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polyurea coating (on styrofoam), spray for fire protection DIN 4102 class B1

polyurea coating (on styrofoam), spray for fire protection DIN 4102 class B1

polyurea coating (on styrofoam), spray for fire protection DIN 4102 class B1

(OP)
Dear,

It's my first time here on the forum, so I'm hoping I'm posting this in the right place.
We have constructed an outdoor themed building in an amusement park in Germany, out of Polyurea coated styrofoam. The polyruea coating has a fire rating of DIN4102 class B2, meaning it is as combustible as wood. We need to find a transparant spray to render this building (and thus this polyurea coating) fire retardant according to DIN4102 class B1 (low combustibility).

I've searched and searched and can't find a product that can help me. These product are either not applicable for outside, either only applicable on wood and similar construction materials, not on coatings, or not available in spray form, but only in resin form, which will ruin the look and feel of our themes building.

Are there any experts here who know more on this subject?

Thank you very much in advance.

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