What is intumescent mastic?
Our Intumescent Mastic is a one part intumescent acrylic mastic for sealing gaps around fire doors, window frames and for sealing joints, voids and irregular holes in fire rated structures. The sealant forms a char, preventing the passage of fire and smoke, when exposed to the heat of a fire.
What is intumescent sealant used for?
Intumescent sealant seals and fireproofs gaps around and between cables. Fire doors: sealing fire doors with an intumescent product helps keep the evacuation routes open for longer as well as preventing the fire from spreading past the doors.
How does intumescent sealant work?
An intumescent seal is a strip of material fitted around a doorway, that when exposed to heat, expands closing any gaps around the door to stop the fire spreading for a period of time. These seals usually come with either 30 or 60 minute ratings.
Is mastic fire resistant?
A range of specialist fire protection mastic sealants, from well-known and trusted brands like Dow Corning Geocel, Otto-Chemie, Sika Everbuild, and Polyseam Protecta. All these firestopping and fire protection products are fully certified by the appropriate governing bodies and approved for professional use.
Does intumescent mastic expand?
Fire stopping of combustible services is ensured once the sealant reaches temperatures of 135°C and above, where it will expand and close any voids formed, to stop the passage of smoke and fire. …
Can you paint over intumescent sealant?
Intumescent seal manufacturers do not recommend the painting over of intumescent strips (seals) but there is not enough evidence to show that the painting of intumescent strips has any detrimental effect on their performance.
What is acoustic intumescent sealant?
Acoustic Intumescent Sealant seals joints and service penetrations within walls, partitions, fire rated door frames and glazing systems. It can also be used to seal joints within party walls to provide an acoustic seal.
What is intumescent foam?
In simple terms, an intumescent material swells with exposure to heat. This swelling increases the volume of the material and produces a char which is a poor conductor of heat. The combination of swelling and the associated reduced heat transfer blocks fire, smoke and hot gasses.
Is silicone an intumescent?
Fire resistance up to 240 minutes. Pyroplex Fire Rated Silicone Sealant is fire rated – it is not intumescent.
What means intumescent?
An intumescent is a substance that swells as a result of heat exposure, thus increasing in volume and decreasing in density. Intumescent materials used in fire protection will increase their volume significantly under the influence of heat (approximately at 200°C).
Is silicone sealant fire resistant?
Silicone is both heat and flame resistant. Thanks to the unusual chemical properties of silicone as plastic – it doesn’t catch fire very easily and it doesn’t act as a conductor of heat, which means that it is fairly fire-resistant.
Where to use intumescent acrylic and acoustic mastic sealant?
Intumescent acrylic and acoustic mastic is a powerful, fire resistant filler and sealant. Provides a permanent flexible seal against fire, smoke and toxic fumes. Ideal for use either horizontally or vertically around door frames, cable trays, ducting and partitions.
What kind of sealant is Astro Intu mastic?
Astro Intu Mastic is a water based acrylic sealant used to reinstate the fire resistance of wall and floor constructions in linear joints and where apertures are penetrated by multiple services.
What does Rockwool acoustic intumescent sealant do?
As part of ROCKWOOL’s FIREPRO® range of fire protection products, the Acoustic Intumescent Sealant has been designed to seal joints and service gaps in compartment walls and penetration seals, ensuring your property is adequately protected.
Why is intumescent sealant used in building construction?
Fire safety is one of the main concerns when it comes to constructing buildings and other structures. Therefore, many international and national standards are used to assure fire safety of products, such as intumescent sealant, and eventually entire constructions.