BURN BARRIER™ MASTIC NO. 50-44 Has a 1 Hour Rating
BURN BARRIER™ 50-44 is an asbestos free reinforced Intumescent thermal protective coating,
designed for application to interior structural steel, where it is necessary or desirous to
increase the steel fire endurance time.
Mastic FR. 50-44, when applied at a wet film thickness of 3/16 inch (8.55 sq.ft./U.S. gallon)
[4.76mm (0.21 m2/L), on W8 x 24 and W8 x 28] (W200 x 36 and W200 x 42), and on 6 x 10
inch (152 x 235MM) wood beams,as described in ULC design numbers 0600, M600, R600,
and fire tested in accordance with ASTM E-119 (UL-263, ULC-CAN 4-5101, NFPA-251) has
been assigned fire resistant rating of 1 hours depending on the design and
components used, reference Underwriters’ laboratories label and test reports.
The coating dries to a hard, flexible finish that withstands structural movement and vibrations,
does not dust, flake, spill or crack.
Spray application yields a textured, stucco-like finish, or can be lightly troweled to a relatively
Mill scale, surface rust, grease, dirt, and dust should be removed. Steel should be primed with
flame Control No. 3004 Universal Metal Primer, No. 3005 Two Part Epoxy Primer or other
good quality metal primer. Allow primer to thoroughly dry before applying Mastic BURN
Using a Jiffler double-bladed mixer, thoroughly mix Mastic BURN BARRIER™ 50-44. For
SPRAY GUN application, generally each 5 gallon pail should be thinned (diluted) with approximately
1 quart of xylene (xylol). For HOPPER GUN application additional thinning may be
required to obtain good flow in the hopper.
Application Equipment and Procedures:
Mastic BURN BARRIER™. 50-44 can be spray or trowel applied (Note: See CAUTION section).
When TROWEL applied, the tools must be kept wet with mineral spirits to avoid sticking
or pulling. For HOPPER GUN application, use a 1/4 inch gun nozzle opening, with
approximately 25 to 30 lbs. air pressure-HEAVY DUTY SPRAY, suggest Graco Equipment:
GUN Model No. 204-000, Series G9H. TIP: External mix, horn type No. 163-660. PUMP:
President 10-1 texture, equipped with evenflow valve system. HOSES: Material: 3/4 inch ID
(minimum), solvent resistant, reinforced, with a 5 foot long, 3/4 inch ID whip section at
gun,fitting at gun should be quick connecting swivel type. Maximum hose length 100 feet.
AIR HOSE TO GUN: 3/8 inch ID (minimum). AIR COMPRESSOR TO PUMP HOSE: 3/4 inch
ID (minimum). COMPRESSOR: Must be capable of maintaining 85 PSI (minimum) when
straying. The above equipment is given as a guide. Other manufacturer's equipment
meeting similar specification can be used.
Start UP Procedures for Heavy Duty Equipment:
STEP 1 Follow "CAUTION" section. Place CAUTION signs in area, warning others that
spray painting is in progress, and that flammable vapors are present in the area. Check
to ensure that all flames, fires, and other sources of ignition have been extinguished and
turned off. Coated area must remain roped off, with CAUTION, FLAMMABLE VAPOR" signs
until the coating has thoroughly dried. STEP 2. Pumn, hoses, and gun must be clean. Set
up equipment and place pump in empty open-head. 55 gallon drum. STEP 3 Using a Jiffler
double bladed mixer, thoroughly mix 4 to 8 five gallon pails of Flame Control Mastic BURN
BARRIER™. 50-44. Each five gallon pail should be thinned (diluted) with approximately 1
quart of xylene (xylol). STEP 4 Dump the thinned (diluted), thoroughly mixed, Mastic BURN
BARRIER™ .50-44 into the 55 gallon drum. STEP 5 Remove fluid hose at gun and start
puma. Pump until mastic has completely filled the material hose, then reattach the hose
to the gun. STEP 6 Adjust evenflow valves to obtain the following pressure settings;
Material, 15 to 35 PSI, Atomizing air, 20 to 40 PSI. These pressure settings are generally
suitable for most conditions. Material pressure should be kept at the lowest possible
setting to obtain a smooth uniform flow. STEP 7 Test spray a small area, adjust pressure
settings to obtain a good spray pattern,then proceed with the application. Check wet film
every few minutes, to insure that the proper film thickness is being applied. Be sure all
surfaces, including edges, are properly coated. NOTE If spraying is to be discontinued for
more than 3 or 4 minutes, the material pressure should be shut off at the pump. Release the
material line pressure by triggering the gun, then remove the material hose at the gun and
wash out gun in xylene (xylol). This procedure is very important to prevent material from
packing up at the gun arid in the hose.
