Built on advanced inorganic mineral foam technology, non-flammable foams (NFF) set new standards in thermal insulation and fire protection. Easily formable for construction applications ranging from insulation boards to prefabricated elements, they provide a lightweight, durable, and cost-efficient solution. Sikatherm® NFF also provides an additional benefit - a resource-efficient production process.

Inorganic Mineral Foam Technology

Challenges related to future-oriented insulation materials, such as fire protection, insulation performance, and recyclability, were the key drivers behind the development of these groundbreaking products.

The new non-flammable foams (NFF) portfolio with Sikatherm® NFF features artificial mineral foams specifically designed for prefabrication and insulation applications across various sectors of the construction industry. It can be formed easily to boards, blocks, cavity fillers, semi-finished parts, lightweight construction parts and many other applications.

Click play to see the foam's expanding nature in a time-lapse video

What Are Non-Flammable Foams

The abbreviation “NFF” stands for “non-flammable foams” and indicates the non-flammability of the A1-classified insulation material. Sikatherm® NFF is made from inorganic foams using the latest technology.

Fireproofing shield and flame safety icon
Insulation board foam

Applications

Sikatherm® NFF can be used in a large variety of different applications, onsite and in industrialized production processes. These are just some examples below. Click on the application name to learn more.

Concrete block filled with mineral foam insulation material

Sikatherm® NFF, as a cement foam, is particularly suited for applications with concrete, offering:

  • Ultra-low densities possible (< 40 g/L)
  • Excellent thermal conductivity (33 mW/m*K at 50 g/L)
  • Superior adhesion
Insulated hollow clay block on workbench

Thanks to its unique pre-foaming technology, Sikatherm® NFF enables the use of insulating mineral foams in highly water-absorbing environments such as clay blocks.
It achieves:

  • Ultra-low densities (as low as 60 g/L)
  • Excellent thermal conductivity (34 mW/m*K at 60 g/L)
Suspended office ceiling with open light panel

Sikatherm® NFF can be easily cast in a continuous production process or in large molds. Boards of various thicknesses can be cut to size.

  • Compressive strength and thermal conductivity are dependent on the density.
  • Thermal conductivity of 35 mW/m*K at 70 g/L
Sikatherm NFF in prefabricated element sitting on wooden palette

Sikatherm® NFF can be applied in a fully automized process and it is designed for a wet-on-wet placement process. This results in a type of gradient concrete element which combines material homogeneity and efficient production process.

Insulation board foam

Foamed mortar stabilizes aluminum profiles in case of fire, providing insulation while remaining lightweight.

application of Sikatherm NFF in on site plaster

Pre-foamed Sikatherm® NFF shows good adhesion and is applicable vertically. It is therefore suitable as insulation render or onsite cavity filler.

application of Sikatherm NFF in flooring

Special Sikatherm® NFF products are designed for usage in flooring and roofing applications, combining fire protection, insulation and ease of application.

application of Sikatherm NFF in vertical insulation

The separation of hot and cold water pipes, as well as the insulation of chimneys or heating pipes, can be easily achieved using chemically-foamed cavity filling.

Sikatherm® NFF can be foamed vertically up to six meters without a variation in density.

application of Sikatherm NFF in refurbishment of double-layer brick wall air gap infill

Mechanically-foamed Sikatherm® NFF provides effective insulation for double-layer brick walls while allowing condensed water to be transported to the drying surface.

Energy Efficient

The Sikatherm® NFF product portfolio enables the use of recycled materials and production residues. It allows for a more resource-efficient production process, as energy-intensive autoclaving is not required. At the end of its life cycle, it can be handled in the same way as mortar or concrete waste material.

This groundbreaking production technology sets a new benchmark for innovation in the insulation industry, unlocking new business opportunities for our customers.

Performance Properties

Thermal conductivity strength development for Sikatherm® NFF

measured in accordance with DIN EN 12667 (Lambda), DIN EN 826 (compressive strength) and conditioned at 23°C and 50% RH

Thermal insulation weather protection icon graphic
Diagram showing the thermal conductivity and compressive strength performance of Sikatherm NFF in relation to the dry density

What Else Makes Sikatherm® NFF Unique

Sikatherm® NFF is a mortar specifically designed for low densities and outstanding insulating performance. Its fine pore system allows low thermal conductivity while offering a high heat storage capacity.

Thermal conductivity

Thermal insulation weather protection icon graphic

Lightweight

Lightweight icon with yellow feather graphic

Multifunctional

Illustrated multi functional pocket knife icon

Fire-resistant

Fireproofing shield and flame safety icon

Many benefits

  • Energy-saving production
  • Simple and flexible production
  • Resistant against freezing and thawing at all density classes
  • Condensing water will be transported to the surface due to capillary action
  • Foam volume remains constant at all moisture and temperature levels and will not change

And advantages for users

  • Non-combustible (A1)
  • Sandwich panels with NFF core classified as EI 90 fire-resistant according to EN 13501-2
  • Capillary effect allows self-drying
  • Very low thermal conductivity
  • High specific heat capacity (cooling effect)

Production Process

The foaming process of Sikatherm® NFF is straightforward, making it easy to handle with minimal effort for anyone experienced in mortar application.

Click play to see the production of Sika's non-flammable foam

Examples of Collaboration Projects

Filling of Concrete Blocks

  • Thermal conductivity λtreshold ≤ 33.3 mW/m*K (approved by DiBT)
  • Fully automated filling station
  • Chemically expanding foam 
  • Highest filling rates
  • Stable foam core, also in cut/sliced stones
  • Different cavity sizes in one production step are possible
  • A collaborative project with Meurin, Gertec and Saftig

Production of Insulation Boards

  • Thermal conductivity λdry = 35 mW/m*K at 70 g/L
  • Fully automated production
  • Chemically expanding foam
  • High fraction of recycled materials
  • For indoor and outdoor applications
  • A collaborative project with Swisspor and Eberhard
Insulation board foam

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