Orthophosphoric Acid: chemical resistance of ASP floors
How each ASP epoxy and polyurethane flooring product performed when fully immersed in orthophosphoric acid, from ASP's chemical resistance guides (December 2022).
Summary85% at 20°C: no product rated excellent; not resistant: ASP-primeStd, ASP-coat500, ASP-coat1000, ASP-coatSL, ASP-screedPTS, ASP-screedSTB and ASP-coatWBE.
85% at 20–25°C: excellent for ASP-creteSL, ASP-creteMD, ASP-creteRT and ASP-creteVS.
| Product | 85% at 20°C | 85% at 20–25°C |
|---|---|---|
| Epoxy products | ||
| ASP-primeStd | – | |
| ASP-primeDamp | – | |
| ASP-coat500 | – | |
| ASP-coat1000 | – | |
| ASP-coatSL | – | |
| ASP-screedHTS | – | |
| ASP-screedPTS | – | |
| ASP-screedSTB | – | |
| ASP-repair | – | – |
| ASP-epoxyCove | – | – |
| ASP-epoxyGrout | – | – |
| ASP-coatWBE | – | |
| Polyurethane products | ||
| ASP-creteSL | – | |
| ASP-creteMD | – | |
| ASP-creteRT | – | |
| ASP-creteVS | – | |
| ASP-creteCoat | – | |
| ASP-uvCoat | – | |
| ASP-coatPU | – | |
| ASP-trafficID | – | |
Ratings come from 30 × 30 mm samples cast at each product's prescribed thickness, cured for 7 days and fully submerged at 20–25°C. On a real floor, a spill only touches the surface, so performance is usually better. Elevated temperatures accelerate chemical attack. How to read these ratings.
Questions about orthophosphoric acid
Which ASP floors resist orthophosphoric acid (85% at 20°C)?
Not resistant (0): ASP-primeStd, ASP-coat500, ASP-coat1000, ASP-coatSL, ASP-screedPTS, ASP-screedSTB and ASP-coatWBE.
Which ASP floors resist orthophosphoric acid (85% at 20–25°C)?
Rated 5 (excellent, no significant deterioration after long-term contact): ASP-creteSL, ASP-creteMD, ASP-creteRT and ASP-creteVS.
Is epoxy flooring resistant to orthophosphoric acid?
ASP's epoxy products are not rated excellent for orthophosphoric acid at the tested conditions. Check the table for shorter-term ratings, or consider the polyurethane or vinyl ester ranges.
Is polyurethane flooring resistant to orthophosphoric acid?
Some ASP polyurethane systems are rated excellent for orthophosphoric acid at 85% at 20–25°C.