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MONOKOTE FIREPROOFING

monokote
mk-6 hy
mk-6 s
z-146pc
z-146t
z-156pc
firebond

MONOKOTE® MK-6 HY

Spray Applied Steel and Concrete Fireproofing

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DATA SHEET
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SDS
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CERTIFICATE
Product Description

Monokote MK-6 HY and MK-6s are single component, spray applied, mill-mixed fire resistive plasters. MK-6 HY and MK-6s have approval for use on structural steel members and fluted decking to provide up to four hours of fire protection, and on flat plate cellular decking for up to three hours with Spatterkote® SK-3.
Note: Monokote MK-6 HY and MK-6s afford the same level of the fire protection at identical  protection thicknesses. By simply specifying Monokote MK-6, the fireproofing subcontractor can select the product that will provide the most efficient fire protection for the specific project conditions.

Features & Benefits

Monokote cementitious fireproofing offers many significant advantages to the architect, owner, applicator and building occupant. These include:
  • Proven in-place performance
  • Low in-place cost
  • Fast, efficient application
  • UL fire tested and factory inspected
  • Building Code compliant

Delivery & Storage
  • All material to be used for fireproofing shall be delivered in original unopened packages bearing the name of the manufacturer, the brand and proper UL labels for fire hazard and fire resistance classifications.
  • The material shall be kept dry until ready for use. Packages of material shall be kept off the ground, under cover and away from sweating walls and other damp surfaces. All bags that have been exposed to water before use shall be discarded. Stock of material is to be rotated and used before its expiration date.

Steel & Concrete Surfaces​
  • Prior to the application of Monokote MK-6, an inspection shall be made to determine that all steel surfaces are acceptable to receive fireproofing. The steel shall be free of oil, grease, 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 shall be the responsibility of the general contractor.
  • The project architect shall determine if the painted/primed structural steel to receive fireproofing has been tested in accordance with ASTM E119, to provide the required fire resistance rating.
  • Many Fire Resistance Designs allow the use of painted metal floor or roof-deck in place of galvanized decking. Painted decking must be UL listed in the specific fire resistance designs and must carry the UL classification marking. Consult your local GCP sales representative for details.
  • Prior to application of Monokote MK-6, a bonding agent, approved by the fireproofing
    manufacturer, shall be applied to all concrete substrates to receive MK-6.
  • Fireproofing to the underside of roof deck assemblies shall be done only after roofing application is complete and roof traffic has ceased.
  • No fireproofing shall be applied prior to completion of concrete work on steel decking.
  • Other trades shall not install ducts, piping, equipment, or other suspended items until the fireproofing is completed and inspected.
  • Other trades shall install clips, hangers, support sleeves, and other attachments that penetrate the fireproofing, prior to application of the fireproofing.

Performance Characteristics
PHYSICAL PROPERTIES RECOMMENDED SPECIFICATION LABORATORY TESTED* VALUES TEST METHOD
PHYSICAL PROPERTIESDry density, minimum average RECOMMENDED SPECIFICATION240 kg/m³ LABORATORY TESTED* VALUES240 kg/m³ TEST METHODASTM E605
PHYSICAL PROPERTIESBond strength RECOMMENDED SPECIFICATION9,6 kPa LABORATORY TESTED* VALUES16,9 kPa TEST METHODASTM E736
PHYSICAL PROPERTIESCompression, 10% deformation RECOMMENDED SPECIFICATION51 kPa LABORATORY TESTED* VALUES71 kPa TEST METHODASTM E761
PHYSICAL PROPERTIESAir erosion RECOMMENDED SPECIFICATION0,00 g/m² LABORATORY TESTED* VALUES0,00 g/m² TEST METHODASTM E859
PHYSICAL PROPERTIESHigh velocity air erosion RECOMMENDED SPECIFICATIONNo continued erosion
after 4 hours
LABORATORY TESTED* VALUES No continued erosion
after 4 hours
TEST METHODASTM E859
PHYSICAL PROPERTIESCorrosion RECOMMENDED SPECIFICATIONDoes not contribute to corrosion LABORATORY TESTED* VALUESDoes not contribute to corrosion TEST METHODASTM E937
PHYSICAL PROPERTIESBond impact RECOMMENDED SPECIFICATIONNo cracking, spalling
or delamination
LABORATORY TESTED* VALUESNo cracking, spalling
or delamination
TEST METHODASTM E760
PHYSICAL PROPERTIESDeflection RECOMMENDED SPECIFICATIONNo cracking, spalling
or delamination
LABORATORY TESTED* VALUESNo cracking, spalling
or delamination
TEST METHODASTM E759
PHYSICAL PROPERTIESResistance to mold growth RECOMMENDED SPECIFICATIONNo growth after 28 days LABORATORY TESTED* VALUESNo growth after 28 days TEST METHODASTM G21
PHYSICAL PROPERTIESSurface burning characteristics RECOMMENDED SPECIFICATION Flame Spread = 0
Smoke Developed = 0
LABORATORY TESTED* VALUES Flame Spread = 0
Smoke Developed = 0
TEST METHODASTM E84
PHYSICAL PROPERTIESCombustibility RECOMMENDED SPECIFICATIONLess than 5 MJ/m² total,
20 kw/m² peak heat release
LABORATORY TESTED* VALUES Less than 5 MJ/m² total,
20 kw/m² peak heat release
TEST METHODASTM E1354
Mixing
  • Monokote Fireproofing shall be mixed by machine in a conventional, plaster-type mixer or a continuous mixer specifically modified for cementitious fireproofing. The mixer shall be kept clean and free of all previously mixed material. The mixer speed in a conventional mixer shall be adjusted to the lowest speed which gives adequate blending of the material and a mixer density of 640–720 kg/m³ of material.
  • Using a suitable metering device and a conventional mixer, all water shall be first added to the mixer as the blades turn. Mixing shall continue until the mix is lump-free, with a creamy texture. All material is to be thoroughly wet. Target density of 688 ± 16 kg/m³ is most desirable. Overmixing will reduce pumping rate.

