MONOKOTE® Z-156

Ultra high density, cementitious fireproofing

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Product Description

MONOKOTE® Z-156 ultra high density cementitious fireproofing has been developed by GCP Applied Technologies to meet specialty, commercial and industrial fireproofing requirements.

Monokote Z-156 is a Portland cement-based, factory-mixed material requiring only the addition of water on the job site for application. It is spray applied directly to structural steel (beams and columns), providing up to 4 hours of fire resistance. Its physical characteristics are excellent for areas exposed to environmental or climatic conditions.

Monokote Z-156 may be used in areas where superior durability is required such as parking garages. This product is ideal for use in clean room environments where issues such as particle emissions and off gassing are critical to the interior environment within the building.

Features & Benefits

Monokote Z-156 offers the following advantages to architects, engineers, and applicators:

  • Factory pre-mixed - Ready to use. No job site proportioning required. Simply add water in a standard paddle-type plaster mixer and apply with conventional plastering equipment.
  • Non-toxic - The factory-mixed blend of common Portland cement and other inert materials requires only the addition of water for mixing and application.
  • Attractive finishes - Monokote Z-156 may be sprayed or hand troweled after spraying to achieve a lightly textured appearance.
  • Equipment versatility - Monokote Z-156 can be mixed in standard plaster mixers. After mixing, Monokote Z-156 may be spray-applied with commonly available pumping and spraying equipment.
  • Moisture resistant - The Portland cement base affords excellent fire protection characteristics in areas subjected to high humidity.
  • Durable - Hardness and maximum durability help resist accidental physical damage even in the toughest exposures.
  • Weatherable - Able to withstand freeze/thaw, wind, rain and other climatic conditions.

Uses

Monokote Z-156 may be used in parking garages, exterior areas, mechanical rooms and other areas where a superior durable product is required.

Delivery & Storage

All material to be used for fireproofing should be delivered in original unopened packages bearing the name of the manufacturer, the brand and proper Underwriters Laboratories Inc. labels for fire hazard and fire resistance classifications.

The material should be kept dry until ready for use. Keep packages of material off of the ground, under cover and away from sweating walls and other damp surfaces. All bags that have been exposed to water before use should be discarded. Stock of material is to be rotated and used before its expiration date.

Steel & Concrete Surfaces

Prior to the application of Monokote Z-156, an inspection should be made to determine that all steel surfaces are acceptable to receive fireproofing. The steel to be fireproofed should be free of oil, grease, excess rolling compounds or lubricants, loose mill scale, excess rust, noncompatible primer, lock down agent or any other substance that will impair proper adhesion. Where necessary, the cleaning of steel surfaces to receive fireproofing will be the responsibility of the general contractor.

Prior to application of Monokote Z-156, a bonding agent, approved by the fireproofing manufacturer, should be applied to all concrete substrates to receive Monokote Z-156.

The project architect will determine if the painted/primed steel to receive fireproofing has been tested in accordance with ASTM E119, to provide the required fire resistance rating.

Temperature

An air and substrate temperature of 40 °F (4.5 °C) minimum should be maintained for 24 hours prior to application, during application and for a minimum of 72 hours after application of Monokote Z-156.

Application

  • Monokote Z-156 material should not be used if it contains partially set, frozen or caked material.
  • Monokote Z-156 should have a minimum average dry, in-place density of 50 lbs/ft3 (800 kg/m3).
  • Monokote Z-156 is formulated to be mixed with water at the job site.
  • Monokote Z-156 is applied directly to the steel, at various rates of application which will be job dependent, using standard plastering type equipment or continuous mixer/pump units. A spray gun, with a properly sized orifice and spray shield and air pressure at the nozzle of approximately 20 psi (0.138 MPa), will provide the correct hangability, density and appearance.

Note: If freshly sprayed Monokote Z-156 does not adhere properly, it is most likely due to a too wet mix, poor thickness control, or an improperly cleaned substrate.

Mixing

  • Monokote Z-156 should be mixed by machine in a conventional, plaster-type mixer or a continuous mixer specifically modified for cementitious fireproofing. The mixer should be kept clean and free of all previously mixed material. Adjust the mixer speed in a conventional mixer to the lowest speed which gives adequate blending of the material and a mixer density of 65 to 70 pcf (1040 to 1120 kg/m3) of material.

  • Using a suitable metering device and a conventional mixer, add approximately 3 gallons of water per bag to the mixer as the blades turn. Mixing should continue until the mix is lump-free, with a creamy texture. All material is to be thoroughly wet. Over mixing Monokote Z-156 will reduce pumping rate and will negatively affect in-place density and mechanical properties.

