Seal-it® 212 SILICON-AT

Seal-it® 212 SILICON-AT is a high-quality, professional, acetoxy-curing sealant for structural and glazing joints that is based on silicone technology and moisture-cures into a durable rubber that retains its elasticity.



  • Specially designed for connecting joints in buildings.
  • Sealant for aquariums, terrariums and display cases.
  • Suitable for top seals in glazing systems.
  • Seal façade components, such as sections, windows and door and window frames.
  • Versatile silicone sealant for construction and glazing.


  • Durable, retains its elasticity.
  • Top quality, 100% silicone.
  • Fast skin formation and curing.
  • Excellent adhesion on many non-porous surfaces.
  • Easy to work with, smooth application.
  • Good resistance to UV, weather, water and ageing.
  • Colour-fast, does not yellow.
  • Acetoxy-curing CE-certified silicone system.
  • High movement capacity, deformable up to 25%.
  • Free of solvents and organic plasticisers.

Application conditions

  • Application temperature (ambient and surface) between +5°C and +40°C.
  • On stable, compatible, dry, 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® 212 SILICON-AT 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


12 x 310ml cartridge

20 x 400ml foil packs

12 x 600ml foil packs


No standard stock

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


  • EN 15651-1: F-EXT-INT 25LM
  • EN 15651-2: G 25LM

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.

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