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.


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)
  • Excellent 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.

Technical Data Sheet

Request Material Safety Data Sheet

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