Bostik 5CLM

Bostik 5CLM is a high performance architectural grade, Low Modulus, High Joint Movement silicone. It cures by absorption of atmospheric moisture to form a flexible and durable elastomeric sealant.

Technical Data Sheet

Safety Data Sheet

Safety Data Sheet

Bostik 5CLM Silicone 300ml

Areas of Use

  • All types of building facades restoration and weatherproofing.
  • Curtain wall joints
  • Marble and Granite joints *(Stain testing must be carried out first before use on any project).
  • Expansion and control joints
  • Precast panels
  • Concrete panels
  • Weather seal / weatherproofing of coated metal and Aluminium composite panels
  • Anodised aluminium
  • Coated copper and brass plaques
  • Sealing of polycarbonate sheeting
  • Splash backs
  • Expansion joints on pavers

Available Colours

This product is available in 5 colours:

  • Charcoal
  • Light Grey
  • Dark Grey
  • Beige
  • White


  • Bostik 5CLM. is a Non-staining high joint movement Silicone sealant suitable for new construction work or remedial applications on façades work, including metal/aluminium composite panels.
  • Even on building that have high joint movement, Bostik 5CLM places minimum stress on the adhesion bond, between the silicone and the substrate, in working joint application.
  • Excellent prime less adhesion too many building substrates. *(Substrate test is always recommended first)
  • Best elongation movement capabilities 100% + / -50%
  • Excellent UV stability.
  • The thixotropic nature of this product ensures that it will not slump in typical construction joints
  • Long Life Reliability Bostik 5CLM has excellent natural ageing stability. It will maintain its elastomeric joint sealant properties permanently, even under harsh conditions and temperature extremes.