The large, angular pores on the underside of the cap are coloured pallid to yellowish at first, but become darker with maturity.

Young specimens bear a whitish partial veil which soon shreds, sometimes leaving fragments on the cap edge.

[2] The flesh is whitish, staining bluish,[2] very soft and has a mild or non-distinct taste.

[4][5] Suillus viscidus forms an ectomycorrhizal association with larch (Larix) specifically, and its distribution is thus limited by the range of the host tree.

[4] Fruiting bodies are found in groups among grass under larch, from summer to autumn.