Application
  • Application of Monokote Fireproofing can be made in the following sequence:
    1. For thicknesses of approximately 13 mm or less, apply in one pass.
    2. For thicknesses of 16 mm or greater, apply subsequent passes after the first coat has set.
  • Spatterkote® SK-3 shall be applied to all cellular steel floor units with flat plate on the bottom and to roof decking where required prior to application of Monokote. Spatterkote shall be applied in accordance with manufacturer’s application instructions.
  • Monokote Fireproofing material shall not be used if it contains partially set, frozen or caked material.
  • The minimum average density shall be that required by the manufacturer, listed in the UL Fire Resistance Directory for each rating indicated, as required by the authority having jurisdiction, or minimum average 240 kg/m³, whichever is greater.
  • Monokote shall be mixed with water at the job site.
  • Monokote Accelerator is to be used with Monokote Fireproofing* to enhance set characteristics and product yield. The Monokote Accelerator is injected into the Monokote Fireproofing at the spray gun. Monokote Accelerator shall be mixed and used according to manufacturers recommendations.
  • Monokote 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 (38 KPa), will provide the correct hangability, density and appearance. NOTE: If freshly sprayed Monokote does not adhere properly, it is probably due to a too wet mix, poor thickness control, or an improperly cleaned  substrate.
* Use of accelerator with MK-6s will provide rapid set but will not result in yield increase.

Temperature & Ventilation
  • The substrate temperature shall be a minimum of 4,5 °C for at least 1-hour prior to the application of the Monokote. Additionally, the air and substrate temperature during application and for a minimum or 24 hours after application shall be no less than 4,5 °C.
  • Provisions shall be made for ventilation to properly dry the fireproofing after application. In enclosed areas lacking natural ventilation, air circulation and ventilation must be provided to achieve a minimum total fresh air exchange rate of 4 times per hour until the material is substantially dry.

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 the applicable building code.
  • The architect will select an independent testing laboratory (for which the owner will pay) to randomly sample and verify the bond strength of the fireproofing in accordance with the provisions of ASTM E736.
  • Results of the above tests will be made available to all parties at the completion of pre-designated areas which shall have been determined at a pre-job conference.

Safety
  • Monokote is slippery when wet. The general contractor and applicator shall be responsible for posting appropriate cautionary “SLIPPERY WHEN WET” signs. Signs should be posted in all areas in contact with wet fireproofing material. Anti-slip surfaces should be used on all working surfaces.
  • Safety Data Sheets (SDS) for Monokote MK-6/HY and MK-6s are available on our web site.
​Renotech Oy
​TURKU, ​FINLAND
VAT reg. nr. FI09674124
Open hours:
​Loading and unloading Mon-Fri 08.00–14.00 – 
​Click here for exceptions.​
Office hours: Mon-Fri 08.00–16.00 – ​Click here for exceptions.
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