Carboline Carbomastic 242

8614

Carboline Carbomastic 242 is a two-component, aluminium-pigmented, low temperature curing mastic designed for cold weather applications down to -18°C . This unique coating provides excellent corrosion resistance over existing finishes and rusted or SSPC-SP2 or SP3- cleaned steel.

  • Single coat application characteristics
  • Suitable as a topcoat for most tightly adhered existing coatings
  • Dry to handle in 24 hours at -7°C 
  • Extended pot life at low temperatures
  • VOC compliant to current AIM regulations
  • Flat finish

**Available for delivery - see Delivery Options below**

Colour
Size
Finish
£295.50
VAT excluded

£354.60 Tax incl.
Quantity

Description

Carboline Carbomastic 242 is a two-component, aluminium-pigmented, low temperature curing mastic designed for cold weather applications down to -18°C. This unique coating provides excellent corrosion resistance over existing finishes and rusted or SSPC-SP2 or SP3- cleaned steel.



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Features and Benefits


  • Single coat application characteristics
  • Suitable as a topcoat for most tightly adhered existing coatings
  • Dry to handle in 24 hours at -7°C 
  • Extended pot life at low temperatures
  • VOC compliant to current AIM regulations
  • Flat finish



Product Specification


Technical Data
Carboline Carbomastic 242
Volume Solids: 62% +/- 2%
Theoretical Coverage Rate: (24.4 m²/l at 25 microns
8.1 m²/l at 75 microns
2.4 m²/l at 250 microns
Allow for loss in mixing and application
Dry Film Thickness: 76 microns per coat over inorganic zinc primers
127 microns per coat over unprimed steel and existing coatings
254 microns applied in two coats for immersion service
Do not exceed 200 microns in a single coat
Dry Temperature Resistance: Continuous: 82°C 
Non-Continuous: 121°C 
Topcoats: May be topcoated with most two-pack topcoats
Limitations: May be coated with acrylics, epoxies, alkyds, or polyurethanes depending on exposure and need.
Flash Point: Part A:  16°C 
Part B: >100°C 
Shelf Life: Part A and B: Min. 24 months at  24°C 
Shelf Life: (actual stated shelf life) when kept at recommended storage conditions and in original unopened containers
Storage Temperature and Humidity: 2-43°C 
0-90% Relative Humidity



Performance Data
Test Method System Results
ASTM B 117 Salt Spray 2 cts over blasted steel

No blistering or rusting

No loss of adhesion

Rust in scribe. Less than 3/16 inch undercutting at scribe

ASTM D 3363 Pencil Hardness 1 ct. applied at 6 mils DFT >8H
ASTM D 4060 Abrasion

1000 cycles

1000 gm

Load CS-17 wheel 2 coats

169 mg loss
ASTM D 4541 Adhesion (Elcometer)

A) Blasted Steel

B) Rusted Steel

A) 710 psi B) 658 psi
ASTM D 4541 Adhesion (Pneumatic)

A) Blasted Steel

B) Rusted Steel

A) 1511 psi B) 1213 psi
ASTM D 522 Elongation

Conical Mandrel - One coat cured at:

A) 23°C         

B) 4°C

Distance from end of Mandrel to end of first crack:

A) ½ inch avg. Actual elongation: 40% avg

B) ¼ inch avg. Actual elongation: 74% avg



Drying Times


Curing Schedule
Surface Temp. Dry to Recoat Dry to Recoat and Topcoat with Other Finishes
-18°C  36 Hours 36 Hours
-7°C  24 Hours 24 Hours
10°C  12 Hours 12 Hours
24°C  4 Hours 4 Hours



  • These times are based on a 125 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
  • Maximum recoat/topcoat times are 30 days for epoxies and 90 days for polyurethanes at 24°C. Recoat intervals may vary from those listed above when using under intumescent fireproofing products
  • Consult Rawlins on Tech - 0113 2455450 (option 2) or [email protected] for recommended cure times before applying Carboline intumescent products
  • Excessive humidity or condensation on the surface during curing can interfere with the cure. If the maximum recoat time is exceeded, the surface must be abraded prior to the application of additional coats.
  • Note: This product contains conductive pigments and cannot be holiday tested



Curing Schedule For Immersion Service
Surface Temp. Final Cure Immersion
24°C 5 Days



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 with a 50- 75 micron surface profile
  • Non-Immersion: SSPC-SP6 with a 50-75 micron surface profile for maximum protection
  • SSPC-SP2, SP3, SP7, or SP12 are also acceptable methods

