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50mm PROMASIL-1000L Fire Rated Insulation Board (1000°C)

50mm PROMASIL-1000L Fire Rated Insulation Board (1000°C)
50mm PROMASIL-1000L Fire Rated Insulation Board (1000°C)
50mm PROMASIL-1000L Fire Rated Insulation Board (1000°C)
50mm PROMASIL-1000L Fire Rated Insulation Board (1000°C)
50mm PROMASIL-1000L Fire Rated Insulation Board (1000°C)
50mm PROMASIL-1000L Fire Rated Insulation Board (1000°C)
50mm PROMASIL-1000L Fire Rated Insulation Board (1000°C)
  • 50mm Promat PROMASIL-1000L Calcium Silicate Insulation Board
  • Very good thermal properties and thermal stability up to 1000°C
  • Used in the fireplaces, wood burning stoves, PROMAFOUR® systems
  • Non-combustible calcium silicate hydrate, cellulose fire insulation board
  • Mechanically strong · Vibration proof · Lightweight but strong
Estimated delivery:
In Stock
£ 724.88
Ex VAT: £ 604.07
  • Brand: Promat®
  • Model: 50mm PROMASIL-1000L
  • Weight: 94.00kg
  • Dimensions: 2,500mm x 1,200mm x 50mm
  • SKU: 50mm PROMASIL-1000L
  • Product code: P1-2606
  • MPN: 50mm PROMASIL-1000L

Options available

PROMASIL-1000L 50mm Fire Rated Insulation Board Promat is a mechanically strong and vibration proof fire insulation board with very good thermal properties and thermal stability up to 1000°C, used in the fireplace systems.

Promat PROMASIL-1000L Boards are often used in heavy industry for anode baking furnaces and electrolysis cells, smelting and heat treatment furnaces, melting furnaces, heat treatment, foming furnaces, heat exchangers and cyclone separators.

50mm Promasil 1000L is a stable mineral matrix structure fire insulation board used in various industrial applications as thermal back-up insulation in a refractory lining.

Promat Promasil 1000L is a non-combustible calcium silicate hydrate, cellulose fibre, glass fibre, quartz and mineral filler based fire insulation board.

This board can be used in the PROMAFOUR® fireplace system for the construction of false chimney breast or cassette inset type fireplaces.

PROMASIL® range of products can be easily worked and machined with woodworking tools (dust extraction is recommended).

When cutting to size, the maximum workplace concentration values for inhalable dust must be observed.

Fire Thermal Insulation Promasil 1000L Boards are available in standard size 2500mm long by 1200mm wide.




Thickness: 50mm

Width: 1200mm

Length: 2500mm

Board Coverage: 3.00m2

Thermal Conductivity: 0.163 W/mK (at 800ºC)

Colour: white/grey

Density: 300kg/m³

Classification temperature: 1000ºC

Fire Rating: A1 Non-combustible

Fire Protection: 60 minutes

Reaction to Fire: Class 1 (Surface Spread of Flame)

Resistance to Fire: Class 0 (Building Regulations)


Promat PROMASIL-1000L Features:

 · Mechanically strong.

 · Vibration proof.

 · Low thermal conductivity.

 · For Various industrial applications.

 · A1 Non Combustible to EN13501-1.

 · Fire insulation board.

 · Suitable for fireplaces.

 · Low bulk density and shrinkage.

 · Used in PROMAFOUR® fire systems.

 · Lightweight but strong.

 · Good mechanical strength.

 · Thermal stability up to 1000°C.

 · Suitable for wood burning stoves.

 · Good workability.


*Further information may be found in our Downloads section.

Fairly easy access to all PDF files.

