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Carboguard A-788 Splash Zone Mastic
By Carboline
Bitumastic 300M Overview |
Bitumastic 300M Specs |
Bitumastic 50 |
Carboguard
A-788
Selection &
Specification Data
|
| Generic
Type |
Epoxy
Polyamide |
| Description |
Solvent-free
patching compound used for repairing pits, cracks and voids in steel,
concrete, wood and other surfaces. Has the unique ability to be mixed,
applied and cured underwater. |
| Features |
•
Designed for underwater and other wet applications.
• Can be applied up to 2" in thickness.
• Self-priming on most surfaces and over most generic types of coatings.
• Rapid cure characteristics.
• VOC compliant to current AIM regulations. |
| Color |
Olive
Green |
| Finish |
Low Gloss |
| Primers |
Self-priming |
| Topcoats |
Epoxies,
Polyurethanes if required. |
| Dry Film
Thickness |
1/8"-2"
(3.1-50 mm) for most applications.
1/4" (6.4 mm) is practical maximum thickness for vertical and
overhead applications. |
| Solids Content |
By
Volume: 99% ± 1 |
| Theoretical
Coverage Rate |
1604
mil ft2 (24.5 m2/I at 25 microns). Allow for loss in
mixing and application. Field experience has displayed a realistic
coverage rate of 8 ft2/gallon (.2 m2/I). This figure accounts
for actual losses and the fact that the product is frequently applied at
higher dry film thicknesses. |
| Nominal VOC
Values |
As
supplied: 0.00 Ibs/gal (0 g/I) |
| Dry Temperature
Resistance |
Continuous:
200°F (93°C)
Non-Continuous: 250°F (121°C) |
Substrates &
Surface Preparation
|
| General |
Remove
all oil or grease from the surface with Carboline Surface Cleaner 3 in
accordance with SSPC-SP1.
Remove all dirt, loose paint, sparring
concrete, rotted wood, marine growth and other contaminants by abrasive
blasting or high pressure water blasting.
Hand or power tool cleaning methods may
be used but are of limited benefit and are time consuming.
Abrasive blasting can be done underwater
as the initial air blast will clear a path through the water for the
abrasive/air mixture.
When working at the splash zone or in
salt water, coat cleaned metal surfaces as soon as possible to minimize
new corrosion. |
| General |
Apply
by hand, trowel or broad knife. Spread material smoothly onto the
surface in a 1/8" to 1/4" (3.1 to 6.4 mm) thick layer using
enough pressure to displace water and air bubbles. Smooth out the area
by hand. When starting another mix, start spreading at and away from the
previous applied film. This will help prevent trapped air bubbles or
leaving an area uncoated.
If applying to dry surfaces in dry air,
periodically rewet hands or tools with water to keep the product from
sticking.
When used as a patch or grout, force the
material into the hole or crack and smooth by hand to the thickness
needed. For larger patches greater than 1/2" (12.7 mm), use a steel
or fiberglass plate for added support. Apply A-788 to the substrate,
then embed the support plate (cut larger than the hole) and apply A-788
overall.
When applied underwater or when wetted
with water during application, the surface of A-788 will form an
emulsified lighter green "scum" layer. This layer is normal
and facilitates application. The film under the "scum" layer
remains undisturbed and will cure properly. The "scum" layer
will cure and become part of the finish when A-788 is cured above water;
however, this layer will remain soft and uncured when the A-788 is kept
underwater during curing. |
| Mixing |
Mix
one Part A to one Part B by volume. Mix by hand "scooping" a
quantity of the "A" component from the can and then
"scoop" the same quantity of the "B" component from
its can. Mix and knead the two components by hand until the yellow and
black colors have combined to make a uniform olive green color. Apply
this mixture immediately after mixing; no sweat-in time is required. To
assist in mixing, keep the gloved hands and the materials wet with water
during the mixing process. |
| Thinning |
Not
recommended. Use of thinners other than those supplied or recommended by
Carboline may adversely affect product performance and void product
warranty, whether expressed or implied. |
| Pot
Life |
Working
times at 70°F (21 °C), below and above water:
- Golf ball size mix: 40 minutes
- Baseball to softball size mix: 30 minutes
- Gallon mix: 15 minutes
Working times are reduced by one-half at temperatures above 80°F
(27°C).
Do not mix more material than can be
applied in the working times listed. The material may still appear to be
workable after the time limit is exceeded, but it will not properly
adhere to the substrate after application and curing. |
| Cleanup |
Use #2 Thinner or Acetone. 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
used as a tank lining or in 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 supplied air 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. |
|
MSDS |
-
MSDS A-788
Part A,
MSDS A-788 Part B |
| Cleanup |
Use #2 Thinner or Acetone. |
| 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.
Some people may be sensitive to the epoxy
resins used in this material, so tight fitting rubber gloves should
always be worn during the mixing process.
When used for marine applications in
splash zone areas, use all necessary precautions to protect the
applicators. Wear wet or dry suits if necessary to help preserve body
heat and use approved life jackets and safety lines. Avoid working in
rough water. |
| Condition |
Material |
Surface |
Ambient |
Humidity |
| Normal |
65°-75°F
(18°-24°C) |
60°-80°F
(16°-27°C) |
60°-80°F
(16°-27°C) |
30-70% |
| Minimum |
50°F (10°C) |
50°F (10°C) |
50°F (10°C) |
0% |
| Maximum |
100°F
(38°C) |
110°F
(43°C) |
100°F
(38°C) |
100% |
Special application techniques may be required above or below
normal application conditions. Do not apply or cure in acidic or
alkaline water (pH less than 6 or greater than 9) or in solutions
containing solvents.
|
| 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) |
6
Hours |
16 Hours |
10
Days |
Backfilling/Burial: May be started 7 days after the final coat
is applied, providing the surface temperature has remained above 70°F
(21°C), or 5 days at 90°F (32°C). These times are based on a 14.0
mil (350 micron) dry film thickness. Higher film thickness,
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 RP018890 for
specific procedures.
|
Packaging, Handling
& Storage
|
| Shipping Weight
(Approximate) |
1 Gallon,
13 lbs (6 kg) |
5 Gallons,
65 Ibs (30 kg) |
|
Flash Point (Setaflash) |
102°F
(39°C) |
|
Storage (General) |
Store
Indoors. |
|
Storage Temperature &
Humidity |
40°110°F
(4°-43°C),
0-100% relative humidity |
|
Shelf Life |
24
months at 75°F (24°C) |
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