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Silicone 825

Third party certifications:
  • QA Certificate

    QA Certificate

    Certificate type

Sika Limited

Low modulus, neutral cure, alkoxy, odourless silicone sealant.

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+44 (0)1707 394444 www.sika.co.uk
Application

  • Perimeter pointing internally and externally around PVC-U/ wood and powder-coated aluminium.
  • Sealing and as an adhesive onto PVC-U, plastic trims and components.
  • Sealing soft metals such as lead, copper and zinc.
  • Weather sealing and joint sealing to pre-formed panels and curtain walling, glazing sealing and draught proofing.
  • Glass-to-glass and glass-to-aluminium sealing.
  • Parapet and roof weather sealing applications.
  • Suitable as an expansion joint sealant.
  • Bedding and sealing of insulated glass units.

Description

Low modulus, neutral cure, alkoxy, odourless silicone sealant that adheres to a wide range of both porous and non-porous surfaces without the need for priming.

Features and benefits:

  • Tooling and slow skinning properties are suitable for large scale construction and glazing applications.
  • High adhesion – adheres to most common surfaces including glass, metals, plastics and wood (painted or unpainted), un-plasticised polyvinyl chloride (PVC-U) and polycarbonate.
  • Excellent external weathering properties (over many years exposure).
  • High viscosity, non-slump formula.
  • Resistant to fumed hydrogen peroxide and fumed formaldehyde.

Applications:

  • Perimeter pointing internally and externally around PVC-U/ wood and powder-coated aluminium.
  • Sealing and as an adhesive onto PVC-U, plastic trims and components.
  • Sealing soft metals such as lead, copper and zinc.
  • Weather sealing and joint sealing to pre-formed panels and curtain walling, glazing sealing and draught proofing.
  • Glass-to-glass and glass-to-aluminium sealing.
  • Parapet and roof weather sealing applications.
  • Suitable as an expansion joint sealant.
  • Bedding and sealing of insulated glass units.

Approvals:

  • Certified to ISO 11600 F25LM and G25LM.
  • SNJF 25E for glazing and facade (primed aluminium and un-primed glass and mortar).
  • CE marked under EN 15651 for cold climate, facade, glazing and sanitary applications.

General information
Uniclass 2015
Pr_30_31_76_33 Glazing compounds and sealantsPrimary
CAWS

H30/160 Profiled plastic sheet rooflights or wall lights

K10/245 Ceiling lining on timber

L20/820 Sealant joints

L40/310 Bead-fixed single-glazing

H42/661 Sealant joints

H73/780 Wedge fixing into damp proof course joints

M21/85 Sealant joints

H32/120 Plastics

H43/150 Profiled plastics sheet

H43/234 Gutters

K10/215 Suspended ceiling system

L40/496 U-profiled double-glazing

L40/230 Bead-fixed single-glazing

L40/250 Bead-fixed single-glazing

H71/780 Wedge fixing into damp-proof course joints

F11/121 Sealant jointed glass block walling

L40/372 Bead-fixed insulating glass units

L40/350 Bead-fixed single-glazing

F11/410 Perimeter/ Expansion joints with sealant

L40/380 Bead-fixed insulating glass units

M20/653 Sealant movement joints with stop bead edgings

F11/141 Sealant jointed glass block walling

H74/780 Wedge fixing into damp proof course joints

H41/655 Sealant jointing proprietary system

F30/610 Movement joints with sealant

M40/75 Sealant movement joints

P31/40 Sealing around services

M40/815 Sealant movement joints

H75/780 Wedge fixing into damp proof course joints

H30/246 Steel lining

L20/80 Sealant joints

H72/770 Wedge fixing into joints/ chases

H32/115 Polycarbonate

F30/76 Movement joints with sealant

H11/772 Curtain walling joint assembly sealants

H13/740 Sealant joints

H72/780 Wedge fixing into damp-proof course joints

H74/770 Wedge fixing into joints/ chases

H71/790 Screw fixing into joints/ Chases

H31/120 Metal

H74/790 Screw fixing into joints/ Chases

P31/710 Sealing

H11/777 Weathersealing for structural sealant/ bonded glazing

L40/381 Bead-fixed insulating glass units

H51/610 Sealant jointing

H31/240 Lining

H71/770 Wedge fixing into joints/ Chases

H32/111 PVC-U

H75/790 Screw fixing into joints/ Chases

H31/110 Metal

L40/495 U-profiled single-glazing

H32/110 GRP

L10/75 Sealant joints

H43/160 Profiled plastics sheet

L10/810 Sealant joints

H31/241 Lining

H72/790 Screw fixing into joints/ chases

M21/530 Sealant joints

H30/234 Gutters

F11/116 Mortar jointed, sealant pointed glass block walling

H51/630 Sealant movement/ Other joints

H73/790 Screw fixing into joints/ Chases

H31/160 Profiled plastic sheet rooflights and wall lights

L40/330 Bead-fixed single-glazing

H30/247 Steel lining

H31/234 Gutters

H73/770 Wedge fixing into joints/ Chases

K10/220 Proprietary suspended ceiling system

H75/770 Wedge fixing into joints/ Chases

Specification data - Glazing compounds and sealants
Product Reference

Silicone 825

Colour

Anthracite

Beige

Black

Brick Red

Brown

Buff

Dark Anthracite (RAL 7016)

Dark Grey

Limestone White

Magnolia

Mid Grey

Portland Stone

White

Standard product features

Chemical base:

Alkoxy silicone.

Technical characteristics:

  • Service temperature: -50°C to 150°C.
  • Density: 1.33–1.37 g/cm³.
  • Ambient air temperature: +5°C to +40°C.
  • Shore A hardness (to ISO 868): 20–30.
  • Shrinkage (to ISO 10563): <5%.
  • Tensile modulus at 23°C (to ISO 8339): 0.25–0.3 MPa (at 100% elongation).
  • Tensile adhesion strength (at break): 0.5 MPa.
  • Compressive modulus 100% (to ISO 11432): 0.35 MPa.
  • Movement capability (to ISO 11600): ±25%.
  • Elastic recovery (to ISO 7389): >80%.
  • Skinning time: 30–45 minutes.
  • Curing rate: ~2.0 mm/ 24h; ~6 mm/ 72h; ~9 mm/ 168h.
  • Elongation at break at 23°C (to ISO 8339): >200%.

Third party certifications
  • DoP: Certificate: 825/1-CPR/2014
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