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All Categories > Industrial Pipe Coatings > CT-370 Chemthane High Build Gloss Polyurethane Enamel Coating > Item # - CT-370

Item # CT-370, CT-370 Chemthane High Build Gloss Polyurethane Enamel Coating

A two component, acrylic aliphatic isocyanate polyurethane coating with excellent gloss and color retention Chemthane CT-370 cures to a very tough, abrasive resistant film with exceptional exterior durability, chalk resistance, color stability, and long term gloss retention. CT-370 has a tile-like finish which is very tough but yet a flexible film. Ideal for use in Industrial, Commercial and Marine applications.

1. High solids
2. Low V.O.C
3. Good chemical and stain resistance
4. Excellent gloss and color retention
5. Non-chalking and non-yellowing
6. A tile-like finish
7. Easy to clean
8. Highly resistant to abrasion and impact
9. Outstanding wearing properties
10. High film build

ColorAvailable in most GCP standard colors and Deep Base and Neutral Base
FinishHigh Gloss
Volume Solids62% ± 2% (white)
Theoretical Coverage (per gallon at 1.0 mil DFT)992 ft²
Recommended Thickness2.0 - 5.0 dry mils per coat, 200 - 496 sq. ft. per gallon
Mixing Ratio4:1 by volume. Mix 4 parts Base (Part A) to 1 part Hardener (Part B)
Induction TimeNone
ThinningSpray - Up to 20% with SU-94 Roll -Up to 10% with SU-93
ApplicationConventional, airless spray, brush or roll
Application Temperature50 to 120 ºF
Clean UpS-74
Dry Service Temperature300 ºF
Packaging1 gal. unit
5 gal. units
V.O.C2.70 LBS/gallon
323 GMS/Liter
Shelf LifeMinimum 1 Year
Pot Life4 - 6 hours at 75 ºF
Recoat Time8 - 48 hours at 75 ºF
Ideal as a top coat for storage tanks, vessels, water towers, oil rigs, structural steel, bridges, equipment, lines and racks, exterior of buildings, etc., in chemical processing plants, pulp and paper mills, sewage and waste water treatment facilities, fertilizer plants, petroleum refineries, electric generating stations, coal handling operations, food processing plants and marine installations to name a few.

Surface Preparation
CT-370 Polyurethane Enamel is a top coat only and is not recommended to be used directly over unprimed surfaces. Apply over appropriate primers or intermediate coats. Surfaces must be free from all oil, grease, dirt, water, or other foreign matter. CT-370 Polyurethane is not recommend for immersion service.

A. Carbon Steel

All surface contamination, such as dirt, dust, grease, oil and other deposits must be removed prior to abrasive blast cleaning. Solvent cleaning as outlined in Steel Structures Painting Council's Specification SSPC-SPI should be used to remove all foreign matter. If previous service has left surface deposits of chemicals, they also must be removed by pressure washing and followed by a thorough water rinsing.

Remove all rust, mill scale, loose paint, and any previous existing coatings by dry abrasive blasting all steel surfaces before applying the coating system.

Recommended primers for the CT-370 are CM-15 Chemical Mastic, PC-280 Epoxy Coating, PC-517 Epoxy Mastic, MCU-100 Aluminum and PC-110 Epoxy Primer. Follow the recommended recoat time per label instructions. In some cases an intermediate coat may need to be applied when a 3 coat system is necessary or desired.

B. Galvanized Aluminum and Non-Ferrous Metals

Degrease and chemically clean surfaces in accordance with SSPC-SP1 Solvent Cleaning Specification. Apply by spray, 1 coat VE-180 Vinyl Wash Primer at 0.5 mils DFT. Allow overnight cure. Then apply one coat of PC-110 or CM-15. Recoat time is 4-6 hours for PC-210 and 8 hours for CM-15 at 75 ºF before applying CT-370 High Build Polyurethane. The surface can also be sweep blasted and primed with CM-15 or MCU-100 Aluminum.

C. Inorganic Zinc

Allow 24 hours cure before recoating Inorganic Zinc. Apply Zinc over "Near-White Blast" (SSPC-SP10) or White Blast (SSPC-SP5.) Apply Zinc at 2 1/2 - 3 mils DFT. After the 24 hours cure time, apply a mist coat of CM-15 or PC-110 Epoxy. Let the mist coat tack and spray a full coat of CM-15 or PC-110 at 2-3 mils dry. Allow 8 hours recoat time at 75 ºF before applying CT-370 High Build Polyurethane.

