Envirograf Multi Purpose Box
  • Envirograf Multi Purpose Box

Envirograf Multi Purpose Box

Product 16

A versatile Multi Purpose Box sealing existing services that pass through a fire wall or barrier, filled with intumescent material & fire-resistant sponge smoke seal.

  • Use on walls, floors and ceilings
  • Detachable top for fitting around existing surfaces
  • Up to 4 hours fire protection
  • Can be surface-mounted or recessed
  • Adjustable fixing brackets for corners and tight spaces
  • Box sizes below

VAT excluded

£10.14 Tax incl.


Box sizes

Ref Depth Internal (box) External (box)
EB45/50 50mm 45mm 67mm
EB55/50 50mm 55mm 76mm
EB72/50 50mm 72mm 93mm
EB83/50 50mm 83mm 105mm
EB115/50 50mm 115mm 138mm
EB135/50 50mm 135mm 158mm
EB166/50 50mm 166mm 196mm
EB166/100 100mm 166mm 196mm
EB215/50 50mm 215mm 255mm
EB215/100 100mm 215mm 255mm
EB265/100 100mm 265mm 315mm
EB315/100 100mm 315mm 365mm

The Envirograf Multi Purpose Box is ideal for fitting around existing services such as pipes, wires and cables that pass through a fire barrier. One end removes so that the unit can slide into place, making it perfect for tight spaces, angles and corners.

Fixing brackets are adjustable, able to be bent flat for screwing into place flush with a wall, ceiling or conventional right angle. Fit the box to walls and ceilings, or use recessed in a partitioned wall, allowing the flanges to sit flush against the surface in the cavity.

The box is lined with intumescent material that expands in a fire to seal off the gap between services, and each unit is supplied with fire-resistant smoke seal sponge that can be cut to fit around pipes and wires.


For standard open areas, simply place the box over the services, use the smoke seal if required, and screw into position. If the services are already in place, remove the detachable section, fix the ‘U’ section first then slide back the detachable section and fix the smoke seal if required. When the unit is flush against a ceiling, floor, wall, or corner simply bend the fixing brackets flat and screw into position. When using multi-purpose box to fit around existing services in a tight corner, simply remove the detachable section and fix the ‘U’ section into position. Fixing brackets can be bent flat if required. Replace the detachable section and fix to finish. Insert the smoke seal if required.

Material Specification:

The fire proof sponge is a black flexible polyurethane sponge treated with flame retardants, Particulate filler and a polymeric bonding agent.

Multigraf Intumescent material chemical constitution

  • Mineral Wool Fibre 20-70% by weight
  • Exfoliating Graphite 20-60% by weight
  • Organic Binder (including adhesive coating) 5.0-30% by weight

Test Details:

Test Integrity Insulation
LPC - TE 89597 197 Minutes 177 Minutes
Trada - FR 1746 152 Minutes 133 Minutes

IMPORTANT FIRE PRODUCTS NOTICE: The information displayed on this website should be used as a guide ONLY and our Technical Department should be contacted to obtain a tailored specification and any advice necessary before you place an order for fire protection products. Fire protection products are non-returnable except in accordance with Condition 8 of the Terms and ConditionsWe will not be held liable for any resulting damage to property, human life or monetary costs incurred due to the incorrect specification you have prepared or use of fire protection products caused by your negligence, including your failure to have contacted us to obtain the relevant advice/specification.

Any Envirograf products to be used in or for Harrods department store should be authorised with our Technical Team prior to purchase.

Product Details
Product 16

Customer agrees that before placing an Order, Customer has read and understood the most up to date Product Data Sheet for the Product. Where we have access to the Product Data Sheet from the manufacturer, we will either provide a copy on request, or include a link to the Product Data Sheet available on the manufacturer’s website. Customer further agrees that we have no liability for any errors or omissions contained within the Product Data Sheets. For more information, please see our Terms & Conditions of Sale.

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