Sikaflex® 508
Application

Sikaflex® 508 is a low modulus multipurpose sealant for internal and external applications. It adheres well to a wide variety of substrates and is especially compatible with foamed polystyrene foams (XPS).

Description

A low emission single-component isocyanate free sealant based on the Sika Silane Terminated Polymer (STP) technology. Sikaflex®-508 meets the most severe environment, health and safety standards and sets a new benchmark in this technology. The product cures on exposure to atmospheric humidity to form a durable elastomer.

Features and benefits:

  • Very low emission.
  • Compatible with foamed polysterene (XPS).
  • Bonds well to a wide variety of substrates without the need for special pre-treatments.
  • Easy to process.
  • Low odour.
  • Isocyanate, phtalate, plasticizer, solvent and PVC free.

Application:

Sikaflex® 508 is a low modulus multipurpose sealant for internal and external applications. It adheres well to a wide variety of substrates and is especially compatible with foamed polystyrene foams (XPS).

General information

Uniclass 2015

Pr_30_31_76_16 Construction joint sealantsPrimary

CAWS

F11/116 Mortar jointed, sealant pointed glass block walling

F11/121 Sealant jointed glass block walling

F11/141 Sealant jointed glass block walling

F11/410 Perimeter/ Expansion joints with sealant

F30/610 Movement joints with sealant

F30/76 Movement joints with sealant

H11/772 Curtain walling joint assembly sealants

H11/777 Weathersealing for structural sealant/ bonded glazing

H13/740 Sealant joints

H30/160 Profiled plastic sheet rooflights or wall lights

H30/234 Gutters

H30/246 Steel lining

H30/247 Steel lining

H31/110 Metal

H31/120 Metal

H31/160 Profiled plastics sheet

H31/234 Gutters

H31/240 Lining

H31/241 Lining

H32/110 GRP

H32/111 PVC-U

H32/115 Polycarbonate

H32/120 Plastics

H41/655 Sealant jointing proprietary system

H42/661 Sealant joints

H43/150 Profiled plastics sheet

H43/160 Profiled plastics sheet

H43/234 Gutters

H51/610 Sealant jointing

H51/630 Sealant movement/ Other joints

H71/770 Wedge fixing into joints/ Chases

H71/780 Wedge fixing into damp-proof course joints

H71/790 Screw fixing into joints/ Chases

H72/770 Wedge fixing into joints/ chases

H72/780 Wedge fixing into damp-proof course joints

H72/790 Screw fixing into joints/ chases

H73/770 Wedge fixing into joints/ chases

H73/780 Wedge fixing into damp proof course joints

H73/790 Screw fixing into joints/ chases

H74/770 Wedge fixing into joints/ chases

H74/780 Wedge fixing into damp proof course joints

H74/790 Screw-fixing into joints/ chases

H75/770 Wedge fixing into joints/ chases

H75/780 Wedge fixing into damp proof course joints

H75/790 Screw-fixing into joints/ chases

L10/75 Sealant joints

L10/810 Sealant joints

L20/80 Sealant joints

L20/820 Sealant joints

M40/75 Sealant movement joints

M40/805 Sealant movement joints with metal edgings

M40/815 Sealant movement joints

M41/455 Sealant movement joints with metal edgings

Specification data - Construction joint sealants

Product Reference

Sikaflex® 508

Standard product features

Chemical base:

Silane terminated polymer.

Colour:

Black.

Technical characteristics:

  • Cure mechanism: Moisture-curing.
  • Density: 1.5 kg/L.
  • Non-sag properties: Good.
  • Application temperature: Ambient 5–40°C.
  • Skin time (to QP019-1): 50 minutes (at 23°C/ 50% r.h.).
  • Shrinkage: 1%.
  • Shore A hardness (to CQP023-1/ ISO 7619-1): 35.
  • Tensile strength (to CQP036-1/ ISO 527): 1.5 MPa.
  • Elongation at break (to CQP036-1/ ISO 527): 250%.
  • Tear propagation resistance (to CQP045-1/ ISO 34): 4 N/mm.
  • Service temperature (to CQP513-1): -50 to +80°C.

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