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Silicone Sealants

Bostik 5CLM

Bostik 5CLM is a high joint movement silicone sealant suitable for new construction work or remedial applications on façades work, including metal/aluminium composite panels. Even on buildings that have high joint movement Bostik 5CLM places minimum stress on the adhesion bond, between the silicone and the substrate, in working joint applications.

Features & Benefits:

  • Excellent prime less adhesion too many building substrates*
  • 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
  • Bostik 5CLM has excellent natural ageing stability
  • It will maintain its elastomeric joint sealant properties permanently, even under harsh conditions and temperature extremes

*Substrate test is always recommended first.


  • All types of building facades restoration and weatherproofing
  • Curtainwall joints
  • Marble & granite joints**
  • Expansion and control joints
  • Precast panels
  • Concrete panels
  • Weatherseal/weatherproofing of coated metal & aluminium composite panels
  • Anodized aluminium
  • Coated copper & brass plaques
  • Sealing of polycarbonate sheeting
  • Splashbacks
  • Expansion joints on pavers

**Stain testing must be carried out first before use on any project.