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Specifications
Bitumastic 50 Coal Tar Mastic
By Carboline
Ultra-high build, single-component coal tar
mastic for protecting
steel and concrete substrates subject to aggressive conditions
and for below grade damp proofing requirements.
Bitumastic 300M Overview |
Bitumastic 300M Specs |
Bitumastic 50 |
Carboguard
A-788
Selection &
Specification Data
|
| Generic |
Coal Tar |
| Description |
Ultra-high build, single-component coal tar mastic for protecting steel and
concrete substrates subject to aggressive conditions and for below grade
damp proofing requirements. |
| Features |
Application up to 30 dry mils (750 microns) in a single coat.
Self priming, single-coat capabilities.
Excellent corrosion resistance.
Complies with MIL-C-18480-B and Bureau of Reclamation CA50 specifications. |
| Color |
Black (0900) |
| Finish |
Low gloss.= |
| Primers |
Self-priming |
| Topcoats |
Not recommended |
| Dry Film
Thickness |
18.0 mils (450 microns) in one or two coats.
Total dry film thickness less than 12 mils (300 microns) or in excess of 30
mils (750 microns) not recommended. |
| Solids Content |
By
volume: 68% ± 2% |
| Theoretical
Coverage Rate |
1090 mil ft2 (26.7 m2/l at 25 microns).
Allow for loss in mixing and application |
| Nominal VOC
Values |
As supplied: 3.0 lbs./gal (360 g/l)
Thinned: 12 oz/gal w/ #10 thinner, 3.5 lbs./gal (417 g/l) |
| Dry Temperature
Resistance |
Continuous: 350°F (177°C)
Non-continuous: 400°F (204°C) |
| Wet Temperature
Resistance |
Immersion temperature should not exceed 120°F (49°C). |
| Limitations |
Do not use for
potable water requirements. |
Substrates &
Surface Preparation
|
| General |
Surfaces must be clean and dry. Employ
adequate methods to remove dirt, dust, oil and all other contaminants
that could interfere with adhesion of the coating. |
| Steel |
Immersion: SSPC-SP10
Non-Immersion: SSPC-SP6 for maximum protection. SSPC-SP2 or SP3 as
minimum requirement.
Surface Profile: 2.0-3.0 mils (50-75 micron) |
|
Galvanized Steel |
Non-Immersion: Sweep blast to roughen
surface and produce a 1.0-2.0 (25-50 micron) profile. |
| Concrete |
Concrete must be cured 28 days at 75° F (24°
C) and 50% relative humidity or equivalent. Prepare surfaces in
accordance with ASTM
D4258 Surface Cleaning of Concrete and ASTM D4259 Abrading Concrete.
Voids in concrete may require surfacing. |
Application Equipment
Listed below are general equipment
guidelines for the application of this
product. Job site conditions may require modifications to these
guidelines
to achieve the desired results.
|
| Spray Application
(General) |
This is a high solids coating and may
require adjustments in spray techniques. Wet film thickness is easily
and quickly achieved. The following spray equipment has been found
suitable and is available from manufacturers such as Binks, DeVilbiss
and Graco. |
| Conventional Spray |
Pressure pot equipped with dual regulators,
3/8” I.D. minimum material hose, with 50' maximum material hose .086”
I.D. fluid tip and appropriate air cap. |
| Airless Spray |
Pump Ratio: 30:1
GPM Output: 3.0 (min.)
Material Hose: 3/8” I.D. (min.)
