Pyromas A intumescent sealant combining water-based acrylic emulsion with fillers to provide high levels of fire resistance in a range of building applications.

The one-part sealant is solvent free and when subjected to fire, a chemical reaction forms a safe, inorganic meringue, which provides proven fire sealing in building joints incorporating concrete, wood and metal.

• Effective, slump-free sealing in joints up to 35mm wide
• Proven 4-hour fire resistance
• Can also provide 52dB acoustic rating
• Permanent sealing for all low-movement joints, dry lining and partitions
• Easily smoothed to a good surface finish
• Available in white, brown and grey
• Can be painted after curing
• Supplied in 310ml cartridges to fit standard mastic guns or 600ml sausages

Description

Pyromas A is a one part sealant system which is solvent free. When subjected to fire, a chemical reaction forms a safe, inorganic meringue. 

The intumesced product provides fire sealing in building joints up to 35mm wide.

Performance

Fire resistance tests have been conducted to BS476: Part 20: 1987 achieving 4 hours fire resistance in gaps up to 35mm wide. Tests were conducted between a number of substrates including Hardwood, Softwood, Steel, Concrete, Vermiculite Board and Aerated Concrete. Pyromas A shows good resistance to a wide range of commonly found chemicals. Care must be taken to avoid prolonged contact with hydrocarbon based products.

Applications

Pyromas A is suitable as a permanent fire seal in low movement joints, door frame to wall gaps, dry lining and partitions.

Construction

Joints in structures should be dry, clean, and free of powder or dust.

Pyromas A should be inserted to the correct depth to ensure the necessary fire performance.
To improve surface finish, smooth with a spatula. Cured Sealant can be over-painted.

Packaging

Pyromas A is supplied in 310ml cartridges to fit standard skeleton mastic guns. Also supplied as 600ml sausages. Box quantities are 25 per box.

Physical Data

Colours: White (Grey and Brown available on request)

Storage Temp: +5° to +25°C

Reaction Temp: 120°C

Application Temp: +5° to +30°C

Volume Expansion: 150%

Tack Free Time: 10-60 minutes (depending on conditions)

Shelf life: 12 months

Joint movement: +/- 10%

Estimating Quantities for Pyromas A

To calculate the required number of cartridges required to fill a gap use the following equation:

W x D x L = N

N÷310= Number of Cartridges

W=Width of gap in mm.  D=Depth of gap in mm.  

L=Length of gap in mtrs.  N=Volume of material.

Product Data Sheet
Pyromas A Data Sheet

The above information is based on current test data, health and safety information and application instructions supplied by our suppliers and manufacturers of the products. It is supplied for guidance and to the best of our knowledge is true and accurate. Customers should satisfy themselves to the suitability of the products in its intended use and no guarantee is given or implied as the conditions of actual use are beyond our control. If in doubt the customer should consult the designer of the project or the local building control. 

Fire Stopping Shop, disclaim any liability for loss, damage or other expense which may arise from the use of this information, data or products refereed to and reserve the right to amend or change any details without notice. This statement does not affect your statuary rights.