Galvanised Steel

  • SSPC-SP1 (Aged)
  • SSPC-SP16 (New)
  • When using under fireproofing products, defer to the primer surface preparation requirements in the product data sheet of the fireproofing product

Previously Painted Surfaces

  • Lightly sand or abrade to roughen and de-gloss the surface. Existing paint must attain a minimum 3A rating in accordance with ASTM D3359 “X-Scribe” adhesion test



Application Methods


Product Information
Mixing: Power mix separately, then add Part B to Part A and power mix
Do not mix partial kits
Thinning: May be thinned up to 25 oz/gal (20%) with Thinner 76 for spray, brush, or roller applications
For warmer temperatures, may be thinned up to 26 oz/gal (20%) with Thinner 72
Use of thinners other than those supplied by Carboline may adversely affect product performance and void product warranty, whether expressed or implied
Ratio: 4:1 Ratio (A to B)
Pot Life: 6 Hours at 2°C
3 Hours at 24°C
This material is moisture sensitive. Moisture contamination will shorten pot life and cause gelation. Pot life ends when coating become too viscous to use
Spray Application (General): This is a high solids coating and may require slight adjustments in spray techniques. Wet film thickness is easily and quickly achieved
Conventional Spray: Pressure pot equipped with dual regulators, 3/8” I.D. minimum material hose, 0.086” I.D. fluid tip and appropriate air cap
Airless Spray: Pump Ratio: 30:1 min
Volume Output: 3.0 gpm min
Material Hose: 3/8” I.D. min
Tip Size: 0.017-0.021”
Output PSI: 1900-2100
Filter Size: 60 mesh
Brush and Roller: Multiple coats may be required to obtain desired appearance, recommended dry film thickness and adequate hiding. Avoid excessive re-brushing or rerolling
Brush: Use a medium bristle brush
Roller: Use a short-nap roller cover with a solvent resistant core



Application Conditions


Product Conditions
Condition Material Surface Ambient Humidity
Minimum 2°C  -18°C -18°C 0%
Maximum 24°C  27°C 27°C 80%



  • 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
  • Note: In warm conditions, it is important to control film thickness, especially in overlap areas as excessive thickness may cause solvent entrapment



Health and Safety


Clean Up

  • 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 safety data sheet 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

  • 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.
  • In addition to ensuring proper ventilation, appropriate respirators must be used by all application personnel
  • Refer to the product data sheet and safety data sheet in the attachments section above for further details
Product Details
8614

Data sheet

Manufacturer
Carboline
For Use On
Galvanized Steel, Steel
Application Method
Brush, Roller, Spray
Sheen
Flat
Colour
Standard / Ready Mixed
Single, Two or Three Pack
Two-Pack
Pack Size
20L
Mixing Ratio
4:1 Ratio (A to B)
Dry to Recoat (at 20°C)
24 Hours
Coverage
994 ft²/gal at 1.0 mils (24.4 m²/l at 25 microns) - 331 ft²/gal at 3.0 mils (8.1 m²/l at 75 microns) - 99 ft²/gal at 10.0 mils (2.4 m²/l at 250 microns)
Recommended Thinner/Cleaner
Carboline Thinner 2
Compatible Topcoats
May be topcoated with most two-pack topcoats
Max. Application Temperature
Material: 75°F (24°C) - Surface: 80°F (27°C) - Ambient: 80°F (27°C) - Humidity: 80%
Min. Application Temperature
Material: 35°F (2°C) - Surface: 0°F (-18°C) - Ambient: 0°F (-18°C) - Humidity: 0%
Solids by Volume
62% +/- 2%
Shelf Life (from date of manufacture)
Part A and B: Min. 24 months at 75 °F (24 °C)
Recommended Dry Film Thickness
3 mils (76 microns) per coat over inorganic zinc primers - 5 mils (127 microns) per coat over unprimed steel and existing coatings - 10 mils (254 microns) applied in two coats for immersion service
UN Number
UN1263
Pot Life
6 Hours at 35°F (2°C) - 3 Hours at 75°F (24°C)
Attachments
Download


Customer agrees that before placing an Order, Customer has read and understood the most up to date Product Data Sheet for the Product. Where we have access to the Product Data Sheet from the manufacturer, we will either provide a copy on request, or include a link to the Product Data Sheet available on the manufacturer’s website. Customer further agrees that we have no liability for any errors or omissions contained within the Product Data Sheets. For more information, please see our Terms & Conditions of Sale.


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