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)

Product declaration

Specially selected cements, silica sand and reactive fillers
Technical Information

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.

Water penetration under pressure

Nil

(BS EN 12390 Part 8: 2009)

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.

Permeability to carbon dioxide

> 50 m

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

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. 

Water permeability

< 0.1 kg (m2xh0.5)

(BS EN 1062-3: 2008)

Chloride Ion Ingress

Not measurable after 24 months of testing

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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