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.

Specification:

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