Monokote® Z-146PC


It Developed as a superior product to protect steel and concrete meeting the harshest conditions found in petrochemical processing, refinery facilities, LNG facilities, offshore platforms, nuclear and conventional power plants, etc. It is a Portland cement based fireproofing formulated with bauxite and DCI requiring only the addition of water on site to form a consistent, pumpable and trowellable slurry. Weighing approximately 65–75% less than regular concrete, it can be applied at several thicknesses offering up to 4 hours hydrocarbon pool fire resistance.

It is not recommended in operating temperatures in excess of 93°C, for use over aluminium or other non-ferrous substrates, or use as a refractory material.

Features and Benefits:

  • Durability: It sets and dries to a hard, damage resistant coating offering resistance against physical impacts occurring during routine operations and maintenance at the facility. It has been tested for bond, compressive strength, hardness and other properties in accordance with API RP 2218 and ASTM inplace performance standards.
  • Application versatility: It can be mixed in standard plaster mixers. After mixing it may be spray-applied with commonly available pumping and spraying equipment for high speed efficient application. It can also be applied with trowels and poured into wood formworks.
  • Economical: It offers cost effective fire resistance in interior as well as exterior and corrosive environments such as those defined by ISO 12944-2 up to corrosion class C5-I and C5-M.


  • Superior bond and mechanical properties.
  • Low thermal conductivity.
  • Crack free formula.
  • Up to 25 mm per coat.
  • High yield rates.
  • Non flammable and non combustible.
  • Asbestos free.
  • Chloride and sulfide free.
  • No contribution to gas or smoke generation during a fire.

Fire tested:

Z-146PC has been tested in accordance with:

  • UL 1709 – up to 4 hours.
  • BS 476 Part 20 appendix D – up to 2 hours.
  • UL 263 – up to 4 hours.
  • Investigated by UL for exterior use even under freeze/thaw cycles.
  • Jet fire tested with HSE standard OTI 95634 – up to 2 hours.
  • Explosion tested to a charge of 227 Kg of TNT placed 19 meters away.
  • Tested under cryogenic conditions.

General information

Uniclass 2015

Pr_35_31_64_12 Cementitious rendersPrimary


M22/120 Sprayed

Specification data - Cementitious renders

Product Reference

Monokote® Z-146PC


30 minute fire rating to BS 476-21

60 minute fire rating to BS 476-21

90 minute fire rating to BS 476-21

120 minute fire rating to BS 476-21

180 minute fire rating to BS 476-21

240 minute fire rating to BS 476-21

Standard product features

Bonding agent:

Concrete substrates require the application of a suitable, approved bonding agent - seek advice from GCP.




To BS 476-4, Class.

Dry density:

640 kg/m³ (40 pcf).

Finishing/ Sealing coat:

Seek advice from GCP.

Product Options


A minimum thickness of 10 mm is recommended and a thickness up to 84 mm can be applied. Alternatively, a fire rating to BS 476-21 (30 minutes - 4 hours) can be specified. Refer to the Hp/A table supplied by GCP and/ or ASFP yellow book.


- Primer:

It has been formulated with a special Direct Corrosion Inhibitor that has shown to retard the rate of corrosion due to chlorides and other aggressive environmental conditions.

It shall not be used as an anticorrosive material, thus the use of an alkaline resistant, immersion grade, epoxy-polyamide coating (or system) compatible with Portland cement is recommended.

- Topcoat:

Generally not required, however in very corrosive environments a compatible breathable topcoat should be used to extend the life expectancy of the entire system. Contact GCP Technical Service for further recommendations.

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