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Series 237SC | ChemBloc

Generic Type Modified Polyamine Epoxy
Common Usage A multi-purpose resin for fiberglass reinforced mat (65 mils) or mortar/fiberglass reinforced mat (125 mils) secondary containment systems. Protects against chemicals, thermal cycling, impact and abrasion.
Colors 00GR Gray. Color may not be uniform and is not intended to be finish coat—see Topcoats listed below. Note: Epoxies chalk and yellow with age, extended exposure to UV and artificial lighting. Lack of ventilation, incomplete mixing, miscatalyzation or the use of heaters that emit carbon dioxide and carbon monoxide during application and initial stages of curing may cause amine blush, possibly affecting adhesion of subsequent topcoats. Epoxies will stain with extended exposure to certain acids. As a result, darker colors are recommended.
Surfacer/Filler/Patcher Series 215, 218. Note: A repair kit of 201, with Part C fumed silica, is available for small patching/surfacing repairs (reference Technical Bulletin 99-22). For more extensive repairs and additional information, contact your Tnemec representative or Tnemec Technical Services.
Primers Self-priming or Series 201, 208, 241
Topcoats Series 120-5001, 280, 282, 252SC. Note: A saturant coat of 237SC liquids is required over fiberglass mat prior to application of topcoat.
Volume Solids 100% (mixed)
Recommended DFT Primer: 4.0 to 12.0 (100-305 microns) per coat.
Resinous Basecoat: 6.0 to 12.0 mils (150-305 microns).
Mortar/Slurry Basecoat: 60 to 80 mils.
Saturant: 8.0 to 12.0 mils (200-305 microns).
Curing Time
Temperature To Topcoat Place in Service Full Cure
75°F (24°C) 8 to 24 hours 24 hours 5 days
If more than 24 hours have elapsed between coats, the ChemBloc coated surface must be mechanically abraded before topcoating. Note: A 24 hour cure provides for traffic, secondary containment and certain mild chemical exposures. Up to five days cure is required for certain severe chemical exposures. Contact your Tnemec representative or Tnemec Technical Services.
Volatile Organic Compounds Unthinned: 0.25 lbs/gallon (30 grams/litre)
Thinned 10%: 0.89 lbs/gallon (106 grams/litre)
HAPS Unthinned: 0.0 lbs/gal solids
Thinned 10%: 0.7 lbs/gal solids
Theoretical Coverage 1,604 mil sq ft/gal (39.4 m²/L at 25 microns). See APPLICATION for coverage rates.
Number of Components Resin Containment Kit (RCK)–Two: Part A (epoxy) and Part B (amine)
Mortar Containment Kit (MCK)–Three: Parts A (epoxy), B (amine) and C (aggregate)

Chemical Recommended Use - What is this?

The chemical resistance data listed on this website should only be used for general reference purposes. Substrates, temperatures, chemical combinations, and other variables can affect the performance of a coating in chemical exposure. Please contact your local to finalize the most appropriate system for your project.

Click the following button to download a PDF of the list of chemicals below.

*Results are NOT suitable for direct or indirect food contact. Intended use exposure results relate to product's performance and substrate protection capabilities only.


Recommended Use
Chemical Occasional Contact Frequent Contact Secondary Containment Cargo Immersion Immersion Service
Aluminum Chloride 100°F (38°C) 100°F (38°C) 100°F (38°C)
Aluminum Sulfate

Also Known As: Alum

Ammonium Hydroxide
Bromine
Calcium Carbonate 100°F (38°C) 100°F (38°C) 100°F (38°C)
Calcium Hydroxide

Also Known As: Lime Slurry

Calcium Hypochlorite
Calcium Oxide
Carbon Dioxide 100°F (38°C) 100°F (38°C) 100°F (38°C)
Chlorine Dioxide 100°F (38°C) 100°F (38°C) 100°F (38°C)
Citric Acid
Copper Sulfate
Copper Sulfate (dry) 100°F (38°C) 100°F (38°C) 100°F (38°C)
Ethanol

Also Known As: Ethyl Alcohol, Denatured Alcohol

100°F (38°C) 100°F (38°C) 100°F (38°C)
Ferric Chloride 100°F (38°C) 100°F (38°C) 100°F (38°C)
Ferric Sulfate
Hydrochloric Acid
Hydrogen Peroxide
Methanol

Also Known As: Methyl Alcohol

NR NR NR NR NR
Phosphoric Acid
Polyaluminium Chloride 100°F (38°C) 100°F (38°C) 100°F (38°C)
Potassium Permanganate NR NR NR NR NR
Sodium Aluminate 100°F (38°C) 100°F (38°C) 100°F (38°C)
Sodium Bicarbonate 100°F (38°C) 100°F (38°C) 100°F (38°C)
Sodium Bisulfate
Sodium Bisulfite
Sodium Carbonate 100°F (38°C) 100°F (38°C) 100°F (38°C)
Sodium Fluoride 100°F (38°C) 100°F (38°C) 100°F (38°C)
Sodium Hexametaphosphate 100°F (38°C) 100°F (38°C) 100°F (38°C)
Sodium Hydroxide

Also Known As: Caustic Soda

Sodium Hypochlorite

Also Known As: Bleach

Sodium Silicate 100°F (38°C) 100°F (38°C) 100°F (38°C)
Sodium Silicofluoride 100°F (38°C) 100°F (38°C) 100°F (38°C)
Sodium Sulfate
Sodium Sulfite 100°F (38°C) 100°F (38°C) 100°F (38°C)
Sulfur Dioxide (dry) 100°F (38°C) 100°F (38°C) 100°F (38°C)
Sulfur Dioxide (wet) 100°F (38°C) 100°F (38°C) 100°F (38°C)
Sulfuric Acid

Also Known As: Sulphuric Acid

Tetrasodium Pyrophosphate NR NR NR NR NR
*Results are NOT suitable for direct or indirect food contact. Intended use exposure results relate to product's performance and substrate protection capabilities only.
  • Color cards, swatches and fan decks are offered at no charge, by request , for more accurate color selection. Expert custom color matching is also available by contacting your Tnemec Coatings Consultant .
  • Deeptone colors may be more expensive than lighter colors. Please contact your Tnemec Coatings Consultant to verify product/color availability and pricing.
These digital colors should not be used to finalize your color selection. Please read our disclaimer . Use the color swatch tool on the left to request official color swatches.

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The products listed below are not exact equivalents. They are only products that you may consider as alternatives in a general sense. Substrate type, condition, temperatures, surface preparation, primer/topcoat selection and intended use are just a few factors that will affect product selection. Please contact your local Tnemec Coatings Consultant for product recommendations.

This ProductModified Polyamine Epoxy