Tip Size: .023-.035”
Output PSI: 2300-2500
Filter Size: 30 mesh
Teflon packings are recommended and available from the pump
manufacturer. |
| Brush & Roller
(General) |
Recommended for touch up and striping of
weld seams and hard-to-coat areas. Avoid excessive rebrushing or
re-rolling. |
| Brush |
Use a medium bristle brush. |
| Roller |
Use a short-nap synthetic
roller cover with phenolic core. |
| Mixing |
Power mix until uniform in consistency. |
| Thinning |
May be thinned up to 12 oz/gal (10%) with
Thinner #10 if needed. When used directly to concrete, thinning is
required on the first coat to provide adequate “soak-in”. Use of
thinners other than those supplied or recommended by Carboline may
adversely affect product performance and void product warranty, whether
expressed or implied. |
| Cleanup |
Use Thinner #2 or Xylene. In case of
spillage, absorb and dispose of in accordance with local applicable
regulations. |
| Safety |
Read and follow all caution statements on
this product data sheet and on the MSDS for this product. Employ normal
workmanlike safety precautions. Hypersensitive persons should wear
protective clothing, gloves and use protective cream on face, hands and
all exposed areas. |
|
Ventilation |
Warning: Vapors may cause explosion. When
usedin enclosed areas, thorough air circulation must be used during and
after application until the coating is cured. The ventilation system
should be capable of preventing the solvent vapor concentration from
reaching the lower explosion limit for the solvents used. User should
test and monitor exposure levels to insure all personnel are below
guidelines. If not sure or if not able to monitor levels, use MSHA/NIOSH
approved respirator. |
| Caution |
This product contains flammable solvents.
Keep away from sparks and open flames. All electrical equipment and
installations should be made and grounded in accordance with the
National Electric Code. In areas where explosion hazards exist, workmen
should be required to use non-ferrous tools and wear conductive and
non-sparking shoes. |
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MSDS |
Bitumastic 50 |
| Condition |
Material |
Surface |
Ambient |
Humidity |
| Normal |
60°-85°F
(16°-29°C) |
60°-85°F
(16°-29°C) |
60°-90°F
(16°-32°C) |
0-80% |
| Minimum |
50°F (10°C) |
50°F (10°C) |
50°F (10°C) |
0% |
| Maximum |
90°F (32°C) |
125°F (52°C) |
110°F (43°C) |
90% |
Industry standards are for substrate temperatures to be above
the dew point. This product simply requires the substrate
temperature to be above the dew point. Condensation due to substrate
temperatures below the dew point can cause flash rusting on prepared
steel and interfere with proper adhesion to the substrate. Special
application techniques may be required above or below normal
application conditions.
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| Surface
Temp. & 50% Relative Humidity |
Dry to Touch |
Minimum
Recoat Time |
Cure for
Immersion |
| 50°F (10°C) |
24
Hours |
36
Hours |
30
Days |
| 75°F (24°C) |
12
Hours |
24
Hours |
14
Days |
| 90°F (32°C) |
8
Hours |
16
Hours |
7
Days |
Backfilling/Burial: May be started 7 days after the final coat
is applied, providing the surface temperature has remained above
60°F (16°C). These times are based on an 18.0 mil (450 micron) dry
film thickness. Higher film thicknesses, insufficient ventilation,
high humidity or cooler temperatures will require longer cure times.
Holiday Detection (if required): Wet sponge types may be used if the
dry film thickness is below 20 mils (500 microns). High voltage
spark testing should be used when the dry film thickness exceeds 20
mils (500 microns). Refer to NACE RP0188-90 for specific procedures.
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Packaging, Handling
& Storage
|
| Shipping Weight
(Approximate) |
1 Gallon: 13 lbs. (6 kg) |
5 Gallons: 65 lbs (30 kg) |
|
Flash Point (Setaflash) |
80°F (26°C) |
|
Storage (General) |
Store
Indoors. |
|
Storage Temperature &
Humidity |
40°110°F
(4°-43°C),
0-100% Relative Humidity |
|
Shelf Life |
Min. 24 months at 75°F (24°C) |
Shelf Life:
Actual stated shelf life when kept at recommended
storage conditions and in original unopened
containers.
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Bitumastic
is a century-old trade name that is often associated with long-term protection
from water penetration. Typically made from coal tars and blends of resins such
as epoxy, these products have been used as tank linings, to coat the interior and exterior
of buried pipe, and to protect equipment subjected to water immersion.
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