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Tordera railway bridge Impermax Polyurea H Flex
Engineer notes. Not a blog. Railway bridge over the Tordera. Impermax Polyurea H Flex (hot-spray hybrid polyurea) is the named membrane.
Rayston Epoxy 100 (solvent-free epoxy primer) is the recorded primer. A geotextile is the recorded protection before ballast. Therefore the specifier writes the commercial name and the chemical type in the same sentence. Ballast is not the waterproofing.
The recorded build
First, name the structural deck. Rayston Epoxy 100 (solvent-free epoxy primer) is the recorded preparation. Then name Impermax Polyurea H Flex (hot-spray hybrid polyurea). Catalogue 2026 lists it for bridge and viaduct decks. The job record names it as a continuous elastomeric layer with crack-bridging classified as B.4.2 dynamic / A5 static.
After that, a geotextile is adhered over the membrane. Railway ballast is then laid as the track base. Do not leave the polyurea as the wearing surface under ballast. Also, do not invent a kilogram rate. Read consumption from the current sheet, then the calculator.
How to specify Impermax Polyurea H Flex on a railway deck
Name primer, hot-spray hybrid polyurea, geotextile and ballast as separate lines. Keep crack-bridging on the current TDS; do not invent a class. A spray photograph is not the protection clause.
See bridge decks, viaduct decks and products. Documents stay on /documents/.
Official project: kryptonchemical.com — railway bridge over the Tordera.
Outbound reference: EOTA.
B.4.2 / A5 is the class written on the job record. Confirm it on the current sheet before the specification is frozen.
These notes do not replace the current TDS, SDS or a written specification. For pack sizes, mix ratio and kg/m², read the current sheet, then the calculator.
