Best Stain for Outdoor Shower

We do not know of any exterior wood stains that are white and semi-transparent. You would have to get into a solid stain or semi-solid and that would require custom mixing.

@administrator Valspar Semi-transparent claims to come in white, but that has not gotten good reviews here. Will you suggest a semi-solid on white?

The issue is to get a white color, you will have a custom tinted filming stain that dries on top of the wood and this means it will be prone to peeling. We cannot think of one good exterior stain brand to recommend that is semi-transparent or semi-solid and white in color.