METRO SUPPLY COMPANY - "A Supplier of Mechanical and Acoustical Insulation Products"

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Metacaulk Firestopping Products

MetaCaulk Fire Rated Putty Pads used to block smoke and sound through electrical recepticals and light switch boxes.


RectorSeal MetaCaulk Putty Pads are used to seal and maintain the hourly rating of fire rated walls and ceilings containing electrical outlet boxes. MetaCaulk putty pads are also used to limit sound transmission through openings in STC rated walls/ceilings. Unlike other brands' products, only one MetaCaulk Putty Pad is required to maintain a 1-2 hour fire rating code. No additional putty material is needed to plug the end of each electrical metallic tube or conduit at its connection to the box. MetaCaulk Putty Pads are hand moldable with no curing time required. Putty Pads have a STC rating 60, Tested in a UL 411 wall assembly/section to ASTM E90.


(Step 1). Remove plastic liner from one side of pad. Align pad with the side of the box partially overlapping the stud and adhere.  Work pad to the opposite side of the box and over the edges

(Step 2). If wall membrane is in place, pack putty into gaps between box and gypsum board slightly overlapping inner wallboard surface. If membrane is to be installed after pad installation, overlap front edge of box so that putty will be compressed around edges of box as wallboard is installed.  Cut slits in pad to fit around conduit or cables

(Step 3). Press pad to surface of top, bottom, and sides of box

(Step 4). Trim excess at corners and apply to conduit fittings connected to the box. Remove exposed liner. Optionally, putty may be packed into inside of conduit fittings to prevent passage of smoke. Only one putty pad thickness (1/8") is needed for a 1 or 2 hour rating.

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RectorSeal Metacaulk Pass-Thru Device


RectorSeal Metacaulk Pass-Thru Device’s pre-firestopped design allows electrical data or communication cable or pipes to penetrate fire-rated walls and floors. Square or round shaped steel sleeves with intumescent material. Opens for easy installation, retrofit or removal of cables. Industry leading “L” rating.


Metacaulk Pass-Thru Devices are used to seal cables or pipes that penetrate thru 1 and 2 hour fire-rated walls and floors. Suitable for most types of construction including concrete floors, concrete walls, concrete block walls and gypsum drywall, and rated wooden floors. Individual devices can be assembled together to form double, triples and sixplex units using mounting brackets (purchased separately). Ideal for use in data, communications and electrical supply cables.

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Rectorseal Metacaulk Intumescent Sleeve


Rectorseal Metacaulk Intumescent Sleeve is a firestop seal for PVC, cc-PVC, CPVC, FRPP, PP and ABS pipe and rigid non-metallic conduit installations. Easily installed without modifications, steel bolts or fasteners, the Intumescent Sleeve is an ideal approach for firestopping combustible pipes penetrating the uneven contours of a concrete fluted deck assembly.


Metacaulk Intumescent Sleeves will firestop both sides of wall when installed from either side and provides a cost-effective alternative to collars for pipes going through walls and floors. The Sleeve can also be used in applications that require retrofit.

The Intumescent Sleeve can be used with PVC, cc-PVC, CPVC, FRPP, PP, ABS and PVDF pipe and rigid, nonmetallic conduits in sizes ranging from 2 in to 8 in.  The Sleeve has been tested for use in concrete floor/ wall installations and concrete fluted deck assembly. For application with 8 in. diameter or smaller PVC and CPVC, the sleeve has been approved with an optional sleeve (S/10 or heavier) cast or grouted into the floor or wall.

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Metacaulk Cover Guard


Metacaulk Cover Guard is a single component, fire-rated gasket for use with electrical boxes to comply with the “24 inch rule”.

Metacaulk Cover Guard fits under the cover plate and does not take up volume in the electrical box. It is a labor saving replacement for putty pads in normal applications. STC 53 rating, Tested in a UL 411 wall assembly/section to ASTM E90.

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Metacaulk Box Guard


Metacaulk Box Guard is a highly intumescent, fire-rated pad for use in electrical boxes. When complying with the “24 inch rule”, it is inserted on the inside back wall of an electrical box.

When exposed to fire, Box Guard will expand forming a char that will seal off the opening and prevent the spread of flames and limit the temperature rise on the unexposed surfaces. A labor saving, economical alternative to putty pads. Great for retrofit jobs. STC 55 Rating, Tested in a UL 411 wall assembly/section to ASTM E90.

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Rectorseal Metacaulk Firestop Pillows


Rectorseal Metacaulk Firestop Pillows are intumescent and designed for use primarily in large temporary or frequently accessed openings with cables, cable trays, blank openings or multiple penetrating items.

In the event of a fire, Metacaulk Firestop Pillows will prevent the spread of flames and hot gases through the openings.

Since no cure time is required, RectorSeal Firestop Pillows are ready to install.  RectorSeal® Firestop Pillows are reusable since they can be removed and reinstalled if necessary.

Use RectorSeal Firestop Pillows for various applications:

  • Blank Openings
  • Cable Tray Openings
  • Multiple Penetration Openings
  • Telecommunication Wires
  • Computer Lines
  • Retrofit/Re-enter Openings
  • Temporary Installations
  • Large Openings

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Metacaulk Composite Sheet


Metacaulk Composite Sheet is a rigid, fire resistive panel used to seal penetrations and restore the fire-rating to floors, ceilings or walls in which a large opening has been made for the passage of penetrating items.

It is made of a reinforced, highly intumescent material which is bonded on one side to a galvanized steel sheet.


Metacaulk Composite Sheet is used to seal penetrations through fire-rated walls and floors and for cable trays, cable, piping and large blanks. It provides a fire resistive smoke seal for any shape opening in concrete block or slabs or gypsum walls for up to 4 hours - UL Classified.

Use Metacaulk Composite Sheet to shield cable trays, conduit, panels, valves and vital heat-sensitive process equipment. The product is effective in protecting cable dropouts, junction boxes and cabinets, as well as providing an intermediate firestop in horizonal and vertical cable tray runs.

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FlameSafe Bags


FlameSafe Bags are a unique firestop product allowing easy access to cables, cable trays, and metallic pipes for through-penetrations in fire-rated floors and walls.

FlameSafe Bags are patented bags consisting of tightly woven, durable, coated cloth, filled with a combination of mineral fibers, incombustible components, intumescent agents and special fire-retardant additives. They are resistive to the environment and retain their properties and effectiveness when subjected to weather, temperature and atmospheric conditions.

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