D. Marginally Prepared Steel Surface

Degrease and chemically clean surfaces in accordance to SSPC-SP1 Solvent Cleaning spec to remove all oils, grease, and other soluble contaminants. If steel is chemically contaminated (e.g. acid, caustic, or salts), high pressure water cleaning at a minimum of 5,000 psi is recommended to remove chemicals. The pH of steel should be tested to insure that surface of steel is between 7.0-8.5 pH.

After the above process has been completed, power tool cleaning is to be done. Power tool clean to remove all mill scale, loose rust, loose paint and other detrimental foreign matter. Apply two coats Gulf Coast Paint’s MCU-100 Aluminum at 2-3 mils DFT. Minimum recoat time for MCU-100 is two (2) hours, maximum recoat time is twenty-four (24) hours at 75 ºF and 50% relative humidity. CM-15 Chemical Mastic or PC-636 low temp. Epoxy may also be used as a primer under the CT-370 High Build Polyurethane on marginally prepared surfaces.

E. Concrete/Masonry Surfaces

New concrete must be cured at least a minimum of twenty-eight (28) days before applying a coating. All laitance, efflorescence, chemical contaminants, grease, oil, and other foreign material must be removed. The prepared surface must be clean, dry, and structurally sound. Accepted methods of surface preparation are dry abrasive blast, wet abrasive blast, vacuum shot blast, high pressure water blast, scarifying, scabbling and acid etch/water rinse.

Voids, cavities, spalled areas, and other structural defects should be trowel-grouted smooth with CF-613 ChemCrete Epoxy Crack Filler or PC-1000 Epoxy Mortar. Rub smooth with a hand grinding stone any burrs or high protruding aggregate left uneven by troweling.

Acceptable primers for the CT-370 Polyurethane are PC-149, PC-155, PC-1702, PC-1703 and PC-1703 Epoxy Concrete Primers. An Epoxy Intermediate coat may be needed if higher film build is necessary. Products such as CM-15, PC-636, PC-280, PC-517 or 100% solids materials such as PC-1803 OR PC-1850 can be used. CT-370 is not designed for forklift and other heavy trafficked areas. Use CT-332 Clear or CT-352 Pigmented Polyester Polyurethane for maximum floor protection.

F. Block Walls

Block walls should be free of salts, soap film, oil, grease, dirt, dust and other contaminants and foreign material that will interfere with adhesion of coating system. The block must be dry and free of moisture.

Apply Gulf Coat Paint's PC-145 Block Filler at a rate of 75-100 square feet per gallon. Use a 3/4” - 1 1/4" roller cover. Apply PC-145 Epoxy in multiple directions for uniform filling of block. Block walls should be evenly and uniformly filled. Allow PC-145 Block Filler to cure for 24-72 hours before applying an Epoxy Intermediate Coat, e.g. PC-280, CM-15, or PC-517.

Mixing Instructions, Application Procedure & Recoat Time
Mixing Instructions
Stir each component to a uniform consistency, using a slow speed explosion proof variable speed drill with a Jiffy mixer. Make sure any pigment settled to the bottom is incorporated. Do not vary proportions. CT- 370 is prepared by mixing 4 parts Base (Part A) to 1 part Hardener (Part B) with the power mixer. CT-370 may be thinned up to 20% with SU-94 for spray applications.

Application Procedure
Best method of application is conventional or airless spray use up to 20% SU-94 Spray Thinner. Flush equipment thoroughly with MEK solvent before using and use a moisture trap on the air supply.

When spraying, use a 50% overlapping Crosshatch pattern to minimize the occurrence of pinholes. Do not apply to surfaces below 50 ºF or above 120 ºF. Do not apply over dew or frost. The surface temperature should be at least 5 ºF above the dew point.

3. Rolling
Thin up to 10% by volume with SU-93 Reducer, depending on temperature. Use a short nap phenolic mohair roller cover. Roll in the same direction always keeping a wet edge. Do not over roll product.

Cure Time
Times may be longer for thickness above 2.5 dry mils. For safety and proper product curing, good ventilation is necessary when painting indoors or in confined areas. Be sure the batch numbers are all the same to provide uniform color. Heaters that emit carbon dioxide and carbon monoxide can cause the coating to yellow.

CT-370 is flammable. Keep away from all sources of ignition during mixing, application and cure. Contains Aliphatic Polyisocyanates, N-Butyl Acetate, Xylene, MEK, Ester Solvent and PM Acetate. The HARDENER (Part B) and mixtures of BASE (Part A) with HARDENER (Part B) can cause eye and skin bums as well as allergic reactions. The use of goggles, fresh air masks or NIOSH approved respirators, protective skin cream and protective clothing is a recommended standard practice when spraying. This product is sold without warranty as to performance expressed or implied. Users are urged to make their own tests to determine the suitability for their particular conditions.

For Professional and Industrial use only.
Keep Away from Children.