Description
DTM Epoxy Mastic 9100 Series - Rust-Oleum
Product description
Description:
Are you looking for a robust, durable, and versatile epoxy solution to protect metal or concrete in demanding conditions? Rust-Oleum 9100 Series epoxy mastic is designed to perform where other products fail. This high-performance industrial coating adheres directly to metal—even rusted surfaces—without a primer, and resists everything: chemicals, abrasion, moisture, immersion, and impact.
It is intended for those who want effective protection without complex procedures. Easy to apply by roller, brush, or spray, it covers between 250 and 500 sq. ft. per 2-gallon kit. Its 1:1 mixing ratio simplifies preparation, and its wide range of specialized activators allows you to adapt it to your project: fast-drying, low-temperature, or immersion use (fresh or salt water).
Ideal for metal structures, concrete floors, exposed mechanical parts, or industrial surfaces, this epoxy ensures a resistant, durable, and waterproof finish. It dries quickly, forms a rigid protective film, and can even be applied in non-ideal conditions (down to 5°C with the appropriate activator).
With Rust-Oleum 9100, you are investing in a proven system backed by a 2-year rust-proof guarantee. Whether for a workshop, warehouse, garage, outdoor structure, or tank, this product offers the peace of mind of a professional, resistant, and durable coating.
Features
- Direct-to-Metal (DTM) application, even on rusted surfaces
- Excellent resistance to solvents, chemicals, impacts, and abrasion
- Self-priming formula, no primer required
- Versatile: suitable for metal, concrete, and masonry surfaces
- Available with several specialized activators (immersion, low temperature, fast drying)
- 2-year rust-proof guarantee with proper preparation
ACTIVATORS:
For
standard application
Standard application on surfaces between 10 – 38°C
Activator for
immersion projects
For application on metal or concrete that will be immersed in water (salt or fresh) where water temperature does
not exceed 52°C
Slightly lower gloss than the standard activator
Not recommended for potable water tanks
Low-temperature activator
Application on surfaces or at temperatures between 5 – 15°C
Fast-drying activator
Faster cure for quicker return to service
Application on surfaces between
10 – 38°C
Slightly lower gloss than the standard activator
Available colors
Available colors
* Colors displayed may vary depending on screen, wood grain, texture, porosity, as well as preparation and application method. We encourage you to test on a small surface beforehand to ensure the accuracy of the desired color.
Drying time
DRYING TIMES
For
standard application
Drying time between coats:
16 h
Drying time before handling:
6 h – 12 h
Activator for
immersion projects
Drying time between coats:
16 h
Drying time before handling:
8 h – 14 h
Low-temperature activator
Drying time between coats:
24 h
Drying time before handling:
22 h to 26 h
Fast-drying activator
Drying time between coats:
4 h
Drying time before handling:
5 h
FAQ – Frequently asked questions
Q: Can I apply this product directly to rusted metal?
Yes. The 9100 Series is designed for Direct-to-Metal (DTM) application, including well-prepared rusted surfaces.
Q: Is this product suitable for concrete surfaces?
Yes. It is compatible with concrete, masonry, and metals.
Q: Can I use it for an immersion project (tank, basin, etc.)?
Yes, by choosing the immersion activator, designed for submerged surfaces.
Q: What is the minimum application temperature?
With the low-temperature activator, you can apply the product starting at 5°C.
Q: How long does it take to dry?
Drying time varies depending on the chosen activator. The fast-drying option allows for a quicker return to service.
Q: Does this product protect against rust?
Yes. It offers a 2-year rust-proof guarantee, provided the surface is properly prepared.















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