Clean equipment immediately after use with Xylene (xylol) or mineral spirits.
Dries to touch in about 2 hours, hard enough for area use in 24 to 48 hours (See CAUTION
section). Continues to cure to a very tough film. Full cure; under normal drying conditions, the
coating will fully cure in 5 to 8 days. The speed of cure depends on the air temperature and
Should an area be damaged, the coating can easily be repaired, using a putty knife or trowel.
Before starting job, place CAUTION signs in area, warning others that painting is in progress, and the
FLAMMABLE VAPORS are present in the area. Check to ensure that all flames and other sources of
ignition have been turned off and are extinguished. Coated area MUST remain roped off, with
“CAUTION, FLAMMABLE VAPOR” signs until the coating has thoroughly dried. The coating
contains volatile (FLAMMABLE) solvents. Care must be exercised during and after application until
the coating is fully dried, to minimize the possibility of an accumulation of flammable vapors. Such
accumulations may be indicated by strong solvent odors.
WARNING: FLAMMABLE LIQUID & VAPOR CONTAINS XYLENE & PETROLEUM
VAPOR HARMFUL. MAY AFFECT THE BRAIN OR NERVOUS SYSTEM CAUSING DIZZINESS,
HEADACHE OR NAUSEA. CAUSES EYE, SKIN, NOSE AND THROAT IRRITATION. NOTICE:
Reports have associated repeated and prolonged occupational overexposure to solvents with permanent
brain and nervous system damage. Intentional misuse by deliberately concentrating and inhaling the
contents may be harmful or fatal. Keep away from heat, sparks and flame. VAPORS MAY CAUSE
FLASH FIRE. Do not smoke. Extinguish all flames and pilot lights, and turn off stoves, heaters,electric
motors and other sources of ignition during use and until all vapors are gone. Prevent build-up of vapors
by opening all windows and doors to achieve cross-ventilation.
USE ONLY WITH ADEQUATE VENTILATION. Do not breathe vapors or spray mist. Ensure fresh air
entry during application and drying. If you experience eye watering, headache or dizziness or if air
monitoring demonstrates vapor/mist levels are above applicable limits, wear an appropriate, properly
fitted respirator (NIOSH/MSHA approved) during and after application. Follow respirator manufacturer’s
directions for respirator use. Close container after each use. Avoid contact with eyes, skin and
clothing. Wash thoroughly after handling.
FIRST AID: If you experience difficulty in breathing, leave the area to obtain fresh air. If continued
difficulty is experienced, get medical assistance immediately. In case of eye contact, flush immediately
with plenty of water for at least 15 minutes and get medical attention; for skin, wash thoroughly with
soap and water. If swallowed, get medical attention immediately. If spilled, contain spilled material and
remove with inert absorbent. Dispose of contaminated absorbent, container and unused contents in
accordance with local, state and federal regulations.
KEEP OUT OF REACH OF CHILDREN
READ MATERIAL SAFETY DATA SHEET BEFORE OPENING CONTAINERS:
Information provided herein is based on information available at the time of printing. However, we make no
guarantee or warranty that this product meets or complies with any federal, state, local or foreign government
code requirements. As we cannot anticipate all conditions under which this information and our products, or the
products of other manufacturers in combination with our products, may be used, we accept no responsibility for
results obtained by the application of this information or the safety and suitability of our products, either alone
or in combination with other products. Users are advised to make their own tests to determine the safety and
suitability of each such product or product combination for their own purposes. We sell our products without
warranty or guarantee, and buyers and users assume all responsibility and liability for loss or damage arising
from the use of this information, handling and use of our products, whether used alone or in combination with