MONOKOTE® MK-1000/HB Extended Set Product Data Sheet

Product Description

MONOKOTE® MK-1000 HB Extended Set fireproofing is a single component, mill-mixed fireproofing plaster (cementitious) which has a delayed set feature. MK-1000 HB Extended Set is the same as MK-1000 HB, except this product can be left unattended in the delivery system for up to 4 days. The MK-1000 HB Extended Set product requires the addition of water to form a consistent, pumpable slurry. To achieve proper setting time, MONOKOTE® Accelerator must be injected into MONOKOTE® MK-1000 HB Extended Set fireproofing during product application. In addition, a dye marker material should be added when Extended Set is introduced per mixing and application instructions. This product can be used on structural steel columns, beams, joists, trusses, floors and roof decking.

Features & Benefits

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 of 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-1000 HB Extended Set fire resistive plaster, 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, non compatible 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-1000 HB Extended Set fire resistive plaster, a bonding agent, approved by the fire proofing manufacturer, shall be applied to all concrete substrates to receive MK-1000 HB Extended Set.
• 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

^{*Actual laboratory tested values meet or exceed GCP's recommended value. Test reports are available on request from your GCP's sales representative.}

Temperature & Ventilation

• The substrate temperature shall be a minimum of 40°F (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 40°F (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-1000 HB Extended Set fire resistive plaster are available on our web site or by calling 866-333-3SBM.