688 glass, metal and masonry sealant is a high performance, neutral cure silicone sealant designed for a wide range of glazing and weather sealing applications. Similar formulation to 580 in foil packaging.


  • Neutral cure
  • Very low slump, ideal for overhead joints
  • Excellent resistance to weathering and UV
  • Joint movement capability of (+/-25%)


  • General glazing sealant
  • Adheres to glass, aluminium, brick, concrete, steel, ceramic, fibreglass, rubber, enamel and painted surfaces
  • Can be used on monolithic glass, pyrolytic coatings and laminated glass
  • Cladding sealant

Note : Some applications may require the use of a specific Dow Corning primer

Note : For more information on compatibility with other products and specialist advice, please contact Glasscorp directly

Note : Customers should independently determine the suitability of this product for their specific purpose prior to use


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