Carboline Carboweld 11 is a weldable pre-construction inorganic zinc primer for shop use only. Designed to protect steel during construction phase of projects under normal conditions, Carboweld 11 can be topcoated for additional long-term protection for atmospheric exposures.

Welds made over Carboweld 11 coated steel are equal in every respect to welds made to uncoated steel. Can be welded as quickly and easily as bare steel at production line speeds without loss in strength or consistency of the weld.

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• Features and Benefits
• Product Specification
• Drying Times
• Surface Preparation
• Application Methods
• Application Conditions
• Health and Safety

Features and Benefits

• Weld spatter does not adhere to or damage the coating
• Dries to touch and to handle in 3 to 5 minutes
• Certified as a pre-construction primer for Lloyds Register constructions
• Grey in colour
• Flat finish

Product Specification

Drying Times

• Drying times are based on a 20-40 micron dry film thickness. Higher film thickness, insufficient ventilation or cooler temperatures will require longer cure times and could result in solvent entrapment and premature failure
• For shop applications or if the relative humidity is too low, the curing time can be reduced by raising the relative humidity by steam or water spray on the coated surface after an initial dry time of 1 hour at 24°C

Surface Preparation

General

• Remove all oil or grease from the surface to be coated with Thinner 2 or Surface Cleaner 3 (refer to Surface Cleaner 3 Instructions) in accordance with SSPC-SP1

Steel

• Abrasive blast to achieve a sharp angular profile of 1.0-1.5 mils for most applications. Where high build topcoats are used; 1.5-2.5 mil blast profile is recommended

Stainless Steel

• Abrasive blast to a 1-1.5 mil profile and apply material direct to substrate or over appropriate nonzinc primer
• Immersion (see Limitations): SSPC-SP10
• Non-Immersion: SSPC-SP6

Welding Data

• Automatic- Carboweld 11 when applied at recommended thickness may be welded at speeds up to 48” per minute. This is dependent upon plate thickness and bead size. This includes the following processes: 1) Submerged arc 2) Flux core 3) Short arc and 4) Metal Inert Gas (MIG)

Application Methods

Application Conditions

• 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

Health and Safety

Clean Up

• Use Thinner 21 or Isopropanol
• 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 safety data sheet for this product and use personal protective equipment as directed
• Employ normal workmanlike safety precautions
• Hypersensitive persons should wear protective clothing, gloves and use protective cream on face, hands, and all exposed areas

Ventilation

• 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 respirator

• Refer to the product data sheet and safety data sheet in the attachments section above for further details