Fire rated calcium silicate board
RCM Siltech is a non-combustible flexible calcium silicate building board which provides superior workability due to a unique fibre reinforced formulation.
Siltech can be used in an extensive range of applications from fire rated partitions, non-combustible ceiling tiles, boiler encasing, door lining, timber frame fire rated floors/ceilings as well as an extensive range of OEM applications.
Siltech has been tested for 60 and 120-minute fire rated partitions.
BS 476: part 4 non-combustible
1200mm x 2400mm (6mm, 9mm, 12mm and 15mm)
1220mm x 2440mm (6mm, 9mm, 12mm and 15mm)
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- Fire rated to BS 476: part 4 non-combustible
- Highly flexible
- Dimensionally stable
- Extensive range of applications
- High levels of workability
- Ceiling tiles available
- Integrates with other RCM products
- Partition walling
- Flooring and ceilings
- Ceiling tiles
- Door panels
- OEM applications for improved strength and density
RCM Siltech can be drilled, screwed and nailed with conventional hand tools.
For cutting the product in any volume, we recommend the use of an RCM poly crystalline diamond Dart Blade to avoid excessive wear on other blades. Alternatively, RCM offer a complete fabrication service, please contact our technical department for details or visit our fabrication and design page here.
Suitable for the Following Construction Types
Bending Strength((Modulus of Rupture))
Modulus of Elasticity( (MoE))
Reaction to Fire
BS 476 Part 4 Non-Combustible & BS 476 Part 22
Durability((Life Expectancy - Minimum) )
Standard Board Sizes
2440 x 1220mm
6 9 12 15
Nominal Mass of Product((kg/m²))
6.9 10.3 13.8 17.3
Product Testing and Certification
Fire Reaction Tests
Siltech has been tested by Exova for 60 and 120 minute partitions
BS 476 Part 4 Non-Combustible
BS 476 part 21 and BS 476 part 22 fire rated through wall solutions
Siltech non-combustible ceiling tiles can be supplied in 600 x 600mm.
Bespoke cutting service available for all thicknesses.