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Firestem™
Mortar is a fire rated load bearing system providing up to 4 hours fire protection
to compartment walls and floors around service penetrations.
When mixed with water it can be poured or trowelled into service penetration openings
preventing the passage of flame, smoke and toxic gases for periods of up to 4
hours. |
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Shutter
(plywood or dense mineral wool board).
Secondary reinforcement where necessary.
Thickness dependent upon fire resistance and load bearing capability. |
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Installation
Horizontal Seals (load bearing in concrete floors)
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Form
a temporary (or permanent) shutter to the underside of the floor |
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The
correct amount of Firestem™ Mortar is then mixed by hand or power
mixer and cast into the aperture |
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This
is them tamped down to consolidate to minimum thickness of (see FR required) deep,
also ensuring that there are no gaps left behind penetrations |
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note:
Any plastic pipes penetrating the seal should be fitted either with Firestem™
Fire Collar or Intumescent Pipe Wrap |
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On instruction, the wraps would be applied around each plastic pipe prior to the casting of the compound so that they would be embedded within the seal |
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Fire
Collars can be embedded or fixed externally when the compound has set |
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If
a temporary shuttering has been used, this is then removed |
Vertical
Seals
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Form
a temporary (or permanent) shutter to one face of the aperture |
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The
correct amount of Firestem™ Mortar is then mixed by hand or power
mixer |
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The remaining face of shuttering will be installed in stages. This will allow the compound to be poured or plastered into place and enable tamping/consolidation of the material |
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The
curing time of the compound may vary between 25 minutes to 1 hour depending on
the water content and ambient temperature |
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If
temporary shuttering has been used this is removed when compound is dry |
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note:
For plastic pipe penetrations, see horizontal seals |
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Technical
Specification
| Composition |
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a
blend of inorganic fillers |
| Appearance |
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white
powder, when mixed with water hardens to a solid compound |
| Shelf
Life |
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up
to 12 months if stored in unopened bags |
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Coverage
25Kg bag gives approx. 0.023m3. At 75mm thick 3.6 bags/m². At 100mm thick
4.8 bags/m² |
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Firestem™
Mortar systems is:
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Versatile |
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Quick
cure |
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Lightweight |
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Non
shrinking |
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High
structural and flexural strength |
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Advantages
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Gas
and smoke tight |
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Loadbearing |
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Fully
tested up to 4 hours and are tested to BS476 Part 20 |
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Suitable
for use in masonry walls and concrete floors |
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Quick
dry for ease of installation |
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Certification
The Firestem™ Mortar system has been tested by Warrington Fire Research
Consultants according to BS476 part 20 and has been fully assessed for its structural
and flexural capability.
Fire rating to BS476 part 20:
Rating
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Recommended
Thickness |
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50mm |
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50mm |
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75mm |
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100mm |
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