EverBuild Everflex 450 Premium+ Builders Silicone - Buff 300ml - In-Excess Direct

EverBuild Everflex 450 Premium+ Builders Silicone - Buff 300ml

Everflex 450 Builders Silicone is a premium quality neutral cure silicone sealant that adheres to virtually all surfaces. Typically used for construction expansion joints and perimeter pointing of all types of door and window frames.

  • Contents: 300ml Tube
  • Colour: Buff
  • Interior & Exterior Use
  • Waterpoof
  • Adheres to most surfaces
Technical Data & Application


  • Excellent adhesion - adheres to most common surfaces including glass, metals, plastics and wood
  • Low dirt pick up - important in PVCu work
  • Excellent flexibility - +/- 25%
  • High resistance to plasticiser migration - may be used over water based and solvent based paints
  • Excellent external weathering properties
  • Suitable for use on polycarbonate

Areas For Use

  • Perimeter pointing internally and externally around PVCu /wood and all other window frames
  • Sealing and as an adhesive onto PVCu, plastic trims and components
  • Bedding insulated glass units in accordance with relevant clauses of BS8000 Part 7
  • Suitable as an expansion joint sealant
  • Weather sealing and joint sealing to pre-formed panels
  • Sealing soft metals such as lead, copper and zinc
  • General glazing sealing and draughtproofing, including repair work over existing sealant
  • Glass to glass and glass to aluminium sealing
  • Parapet and roof weather sealing applications


  • Do not use in conjunction with bitumen asphalt, neoprene and certain organic elastomers
  • Do not use in the manufacture of Aquariums
  • Do not use on substrates that bleed oil, solvents or plasticisers
  • Non overpaintable
  • Use as a mirror adhesive; Not recommended

Surface Preparation
The surfaces to be must be clean, dry and free from dust, grease and other contaminants.

Cut the tip of the cartridge taking care not to damage the thread. Apply nozzle and cut at an angle of 45 degrees with an opening slightly larger than the gap to be sealed. Apply using a standard sealant gun. Best results will be obtained by keeping an even pressure on the trigger and keeping the gun at a constant angle to the surface being sealed. To ensure a proper bond, always smooth the sealant down with a spatula or piece of wood. An improved joint appearance can be achieved by placing masking tape to both sides of the joint, removing within 5 minutes of application.

    Store in original unopened containers between 15 and 30 C

    Shelf Life
    18 months from date of manufacture

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