Can acrylic be used in a steam bath?
The MSDS for Lucite XL refers to flat sheets and film. 104 F / 40 C . Higher temp and humidity can affect the film adhesion, long term storage conditions
Maximum continuous service temp for Lucite XL is 80 C / 175 F
This is a bathtub or shower pan so that it will have FRP backing.
Bathtubs made from Lucite XL are known to be used in steam rooms.
However, the steam jet mustn't directly contact the bathtub surface.
That will cause long-term environmental stress cracking (ESG) of the acrylic.
We suggest the bathtub should not be heated above 60 C / 140 F