Chemical Mastic CM-15 High Build Epoxy Mastic Coatings

A two-component, high solids, chemical resistant amine cured epoxy mastic. Chemical Mastic CM-15 is specially modified with a proprietary blend of selective resins, wetting agents, penetrants, and rust inhibitors to provide excellent adhesion and protection of sound, rusty steel surfaces, and to upgrade old, deteriorated coatings. Ideal as a coating system over marginal or poorly prepared surfaces where blasting is impractical or prohibited. Recommended as a high build primer under a wide variety of topcoats.

We have other products and systems of which we can Engineer to fit your application. Give us a call at 801-977-0508!

1. Excellent adhesion to tight rust.
2. USDA Approved.
3. A high build primer or finish coat.
4. Out performs standard epoxies.
5. Excellent against “undercutting”.
6. Easy to apply, self-priming on steel.
7. Excellent build to protect sharp edges
8. Tight film, low permeability
9. Good chemical, abrasion and impact resistance
10. Available in many colors
11. CM-15 Primer incorporates Micaous Iron Oxide as the rust inhibitor pigment.
ColorStandard Industrial Colors and Aluminum.
FinishGloss – 85 5%
Volume Solids82 3%
Theoretical Coverage (per gallon at 1.0 DFT.)1315 ft
Recommended Thickness5.0 – 7.0 dry mils at 188 – 263 sq. ft. per gal.
Mixing Ratio4:1 by volume. Mix 4 parts Base (Part A) to 1 part Hardener (Part B)
Induction TimeNone
Pot Life3 hours at 75 F when reduced with S-74
ThinningS-74 Reducer
ApplicationSpray, brush or roller.
Application Temperature45 to 120 F
Maximum Dry Service Temperature50 F
Recoat Time8 hours at 75 F (5 dry mils)
Clean UpS-74
Packaging1 gal. unit
5 gal. units
V.O.C. (white)1.34 LBS/gallon
161 GMS/Liter
Min. Shelf Life1 Year
Chemical Mastic CM-15 is formulated for use over tightly adherent rusty steel and previously painted surfaces limited to hand or power tool cleaning. Although blasting of steel is the best method of preparation, Chemical Mastic CM=15 will provide excellent adhesion and protection to non-blasted steel surfaces in any industrial facility. Specific areas include structural steel, tanks, vessels, water towers, equipment, lines and racks, metal buildings, fences, catwalks, bridges, railings, fire escapes, 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, marine installations, etc. Chemical Mastic CM-15 can be used as a high performance primer under epoxy, polyurethane, vinyl, acrylic, alkyd topcoating to upgrade corrosion resistance in severe chemical exposures.
Surface Preparation
Remove all dirt, grease, oil, soil, chemical contaminants, and other matter before any mechanical preparation. High pressure water cleaning is recommended. Prepare and paint only clean surfaces in accordance with Steel Structures Painting Council (SSPC) or National Association of Corrosion Engineers (N.A.C.E.) specifications.

1. Steel
a. Sand Blast – Best
Sand Blast to a “Commercial” (SSPC-SP6-63) or “Near White” metal finish. Prime same day, if possible.

b. Power Tool Clean
Follow instructions as outlined in SSPC-SP3-63 specification

c. Hand Cleaning
Follow instructions as outlined in SSPC-SP2-63 specification.

2. Galvanized Steel
a. New
Brush blast per SSPC-SP7, or prime with VE-180 Vinyl Wash Primer per label instructions.

b. Old, Weathered, or Rusty
Remove all oil, grease, dirt, and other foreign matter. Surface should be reasonable clean, dry and free of contaminants. Remove all loose rust, etc., as outlined above under “steel”.

3. Previously Painted Surfaces
Remove all loose, peeling, or blistered paint, and any other surface contaminants. Make sure surface is sound and dry. Apply a test patch of CM-15 over the existing coating to insure compatibility.

4. Concrete
All new concrete must be cured at least 28 days. Do not use form release agents surface hardeners, or curing compounds.

All concrete should be prepared in accordance to the American Concrete Institute (ACI), Steel Structures Painting Council (SSPC), and National Association of Corrosion Engineers (NACE) concrete specifications. Remove all dirt, dust, oil, grease, laitance, efflorescence, loose or unsound concrete, and any chemical contaminants by such methods as high pressure water blast, wet or dry abrasive blast, vacuum shot blast, acid etching and other accepted surface preparation methods. A combination of these methods is normally used.

For on-grade concrete slabs check that a moisture vapor barrier film has been used. Testing may be necessary. Check for the presence of hardeners or residual forming membrane curing agents. Repair all cracks, spalled concrete, voids and expansion joints.

Coating System
The properly sound, cleaned concrete must be primed first with either PC-149, PC-155, PC-1702, or PC-1703 Epoxy Concrete Primer per label instruction. Two coats of CM-15 Epoxy at approximately 5-7 mils dry per coat is recommended for light traffic areas. For heavy forklift and high abrasion areas, CT-352 Polyester Polyurethane Coating at 2-3 mils dry film thickness is recommended as the top coat over one coat of CM-15 Epoxy.
Mixing Instructions, Application Procedure & Recoat Time
Mixing Instructions
Stir each component to a uniform consistency, using a slow speed variable speed explosion proof drill with a Jiffy Mixer. Do not mix by hand. Make sure any pigment settled to the bottom is incorporated. Do not vary proportions. Chemical Mastic CM-15 is prepared by mixing 4 parts base (Part A) to 1 part Hardener (Part B) with a power mixer. CM-15 may be thinned up to 10% by volume for airless spray, and up to 20% by volume for conventional spray. When rolling, thin 10-20% by volume.Application Procedure
When spraying, use a 50% overlapping Crosshatch pattern to minimize the occurrence of pinholes. Do not apply to surfaces below 45 F or above 120 F. Do not apply over dew or frost. The surface should be dry and at least 5 F above the dew point.

Recoat Time
Times may be longer for thickness above 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. Epoxy coatings may yellow or darken during application and after final cure. This will affect the color but will have no effect on the performance of the product. Heaters that emit carbon dioxide and car bon monoxide can cause the coating to yellow. For maximum interior gloss and color retention apply 1 top coat of PC-270 Polyester Epoxy. For maximum exterior gloss and color retention apply a topcoat of CT-370 polyurethane.

CM-15 is flammable. Keep away from all sources of ignition during mixing, application and cure CM-15 Hardener is corrosive. The Hardener and Base can cause eye and skin burns as well as allergic reactions. Use goggles, fresh air masks or NIOSH approved respirators, protective skin cream and protective clothing. 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 then- particular conditions.

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

Request More Information