Carboguard A-788, by Carboline

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.
SKU
Carboguard A-788, by Carboline
Grouped product items
Product Name Qty
Splash Zone Compound, A-788, 1/2-Gal Kit, by Carboline
$100.50
Splash Zone Compound, A-788, 1.8 Gal Kit, by Carboline
$232.75
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.

 


Application Equipment
    

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 & Thinning
   

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 & Safety
   

Cleanup

Use Thinner #2 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

Carboline Thinner #2

Cleanup & Safety
   

Cleanup

Use Thinner #2 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.

Application Conditions
   

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.

Curing Schedule
   
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)