DELIVERY AND STORAGE

A. Delivery:

All material is to be delivered in original unopened packages bearing the name of the manufacturer, the brand and proper Underwriters’ Laboratories, Inc. label for fire resistance classification.

B. Storage:

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 which have become wet before use shall be discarded. Stock of material is to be rotated and used before its expiration date.

MIXING AND PUMPING STATION

A. Placement:

The entire working and storage area should be covered from rain and construction water with the material stored to prevent contact with water on the floor. All wet bags must be discarded.

B. Equipment:

Type 7TB^TM Thermal Barrier pumps well with most pumps used for cementitious fireproofing materials. Progressive cavity, hydraulic driven piston and mechanically driven piston pumps have provided good field performance.

C. Set Up:

The pump should be as close as possible to the work. This permits hose length to be minimized. Place the mixer next to and above the pump hopper. It should be high enough to permit full rotation to the complete dump position. Wash water should be drained away from the pump area.

MIXING PROCEDURE

A. Sequence of Operations

1. Check to make sure mixer bowl and blades are clean.

2. Adjust the mixer speed to 30-40 rpm.

3. Add water to the mixer first. Use approximately 10 U.S. gallons per bag of Type 7TB^TM Thermal Barrier. This is the recommended starting point of water addition. Do not over water because too much water will reduce the quality of the finished product. Water is to be clean, fresh, suitable for domestic consumption and free from such amounts of mineral or organic substances that would affect the set of the Portland cement.

4. Add bags of Type 7TB^TM Thermal Barrier with the mixer blades turning.

5. Mix for approximately 60 seconds. Adjust the water as required to obtain the desired mix consistency for spraying or trowelling.

6. Let the mixer blades turn for approximately 10 seconds to re-blend before dumping. Dump entire batch. The mixer must empty completely when dumped to avoid leaving any old mix to be reworked in succeeding batches.

B. Precautions

1. Occasionally scrape the inside walls of the pump hopper.

2. Wait until enough material has been pumped out of the hopper to allow sufficient room for the addition of the entire new batch from the mixer.

3. If the pump hopper will not take an entire batch, stop the mixer until the remaining material can be discharged. Restart the mixer for 10 seconds before dumping the remaining material.

4. Mixing by hand is specifically not recommended for Type 7TB^TM Thermal Barrier.

5. Type 7TB^TM Thermal Barrier should not be reworked. Normal working time is 30 minutes at 75⁰F (24⁰C.) Clean mixer to prevent contamination of fresh material with partially set material.

6. The immediate mixing area is likely to be dusty so mixing personnel should wear approved dust masks and work in a ventilated area.

PUMP START-UP

1. About 2 gallons of water should be added to the mixer with the blades turning, and then dumped into the pump hopper.

2. The first Type 7TB^TM Thermal Barrier mix should be prepared and the pump started. The mix is to be dumped into the pump hopper when the last of the water enters the pump intake. DO NOT LET THE PUMP RUN DRY.

3. Pumping should continue until the water and a small amount of Thermal Barrier has passed out of the end of the hose.

4. The nozzle is to be attached to the whip hose with the air stem pulled back and the air reduced at the nozzle. This leaves an unrestricted path for material to flow through the orifice.

5. After material flow has started, the air pressure is to be increased and the air stem adjusted to give an acceptable spray pattern.

6. If a blockage occurs at the orifice, the pump should be stopped, the rubber cap removed and the orifice cleaned.

APPLICATION

1. Minimum air and substrate temperatures of 40⁰F (4.5⁰C) shall be maintained for 24 hours before and after application of fireproofing.

2. Type 7TB^TM Thermal Barrier must be applied to a firm base material which has set to form a sound substrate for the Thermal Barrier.

3. Type 7TB^TM Thermal Barrier MUST NOT BE APPLIED OVER A DIRTY OR DETERIORATED SUBSTRATE. If the substrate is not in a sound condition free of grease, oil, dirt or other contaminants that would prevent adhesion of the Thermal Barrier, it must be cleaned, scraped or otherwise treated to provide a sound substrate.

4. The texture of the Type 7TB^TM Thermal Barrier can be varied by the air pressure and air stem position at the nozzle. The recommended pressure is 15 psi, although a slightly higher pressure will result in a finer texture. Small orifices will also provide a lightly textured surface.

5. Type 7TB^TM Thermal Barrier can be finish trowelled or dry brushed immediately after application to a smooth finish. Avoid overworking the trowelled surface.

6. Do not use additional water to finish the Thermal Barrier.

7. Type 7TB^TM Thermal Barrier is to be applied in a nominal ½" thickness.

MASKING AND CLEAN-UP

1. Masking is required to protect sensitive equipment, aluminum and other surfaces not scheduled to be coated which can not be easily cleaned.

2. Over-sprays of Thermal Barrier may be cleaned up with water before the material sets. Type 7TB^TM Thermal Barrier adheres tenaciously to most surfaces when set and cured. Therefore, Thermal Barrier over-spray must be removed before it sets.

PUMP SHUT DOWN PROCEDURES

THOROUGH WASHING AND FLUSHING IS NECESSARY TO PREVENT MATERIAL FROM SETTING AND ACCUMULATING IN THE HOSES AND FITTINGS.

1. After the last mix of the day has cleared the hopper, the pumping speed should be reduced and large amounts of water pumped through the system. A sponge can also be pumped through the hose by removing the hose at the pump manifold and placing the sponge directly into the hose.

2. At least two minutes of clear water should pass through the nozzle before the pump is shut off.

3. After the pump is shut off, all fittings should be disassembled and cleaned.

SAFETY

A. Type 7TB^TM Fireproofing 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 working surfaces such as scaffolding.

B. Read and post the Material Safety Data Sheet.

PAINTING OF TYPE 7TB^TM THERMAL BARRIER

Type 7TB^TM Thermal Barrier may be painted to achieve a specific color. Paint to be suitable for application to Portland cement surfaces and applied in accordance with manufacturers written instructions.

End of section 2/2005

Southwest Fireproofing Products Company, Albuquerque, NM 87107 Phone: (505) 345-1633

©2004 Southwest Fireproofing Products Co.

Southwest Fireproofing, Type 5GP, Type 5EF, Type 5MD, Type 7GP, Type 7HD, Type 1XR, Type DK, Type HC and Type 7TB

are trademarks of Southwest Fireproofing Products Co.

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