375ml Modified Silcon Sealant

High performance multi-purpose modified silicone sealant.

Silaflex MS is a tough, durable elastomeric joint sealant suitable for use in a wide range of external and internal building applications. It is based upon modified silicone polymer technology resulting in a unique combination of properties ideally suited to New Zealand climatic conditions. Silaflex MS has excellent primerless adhesion to a wide range of common building substrates as indicated below and does not stain concrete, marble and other masonry surfaces.

Silaflex MS has been formulated for sealing joints in and around concrete, brick, masonry, pre-cast panels, stone cladding, windows, doors and fibre cement sheeting. Silaflex MS bonds well to:

  • Concrete and masonry.
  • Cement plaster systems.
  • Aluminium, copper, brass and zinc.
  • Stainless, mild or galvanised steel.
  • Glass and ceramic tiles.
  • Glass reinforced plastics.
  • Fibre reinforced cement sheetings.
  • Timber, particleboard, hardboard and plywood. (Refer to Limitations sections.)
  • Butylclad rubber products - chase sealing.


  • Excellent primerless* adhesion to most common building materials.
  • Paintable any time after curing, with water-based paints.
  • Will not stain masonry, marble or other surfaces.
  • Very durable - BRANZ appraised
  • Neutral cure.
  • Highly flexible.
  • Low odour.
  • MAF approved for use in hygiene areas.

* Refer to Priming section.

Comparison with traditional systems:

CharacteristicsTraditional SystemsGeoplast Reusable Formwork
Hindrance-Modular system
ResistanceLimitedUp to 60 kN/m2
Concrete adherenceRequires dismantling agentsBeing made of plastics, GEOTUB PANEL does not stick to concrete
Protection10%The best protection for the columns until the end of the operations
PlumbingRequires long operations and it is often inaccurateQuick and accurate thanks to the external structure that allows easy shoring and plumbing
Dismantling agentsRequiredNot required. Everitt Site Supplies recommend 'Kleen Kote' protection and release formula to maintain your forms in top condition.