WACKER® CS – CONSTRUCTION SEAL SEILICONE SEALANT

Short Description:

WACKER® CS – CONSTRUCTION SEAL is a one-component, neutral-curing, low modulus silicone sealant with outstanding adhesion, long shelf life and excellent tooling characteristics for construction, glass and window building.

WACKER® CS – CONSTRUCTION SEAL cures at room temperature in the presence of atmospheric moisture to give a permanently flexible silicone rubber.


Product Detail

Product Tags

Features &Benefits

  • -excellent weatherability
  • -excellent tooling characteristics for professional use
  • -non-corrosive to metals
  • -suitable for alkaline substrates such as concrete, mortar, fibrous cement
  • -matt finish
  • -excellent adhesion on most substrates without primer
  • -solvent-free, thus featuring low volume shrinkage during vulcanization
  • -ready gunnability at low (+ 5 °C) and high (+ 40 °C) temperatures
  • -flexible at low (-40 °C) and high temperatures (+150 °C)
  • -almost odorless
  • -non-sag

Applications

-Exterior Applications

-Silicone Sealants WACKER Brand

 

Application fields

  • sealing of connection and expansion joints in the building industry
  • sealing of perimeter joints
  • sealing of joints between glazing and supporting structures (frames, transoms, mullions)

 

Processing

The substrate areas that will be in contact with the sealant must be clean, dry and free of all loose material, dust, dirt, rust, oil and other contaminants. Non-porous substrates should be cleaned with a solvent and a clean, lint-free, cotton cloth. Remove residual solvent before it evaporates with a fresh clean, dry cloth.

For application from cartridges cut thread open, fix nozzle on top and cut to required bead size. The sealant can be applied in beads or layers. It requires moisture in order to cure. The curing time can take longer at lower temperatures, lower humidity or by low volume of air exchange.

The use of tooling agents should be avoided if possible. Otherwise, water or a diluted solution of a little neutral soap or alcohol in water should be sparingly applied.

 

Certification

WACKER® CS - CONSTRUCTION SEAL is certified and classified according to

  • ISO 11600 F/G, Class 20 LM
  • EN 15651-1, Class 20LM F-EXT-INT-CC
  • EN 15651-2, Class 20LM G-CC
  • ASTM C920, Class 35

 

Adhesion

WACKER® CS - CONSTRUCTION SEAL exhibits excellent primerless adhesion to many substrates, e.g. glass, tiles, ceramics, enamel, glazed tiles and clinker e.g. aluminium, steel, zinc or copper wood, and many plastics. Users must carry out their own tests due to the great variety of substances. The adhesion can be improved in many cases by pretreatment of the substrates with a primer. If adhesion difficulties arise please contact our technical service.

 

Restrictions on use

It is the user's responsibility to test the compatibility of the sealant with the adjoining materials. Incompatible substances like coating materials (paints, varnishes and glazes) or organic plasticizer containing rubbers (EPDM, butyl and neoprene) can lead to discoloration or other impairments like loss of adhesion of the sealant. Materials in direct contact with the applied sealant like cleaning agents and materials in indirect contact like gaseous emissions can damage the sealant in its function or change its appearance. Because of the multitude of these materials Wacker cannot make a general statement to the compatibility of materials with the sealant. In case of doubt the user shall conduct appropriate preliminary tests. The time until complete curing may be extended at lower temperature, lower humidity, increasing film thickness or by low volume of air exchange. Otherwise, water or a diluted solution of a little neutral soap or alcohol in water should be sparingly applied.

WACKER® CS - CONSTRUCTION SEAL must not be used for insulating glass applications.

WACKER® CS - CONSTRUCTION SEAL is not recommended for structural glazing bonding.

WACKER® CS - CONSTRUCTION SEAL may be discolored in contact with some organic elastomers, e.g. EPDM, APTK and neoprene.

WACKER® CS - CONSTRUCTION SEAL is not recommended for use on natural stones, such as marble, granite, quartzite, as it can cause staining. In this case use an alternative grade such as WACKER® 460 - NATURAL STONE.

WACKER® CS - CONSTRUCTION SEAL is not recommended for sealing of aquaria or for long term use under water

WACKER® CS - CONSTRUCTION SEAL is not suitable for food grade applications where the joints are likely to come in contact with food. For this application WACKER® 120 - FOOD AND WATER has been developed

WACKER® CS - CONSTRUCTION SEAL is not suitable for use as a mirror adhesive.

How to Use

Properties Uncured

Property
 
Condition
 
Value
 
Method
 
Skin forming time 23 °C | 50 % r.h 15 - 25 min -
Density 23 °C 1.40 g/cm³ ISO 1183-1 A
Consistency - non-sag  ISO 7390, profile U 20
Extrusion rate - mass flow 6 bar | 23 °C 130 g/min -

These figures are only intended as a guide and should not be used in preparing specifications.

 

Properties Cured

 
Property
 
Condition
 
Value
 
Method
 
Movement capability - 20 % ISO 11600
Movement capability - 35 % ASTM C920
Modulus at 100 % elongation - 0.40 N/mm² ISO 8339
Modulus at 100 % elongation - 0.38 N/mm² ISO 37
Elongation at break - 250 % ISO 8339
Elongation at break - 560 % ISO 37
Hardness Shore A - 22  ISO 868
Tensile strength - 0.50 N/mm² ISO 8339
Tensile strength - 0.38 N/mm² ISO 37

These figures are only intended as a guide and should not be used in preparing specifications.

Packaging & Storage

 Storage

 

The 'Best use before end' date of each batch is shown on the product label. Storage beyond the date specified on the label does not necessarily mean that the product is no longer usable. In this case however, the properties required for the intended use must be checked for quality assurance reasons.

 


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