Seal-it® 218 SILICON-CL

Seal-it® 218 SILICON-CL is a fungicidal and neutral-curing sealant that is available in many colours, for structural, glazing, façade and sanitary joints, that is based on silicone technology and moisture-cures into a durable rubber that retains its elasticity.



  • Specially designed for projects that require joint seals in specific colours for aesthetic reasons.
  • Fungicidal joint sealant in sanitary spaces and other spaces with plumbing fixtures, such as bathrooms, showers, toilet rooms, saunas, kitchens, cold storage units, slaughter halls and washing and laundry rooms.
  • Seal connecting and dilation joints between building components made from concrete, stone, masonry, stainless steel, plastic, PVC, polycarbonate, steel, coated and anodised aluminium, wood, composite and glass in façade and interior structures.
  • Top and bead seals for insulating and laminated glass, in accordance with NEN 3576/NPR 3577.
  • Joint sealant for sections, window and door frames, panels, boards and other building components.
  • Repair compound for glazing, sanitary, façade and other joints, based on silicone.


  • Durable, retains elasticity, maximum movement capacity of 25%.
  • Excellent adhesion and working properties, versatile.
  • Neutral, low-odour, acid-free and non-shrink curing, CE-certified silicone system.
  • For orders starting from 1 cartridge, fast delivery within a few working days, in all NCS and RAL colours.
  • Meets requirements for intruder-resistant glass, in accordance with the Secure Home Police Label (the “Politie Keurmerk veilig wonen”).
  • Fungicidal in accordance with ISO 846.
  • Good resistance to discolouration, UV, weather, water, moisture, cleaning products and ageing.
  • Non-corrosive to metals.
  • Compatible in direct contact with PVB-laminated glass and edge seals on insulating glass.
  • Free of solvents and organic plasticisers.
  • Very low emission: certified VOC emission class A+.

Application conditions

  • Application temperature (ambient and surface) between +5°C and +40°C.
  • On stable, compatible, dry, clean, uncontaminated, grease-free and dust-free surfaces.
  • Ensure proper joint dimensions, for proper absorption of any movements.
  • Use a suitable brush to remove any loose particles from the surface.
  • Degrease the surface properly using Seal-it® 510 CLEANER.
  • Seal-it® 218 SILICON-CL has a broad bonding spectrum, but highly porous surfaces should be pre-treated with Seal-it® 520 PRIMER and non-porous surfaces with minimal bonding should be treated with Seal-it® 525 Clean & Bond.
  • Use Seal-it® 550 FINISH to apply a smooth and tight finish, before skin formation.

Standard product line


310ml cartridge

Available in all NCS and RAL colours


SI-XXX-XXXX-XXX = Article number.
Other colours and/or packaging on request.


  • EN 15651-1: F-EXT-INT-CC 25LM
  • EN 15651-2: G-CC 25LM
  • EN 15651-3: S-XS1
  • EN 15651-4: PW-EXT-INT-CC 25LM
  • VOC emission class A+

Technical support department

Connect Products has a state-of-the-art R&D laboratory, where experienced specialists continuously research and develop sealants, adhesives and PU foams. Customers and clients can have products researched, tested and developed by this department. You can also contact us for technical advice, tips, project support, warranty certificates, requests and other technical questions. We will be happy to assist you with high-quality technology.

Call us on +31 (0)183 731 400 or send us an e-mail.

Product selector

Click on one of the Seal-it® or Cover-it® categories for extensive product information on applications, properties, the standard product line, application conditions, test reports, certificates and technical and safety data sheets.