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A general purpose silicone for small sealing jobs

Product overview

Bostik General Purpose Silicone is an industrial grade, neutral cure silicone sealant designed for sealing lap joints in metal guttering, aluminum, roofing, flashings and down pipes.

  • General-purpose sealant for small sealing applications
  • Permanently flexible
  • Suitable for interior and exterior applications
  • Unaffected by rain, snow, extreme temperature change and constant ultraviolet exposure
  • Waterproof
  • Excellent adhesion properties

Bostik General Purpose Silicone is suitable for: 

  • Mounting around windows & doors frames
  • Lap joints in metal guttering
  • Bonding all panels (OSB, word, plasterboards, drywalls, insulation board)
  • Bonding masonry (windowsill, brick wall) and decorative elements
  • Gap filling around pipes, penetration surfaces and more
  • All materials except for PE, PP, PC, PMMA, PTFE, soft plastics, neoprene, and bituminous substrates

LIMITATIONS: Not suitable for permanent water load or filling in cavities with insufficient moisture.



  • bostik DIY australia badges interior and exterior
    Interior and exterior
  • Bostik DIY picto Australia highly flexible
    Highly flexible
  • Bostik DIY picto Australia temperature resistant
    Temperature resistant
  • bostik DIY australia badges water resistant
    Water resistant
  • bostik DIY australia badges uv resistant
    UV resistant

Documents and Resources


Ensure all surfaces that will be in contact with the sealant are clean, dry, and free of dust, dirt, rust, oil, and other contaminants.

Non-porous substrates should be clean with solvent and wipe dry immediately with cloth before the solvent evaporates from the surface. Porous surfaces should be roughening with a stiff-bristled brush, rubbed down or sandblasted.

Complete all painting before applying. Use masking tape each side of the joint to simplify clean up and protect surfaces. 


  • Unscrew cap and pierce end of tube with reverse end of cap to open. 
  • Apply on surface in steady flow by hand pressing.
  • Tool off/smooth off before skin forms. 
  • If used, remove masking tape immediately until sealing tolling is complete. 
  • Sealant surface will skin in approx. 10 minutes and is touch dry in 30 minutes.
  • Content fully cures in 48 hours.


  • Remove excess uncured sealant with a mineral turpentine-soaked cloth.
  • Fully cured excess sealant can be removed by trimming with a sharp knife.

Oxime silicone sealants (both standard and sanitary grade versions containing fungicide) will tend to display a slight colour shift with age and exposure to ultraviolet light.  Typically this colour shift, or yellowing, is not visually significant in the field.  Also it is not necessarily confined to translucent coloured materials, and the fungicide itself does not have any adverse impact.  This is a worldwide phenomenon affecting this cure type of silicone sealant.

Misapplication or contamination of an oxime sealant whilst curing will exacerbate the inherent condition.  Specifically, chemical exposure to certain agents such as chlorinated cleaning solutions (ie, bleach), chemical solvents, and the fumes of some paints (enamel or solvent – containing types where not fully dried) may tend to magnify this yellowing change particularly where the sealant is still curing.