Surface Preparation is typically the most important step when applying high performance coating systems. Even so, abrasive blasting is often either not feasible or entirely impossible due to site access or environmental constraints. In such cases, surface tolerant products, like Tnemec’s ProTuff Series 132, Series 133 , Series 135 or Series 138 can be specified. These advanced formulation products were designed for application over tightly adhered corrosion and marginally prepared or previously coated steel. These materials can also be used as a primer or intermediate coat under weatherable finishes. Tnemec Company Inc.’s ProTuff epoxies can be applied at low-temperatures, below dew point conditions and even on damp surfaces. Their ability to adhere to substrates with less than thorough surface preparation protocols like SSPC-SP2 Hand Tool or SSPC-SP3 Power Tool makes these coating types extremely useful in mitigating the high cost and environmental impact of containment and blasting operations.
Benefits of Surface Tolerant Epoxy Mastic Coatings:
- Reduced downtime and labor cost
- Apply over old coatings & tightly bonded rust
- Low-temperature cure
- Damp-tolerant application capabilities
- Corrosion and chemical resistance
- Easy and versatile application – brush, roll or spray
- High-build capabilities
Of course, the practice of overcoating aged systems brings its own set of inherent risks. It is critical when giving consideration to the use of surface tolerant coatings for a specifier to be aware of environmental tolerances and understand the condition and adhesion values of the existing coating system. Failing to fully understand the existing conditions and the host system’s ability to accept an overcoat can lead to significant problems, including wholesale delamination of the existing and newly applied materials. Contact your local High Performance Coating Consultant to learn more about how to determine whether an existing coating is a candidate for an overcoat application.
In short, surface-tolerant epoxy mastic coatings can offer Owners, Engineers, Architects and applicators enhanced durability and corrosion protection for a variety of previously coated metal surfaces, making them versatile for maintenance in any environment. From pipe galleries to power plants, surface-tolerant epoxy coatings from Tnemec Company Inc. have a history of providing customers with reliable, time-tested protection, whether applied as stand-alone systems or with high-performance topcoats. In the end, these advanced epoxy products will serve to extend maintenance cycles and keep your facilities on-line while protecting your valuable assets.
CONTACT US for assistance in selecting the proper surface tolerant primer and for help in evaluating the existing coatings and conditions on your project.
Check out our related resources on this topic:
The Importance of Surface Preparation with High Performance Coatings
Surface Preparation of Ductile Iron Pipe & Fittings
Ultimate Guide to Surface Tolerant Epoxies
Shop Priming
Dissimilar Metal Corrosion
Determine What Coatings to Use Where
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