Linseed oil + jute + wood flour — invented in 1855, still the cleanest resilient flooring on the market.

This material screens clear across all seven independent toxicology authorities we use on every project.
Natural linoleum is a wholly different product from vinyl flooring despite the visual similarity. It's made from oxidized linseed oil (from flax seed) blended with pine rosin, ground cork, wood flour, limestone, mineral pigments, and a jute backing. The mixture is calendered onto the backing and cured over weeks to develop its characteristic durability. The whole formulation is plant-mineral — no PVC, no phthalate plasticizers, no chlorine chemistry. Properly maintained natural linoleum lasts 40+ years and biodegrades at end of life. The initial off-gas is linseed-oil curing odor, which fades over weeks.

Severity scored 0–10 against the same 10 hazard endpoints we use for the chemical families on the avoid list. Every score is 1–2 — essentially no signal across every endpoint.
Listed alphabetically. Where in a home this material earns its keep.
Natural Linoleum is part of how we build a sustainable home that is also a comfortable one. Our wall and roof assemblies are modeled in PHPP before anything is ordered, so insulation, cladding and finish all have to perform together.
If you are planning a new house or a deep remodel and you want this level of material control, that is the whole job we do. Earth Bound Homes builds in Palo Alto, Menlo Park, San Mateo County and across the San Francisco Bay Area.