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Joint Filler for Knauf Safeboard X-Ray Resistant Plasterboard

Joint Filler for Knauf Safeboard X-Ray Resistant Plasterboard
Joint Filler for Knauf Safeboard X-Ray Resistant Plasterboard
Joint Filler for Knauf Safeboard X-Ray Resistant Plasterboard
Joint Filler for Knauf Safeboard X-Ray Resistant Plasterboard
Joint Filler for Knauf Safeboard X-Ray Resistant Plasterboard
  • Knauf Safeboard Joint Filler 5kg (Jointing Compound)
  • Designed for use with Knauf Safeboard X-ray shielding plasterboard
  • Easy to apply jointing product whether by hand or machine application
  • Joint Filler contains barium sulphate to provide radiation protection
  • Estimating guide is a 10m2 coverage per 5kg tub of the product
Estimated delivery:
In Stock
£ 85.06
Ex VAT: £ 70.88
  • Brand: Knauf®
  • Model: Safeboard Joint Filler
  • Weight: 5.00kg
  • Dimensions: 200mm x 150mm x 75mm
  • SKU: Joint Filler 5kg
  • Product code: P1-2514
  • MPN: Safeboard Joint Filler

Options available

Knauf Safeboard Joint Filler 5kg (Jointing Compound) is a joint filler designed for use with Knauf Safeboard X-ray shielding plasterboards, an easy to apply jointing product whether by hand or machine application.

Safeboard Joint Filler is an odourless dry powder, yellowish in appearance based on calcium carbonate with additions of mica, silica and vinyl polymers, and small amounts of water retention and workability aids. 

Knauf Joint Filler is an ideal solution recommended for installation of Knauf Safeboard® x-ray resistant plasterboard that will give you the smoothest finish with the minimum effort.

Safeboard Joint Filler contains barium sulphate to provide radiation protection during installation of 12.5mm Knauf Safeboard Plasterboards.

This jointing compound should be used for filling the joints between Knauf Safeboard and covering screw heads.

Safeboard Joint Filler comes as a powder in 5kg tubes and should be mixed with the water before use.

Estimating guide is a 10m2 coverage per 5kg tub of the product.




Material: Jointing Compound

Consistency: Powder

Colour: Yellowish

Weight: 5kg

Coverage: 10m2

Profile: Joint Filler

Reaction to fire: National Classification - Limited combustibility

Fire Classification: European Classification is rated as A2


Knauf Safeboard X-Ray Resistant Plasterboard Installation:

 · With Barium Sulphate in its core, in many cases Knauf Safeboard removes the need for lead altogether.

 · Ideal for all applications within the healthcare sector where X-ray shielding is required. 

 · This board can speed up the process of design and installation as fewer components are needed to complete the shielding.

 · Joints must be finished with Knauf Safeboard Joint Filler.

 · Every layer of Safeboard (board joints and screw heads) must be jointed, ensuring joints are staggered.

 · Safeboard can be recycled with other gypsum products.

 · Joint tape is not required.


Safeboard X-Ray Resistant Plasterboard Knauf Frequently Asked Questions (FAQs):


 · How to specify Knauf Safeboard X-Ray Resistant Plasterboard?

 · How many Safeboard layers?

Understandably, shielding X-rays requires special consideration, please ensure that where necessary you engage a Radiation Protection Advisor.

If it’s a larger project, it’s likely it will require an accompanying Radiation Protection Report that gives a “lead code”, which relates to the thickness of lead required.

Where Knauf Safeboard differs to lead is that there are differing requirements based on the output of the X-ray source (measured in kV).

You might need just a little as one layer of Safeboard or that many as 6 layers to achieve code 7 for example.


 · What is the weight of the board?

25.5kg per 2400mm x 625mm x 12.5mm sheet (17kg per m²).


 · What is the colour of the board?

Grey paper facings with a yellowish gypsum core.


 · What fire rating does the board give? 

Fire resistance performance is tested using the complete Knauf system such as a partition wall, ceiling or floor, and it is the complete Knauf system that will achieve a fire rating.

This means the board alone cannot be given a fire rating.

Gypsum is classified as a non-combustible material.


 · What acoustic performance does the board give?

Safeboards has been acoustically tested on a full Knauf system; it is the system that will achieve an acoustic rating.


 · What edge profiles are available?

Unlike most of our boards, this has a rounded tapered edge.

Use Knauf Joint Filler to fill the joints.


 · What is the acceptable moisture content?

If the board has been exposed or semi-exposed for a brief period, it is common for those inspecting it to use a damp proof meter such as a Protimeter.

It is recommended as a rule of thumb that the board should be suspected of lasting damage if the reading exceeds 16-18.

Below 16 is acceptable.


 · What is the maximum temperature that the board can withstand?

Safeboard can withstand 50°C.


 · What are the manufacturing board size tolerances?

In accordance to EN 520:2004 Knauf manufacturers its board to the below tolerances: Width +0/-4mm, Length +0/-5mm, Thickness +0/-5mm.


 · What is the maximum finish weight that can be applied to the board?

The maximum finish weight that can be applied to the board is 32kg per m².


 · Is the safeboard lead lined?

Knauf Safeboard is not lead lined plasterboard.

Safeboard has Barium Sulphate in its core.


 · What do I use to joint this product?

You should use Knauf Safeboard Joint Filler.

You need to joint every layer of Safeboard (board joints and screws heads), ensuring joints are staggered.

You do not need to tape the joints.


*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 10.00 m2
Colour Yellowish
Consistancy Powder
Material Gypsum and Barium Sulphate
Profile Jointing Compound
Reaction to fire National Classification - Limited combustibility
Weight 5.00kg
Shelf Life max. 6 months
Fire Classification European Classification is rated as A2
Coverage 10.00m2
Finish Smooth
Applications Dental Surgery, Implant Centre, Veterinary Practice, Hospitals
Service Temperature from +5 °C to +25 °C
Decoration Plaster Finish ǀ Direct Decoration
Features Radiation (X-Rays) Protection and Smoothest Finish
Manufacturer Knauf Safeboard®

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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.
Joint Filler for Knauf Safeboard X-Ray Resistant Plasterboard
Joint Filler for Knauf Safeboard X-Ray Resistant Plasterboard
£ 85.06