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Premium Natural Stone Silicone Matt

FA880 is a one component, low slump silicone completely free of any ingredients likely to cause migratory staining to natural stone. It is neutral curing for safe sealing of stonework & has a matt finish. Contains fungicide.


FA880 has been formulated for the long term elastic sealing of movement joints between natural stone such as granite, slate, terrazzo, porphyry, limestone, travertine, sandstone, quartzite, marble, etc., as well as for joints with other construction materials like concrete, ceramics, metals, glass, PVC and primed wood.

  • A high performance silicone sealant developed specifically for the sealing of natural stone whereby illbruck guarantees no migratory staining
  • Superb matt finish
  • Good resistance to UV light, ageing and weathering
  • Contains fungicide to prevent mould growth - suitable for sanitary & swimming pool surround applications
  • Rapid curing formulation - skins within 10 - 20 minutes
  • Chemically neutral, not corrosive and very low odour
  • Compatible with most construction materials

Usage Guidelines

  • Use a high quality geared sealant gun to expel the sealant consistently. Cut cartridge nozzle to desired aperture.
  • Apply sealant slightly proud of desired level, spray on illbruck smoothing agent AA301.
  • Tool off immediately using a jointing tool such as Illbruck AA311. 
  • Note: avoid making too many passes with the smoothing tool to avoid polishing the matt finish.

Technical data

ClassificationEN 15651 part 1
EN 15651 part 3
EN 15651 part 4



StainingDIN ISO 16938No migratory staining
Specific GravityBS EN1183-1B1.3
Skin Formation+23°C, 50% RHApprox. 15 minutes
Curing Rate+23°C, 50% RH3 mm in 1st Day
ShrinkageBS EN 10563Approx. 6%

Modulus at 100%

BS EN 83390.6 N/mm²
Tensile StrengthBS EN 8339Approx. 0.8 N/mm²
Elastic RecoveryBS EN 7389> 90%
Movement CapabilityISO 1160020%
Shore A HardnessBS EN 868Approx. 35
Application Temperature +5°C to +40°C
Service Temperature -40°C up to +150°C
Storage Store in shaded dry conditions between +5°C and +25°C
Shelf Life 12 months when stored as recommended in original unopened containers
FA880 Application Video

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