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Advantages of Castagra’s Ecodur over Polyurea & Polyurethane Coatings

Beauty may only be skin deep, but as we all know, skin does not have to be overly thick to protect.

The same goes for industrial coatings. There’s a balance. Too thick and they can be unnecessarily expensive without adding additional protection.

Generally, the main difference with the polyurea types and Castagra’s is polyurea ends up often having a minimum application thickness of 40 mils which is twice Castagra’s and more often than not often it can be 60 mm plus.

Castagra’s Ecodur also has superior adhesion between 98 and 100%. Over time this can be telling as many application surfaces such as tanks are subject to extremes of climate conditions which have metal walls contracting and expanding.

Ecodur is ANSI/NSF 61 approved. Few polyurea coatings are NSF-61 (drinking water) certified due to the peculiar urea chemistry. They are also harder to self level or flow out smoothly while being sprayed.

Chemical resistance of polyureas and polyurethanes, while good in many basic applications simply cannot match the broad range of exotic chemicals now being encountered, particularly in the fracking industries where coating life can be measured in a few months, or even days or hours in extreme cases.

Polyureas and polyurethane coatings have significantly inferior fire protective qualities. On heating Castagra Ecodur gives off fire-suppressing water vapor and carbon dioxide which can allow its protection to be contributing factor to fire suppression far longer (see here).

Polyurethanes however, in decomposition from fire can be explosive and produce mainly poisonous carbon monoxide, trace nitrogen oxides and deadly hydrogen cyanide gases. Even when containing fire retardants, the fiercely toxic gases are still emitted.

Another practical consideration is repair work. It is often advised not to try to patch over polyurethane with it being better to remove and replace the entire coating. Due to coating thickness of polyurethanes removal can be very difficult indeed with extra heavy duty sand blasting material being required. Ecodur bonds completely to the original coating at the molecular level.

The polyureas have too much flexibility (toward 200% elongation versus Castagra’s 20 to 100%). Too much elasticity seems to correlate with increased tendency to form large blisters that inevitably leave the container or pipe surface to be more vulnerable.

Castagra CEO, Peter Roosen, observed “Our coatings stand out from the polyurethanes and polyurea coatings by having the considerable advantages of being non-toxic, biologically inert and highly fire retardant without the need for retardant additives that can create large volumes of seriously poisonous gases when exposed to fire.

“They also match or exceed these conventional coatings in application capabilities in extreme weather applications as experienced in oil and gas fields while being cheaper and easier to maintain when and if damage has to be repaired.”


Ecodur is not petroleum based

Ecodur does not release isocyanates

Ecodur waste is 100% recyclable

Ecodur is made of natural products – castor oil and gypsum

Ecodur is considerably cheaper

Ecodur has a far wider resistance range to chemicals

Ecodur outperforms in repair of existing Ecodur coating with 100% bond

Ecodur has better thickness range

Ecodur is easier to apply for the applicator

Ecodur is self-extinguishing, releasing harmless water vapor

Ecodur is not attacked by fungus

Ecodur matches or exceeds longevity while outperforming overall