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Tips for Cold-Weather Application with Ecodur 201

We’ve already given you three reasons why you should coat in the winter time. But now we want to share some tips with you on how to achieve the maximum use from cold-weather application using Ecodur 201.

Start Up:
To apply Ecodur 201 coating in cold weather, gradually increase the amount of hot sauce (DOTL) you use to get comfortable with the faster curing times. The increased DOTL makes the coating process more operationally challenging and requires the applicator to increase the frequency of gun maintenance.
And always check to make sure the surface is completely dry before spraying or the coating will not adhere properly to the surface. Also, make sure the dew point temperature is at least 5°C or 10°F below the substrate temperature.
Ecodur 201 comes in two parts. And it’s important that materials for both parts are kept at proper storage temperature before any coating takes place.
Ecodur 201S Part A:

  • Storage Temperature: No lower than 32°F (0°C).
  • Storage Recommendation: Store the product upside down for easier mixing when used. Flip it right-side up several days before use.

Ecodur 201S Part B:

  • Storage Temperature: Between 75° to 105°F (24° to 41°C). Note that the material can gel or crystalize if stored at colder temperatures.
  • Moisture: The material must be moisture-free. And ensure the container is closed at all times because the product can absorb moisture from the air over time. If moisture attaches to the material, not only is it contaminated, it also produces CO2 gas which may cause pressure build-up inside the sealed container.

Always allow extra time for the material and the equipment to heat up before use. And remember to never rest the hose on the cold ground or snow because it can affect the temperature of the heated material and the hose can melt the snow and pull debris into the tank. Instead, rest the hose on dry wood to keep the hose off the ground.
Use the minimum amount of hose required for the job (preferably no longer than 150ft). The longer the hose length, the more difficult it becomes to maintain proper ratios during spraying operations. When using a longer hose, care must be taken to manage the off-ratio product when spraying first begins. A longer period of time will be needed to manage the off-ratio product than usual.
Unroll the entire hose during the start-up and spraying operation. If the heated hose is left on the hose rack there is a chance that it can catch on fire.
Spraying Application:
Get it right on the first spray pass. The hot coating material will potentially cause condensation on the top layer. This layer needs to completely dry before a second coating (if necessary) is applied.
Don’t forget to check the dew point, ambient, substrate temperature, and RH hourly. And make sure the surface is dry.

Manual Application:
Manual coating kits need to be kept at room temperature up until the mixing and application process.
Heating blankets can be used to warm the coating material. Take extra caution to not overheat the material.
Note that when applying the prepared Ecodur 201 coating material onto a cold steel surface, the viscosity of the material will change from a light cake batter to a thick pudding texture.
In the pudding texture-like condition, it can be challenging to apply and roll the coating material onto the surfaces and up the tank wall. During cold weather application, pour only one third of the prepared material onto the surfaces at a time.
If possible, keep the Ecodur spray rig stored in a climate-controlled facility when not in use.

TNphoto Tatsuya Nakagawa
Tatsuya Nakagawa is the VP of Marketing and co-founder of Castagra Products, a storage tank and wastewater coatings manufacturing company that is highly acclaimed for its sustainable coatings, cold weather tank and secondary containment coating applications, and its durable frac tank coatings. Castagra is used by the world’s top oil and gas field services companies.