Field Tests

The architect will select an independent testing laboratory (for which the owner will pay) to sample and verify the thickness and density of the fireproofing in accordance with the provisions of ASTM E605-77, Standard Test Method for Thickness and Density of Sprayed Fire-Resistive Material Applied to Structural Members or Uniform Building Code Standard No. 43–8, Thickness and Density Determination for Spray Applied Fireproofing.

Note: No recognized field bond strength test procedure exists for sprayed fireproofing materials with bond strengths greater than 1,000 psf (4,882 kg/m2) such as Monokote Z-156. Where bond strength specifications exceed 1,000 psf (4,882 kg/m2) it is recommended that independent laboratory test data based upon a modified version of ASTM E736 be submitted to verify specification compliance.

Safety

Monokote Z-156 is slippery when wet. Signs reading “SLIPPERY WHEN WET” should be posted in all areas in contact with wet fireproofing material. Anti-slip surfaces should be used on all working surfaces.

SDS (Safety Data Sheets) for Monokote Z-156 are available on our web site at www.gcpat.com or call toll free at 866-333-3SBM.

Performance Characteristics

Physical Properties

Recommended Specifications

Test Method/Notes**

Laboratory Tested Value*

Dry density

Min. 50 pcf (800 kg/m3)

ASTM E605

See note below***

Bond strength

Min. 10,000 psf (478 kN/m2)

ASTM E736

17,967 psf (857 kN/m2)

Compressive strength @ 10%
deformation

850 psi (5.86 MPa)

ASTM E761

1,059 psi (7.3 MPa)

Hardness

 40

ASTM D2240

 91
Yield

–

Theoretical maximum

13.3 board feet
(1.24 m2 at 25 mm) per bag
Color

–

Natural Concrete Gray

 –

Volatile Organic Content
(off gassing) at 122 °F
(50 °C) organic compounds
C6-C28

Less than 1 PPMW (part per million by
weight)

Dynamic headspace (Thermal
Desorption Gas Chromatography –
mass spectrometry)

Less than 1 PPMW
(below detectable limits)

Leachable ammonia

Less than 50 PPB– 50 ng/mg

Leachable ion by
ion chromatography

Less than 50 PPB
(below detectable limits)

* Independent laboratory tested value. Report available upon request.
** ASTM International test methods modi ed for bond strength and compressive strength, where required, for high density, high performance products.
*** All in-place performance tests should be conducted at or below the minimum recommended specification density. Test reports here were conducted at 39.6 pcf (635 kg/m3).

gcpat.it | Servizio clienti in Italia:: +39 02 93537291

We hope the information here will be helpful. It is based on data and knowledge considered to be true and accurate, and is offered for consideration, investigation and verification by the user, but we do not warrant the results to be obtained. Please read all statements, recommendations, and suggestions in conjunction with our conditions of sale, which apply to all goods supplied by us. No statement, recommendation, or suggestion is intended for any use that would infringe any patent, copyright, or other third party right.

Monokote is a trademark, which may be registered in the United States and/or other countries, of GCP Applied Technologies Inc. This trademark list has been compiled using available published information as of the publication date and may not accurately reflect current trademark ownership or status.

© Copyright 2017 GCP Applied Technologies Inc. All rights reserved.


GCP Applied Technologies Inc., 2325 Lakeview Parkway, Alpharetta, GA 30009, USA
GCP Italiana S.p.A. - Via Trento, 7 - 20017 Passirana di Rho, Milano, Italy
Questo documento è aggiornato solo a partire dalla data dell’ultimo indicato di seguito ed è valido solo per l'uso in Italia. È importante consultare sempre le informazioni attualmente disponibili sull'URL.di seguito per avere le informazioni sul prodotto più recenti al momento dell'uso. Documenti aggiuntivi come i manuali di utilizzo, bollettini tecnici, disegni dettagliati e raccomandazioni dettagliate e altri documenti rilevanti sono disponibili anche su www.gcpat.fr. Le informazioni trovate su altri siti web non dovrebbero essere utilizzati, in quanto potrebbero non essere aggiornati o applicabili alle condizioni del tuo paese e non ci assumiamo alcuna responsabilità quanto al loro contenuto. In caso di conflitti o se hai bisogno di ulteriori informazioni, contatta il servizio clienti di GCP.

Last Updated: 2022-11-24

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