Datasheet ǀ Declaration of Performance - DoP ǀ BBA Certificate ǀ Installation Guide ǀ Certificates ǀ Brochure ǀ SPEC Sheet

Board covarage 3.00 m2
Colour White | Grey
Density 300kg/m3
Length 2500mm
Material Fire Protective Board
Profile Square Edge
Size 50mm x 1200mm x 2500mm
Temperature resistance 1000ºC
Thermal Conductivity 0.163W/mK (at 800 ºC)
Thickness 50mm
Water Vapour Resistivity 20μ
Weight/m2 31.34kg
Width 1200mm
Fire Classification 1000ºC
Building Regulations Class ‘0’ to UK Building Regulations
Fire performance 60 minutes (A1)
Finish Smooth face
Application Temperature from +5 °C to +25 °C
Shipping method Articulated Vehicle ǀ Courier
Applications Fireplaces | Wood Burning Stoves | PROMAFOUR® system
Features Calcium Silicate Fire Insulating Board
Manufacturer Promat PROMASIL®-1000L

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We deliver insulation materials to Mainland UK only. Deliveries to Highlands, Northern Ireland, Isle of Wight etc.. might be possible at additional cost.
We offer free delivery on most of the orders above £300 (excluding VAT) (except special products - shipping cost via courier - products marked ''Request A Quote'')

Delivery of some insulation materials might be extended due to the current situation (Covid-19, stock shortages, allocations).
If you need materials quickly please contact us - we will do our best to help you source materials needed.

We do not deliver on weekends and bank holidays. Sometimes we can deliver on Saturdays - please check with us before placing the order.
If you need any further information please contact us tel. 02081910776

We can help to calculate price per m2 or linear meter (one meter in length) cost, please just contact us via phone 02081910776, email or live chat. Alternatively, you can work it out yourself quickly and easily: to get cost per meter square please divide price shown in orange area by ''Required area (m2)'' Example price of £28.80 divided by board coverage 2.88m2 = cost of £10.00 per m2.


No matter whether you choose a local installer or a national company, there’s a few tips to help you find the right installer for your home insulation improvements, such as asking for recommendations and making sure that they’re part of a certification scheme. This makes sure that they have the right skills and standards of workmanship to carry out the installation, and you can be sure that they know exactly what they are doing.


1. Thermal inspection picture in portfolio

It’s worth seeing a installer’s previous work. There’s no harm asking if you can see any properties nearby that they’ve installed insulation in. Best way would be to see Infrared Thermal Imaging Inspections. Thermal cameras spot small, but key changes in temperature in different areas of a house, identifying problematic areas that the human eye never could and some that a visual inspection could only hypothesize.

2. Reviews

Along with checking recommendations and previous work, finding reviews online can often be a great way to find out if they provide a good service or not. However, it’s best not to solely rely on reviews you may find or review websites, as there’s no controlling who writes them.

3. Compare prices

Comparing prices will also ensure companies can’t take advantage of you and give you a fair price. 

4. Word of Mouth

The best way to find a great insulation installer is through recommendations. Make sure you ask friends and family. They will most likely give you their honest opinion and can tell you from first hand experience.


Whether you require a wall, cladding, external wall, loft or floor insulation fitted, you can find and hire your local insulation installers from popular UK web pages. A simple internet search will return thousands of potential installers near your area.



We are the stockist of construction materials and related products for both trade and DIY from most recognizable brands in the UK like Cordek, RCM, Promat, Rockwool, Isover, Celotex, Xtratherm, Ursa, Low-E, Cedral, Kingspan, Dufaylite, British Gypsum, K-rend, Ecotherm, Iko enertherm, Kay-Metzeler, Terrawool to allow you to complete your insulation job on time at competitive prices and the highest standards.


Whether you are a large company or a DIYer, if you need a large amount of insulation materials, we can offer quantity discounts at the best prices. Please contact us and our friendly customer service will try to find the best and cheapest solutions for you. We value your time and we will try to deliver the products as soon as possible at a reasonable price to your construction site or house. The UK's leading insulation supplier near you and your needs. Price List available upon request.
50mm PROMASIL-1000L Fire Rated Insulation Board (1000°C)
50mm PROMASIL-1000L Fire Rated Insulation Board (1000°C)
£ 724.88