depends on the brand, some have different materials cosntruction and moisture resistance.

This one brand i always pakai particle board. Waste part from project, i left it under the sun and rain for months. Suprisingly after all those tortures, the particle board masih ok, no warping, moisture expansion or anything, but the HPL glue lepas, but that is minor thing can reglue.

Back back then, some of the HPL counter cannot tahan, but this is under extreme dampness, so...kalau pakai, its nice, cheap, boleh replace, but be careful of water, TRY to prevent la, jgn flood it.