About the

Bloktherm System

Bloktherm is a new-generation thermal insulation system based on advanced ceramic microsphere technology, developed to meet the challenges of modern construction, renovation and energy efficiency. Unlike traditional insulation materials that work through bulk and absorption, Bloktherm reflects thermal radiation – creating a powerful barrier against heat loss and moisture, all in just 1–3mm of coating.

How It Works

At the heart of Bloktherm lies a water-based dispersion of ceramic microspheres. These microspheres are hollow, highly resistant to heat, and distributed evenly in a flexible acrylic base. When applied to a surface, they form a thin, breathable film that:

  • Reflects heat radiation back into the room (or outwards in summer)
  • Minimises thermal bridging
  • Prevents condensation
  • Resists mould and microbial growth
  • Reduces surface temperature fluctuations

This reflective insulation mechanism allows Bloktherm to perform exceptionally well on surfaces where traditional materials are either impractical or impossible to install.

UK Climate-Ready

Bloktherm improves thermal efficiency and protects against condensation, thermal bridges,
and mould – common issues in British buildings.

Bloktherm is particularly well suited for UK properties, where condensation, cold walls and inefficient heating are common. Whether you’re insulating a Victorian terrace, a modern flat or a commercial unit, Bloktherm offers a smart, space-saving solution

Why Choose Bloktherm?

  • Ultra-thin – 1–3mm replaces up to 10cm of foam insulation
  • Reflective – works through radiant heat reflection, not absorption
  • Breathable – prevents trapped moisture and mould growth
  • Safe & non-toxic – water-based, solvent-free, odourless
  • Fire-resistant – certified Class B-s1,d0
  • Easy to apply – like paint, with roller, brush or spray
  • Adheres to multiple surfaces – brick, plaster, wood, concrete, glass, metal

Eco-Friendly. Energy-Saving. Effortless.

Tested and Certified

Bloktherm has undergone extensive laboratory and real-world testing across Europe. It meets EU standards for thermal insulation, vapour permeability, fire resistance, durability and ecological safety. The technology has been trusted in thousands of projects – now available in the UK through TopThermltd.

Where Bloktherm
Works Best

Versatile. Reliable.
Ready for any surface.

Bloktherm adapts to a wide range of applications – from everyday home improvements to demanding commercial and industrial projects. Its thin, flexible coating bonds easily with many materials and surfaces, offering insulation and moisture protection exactly where you need it.

  • Interior & exterior walls
  • Ceilings and roofs
  • Metal, glass, wood, concrete
  • Pipes, radiators, tanks
  • Residential, commercial & industrial buildings

Get in touch today

Do you have any questions?

“Outstanding Work”

I applied Bloktherm to the exterior walls of my house last autumn, and it’s made a huge difference. The walls used to feel cold and we had issues with damp patches during winter – now everything stays dry and the house holds heat much better. The coating went on easily and looks great too. TopThermltd were really helpful throughout the process.

Mark S. – Bristol