Carboguard A-788, by Carboline

SKU#: 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.

Grouped product items

  • 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)