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Natural Impasto Medium

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Our Natural Impasto Medium is the perfect material to thicken or extend your oil paint naturally or achieve the impasto effect. This medium is free of toxins and preservatives and uses the same ingredients as the Renaissance Masters.

Natural Impasto Medium is also used to add to our Natural Watercolor Kit to make Natural Gouache Paint.

1 lb. package

Technical Data

Artist-grade Limestone powder

Mix with our Refined Walnut Oil to create a superb impasto medium.

Safety & Quality:
Made in the USA. Free of dairy, nuts, and gluten. Vegan & cruelty-free. Not intended for consumption.

Shipping & returns

Return Policies

We offer full refunds on any defective or damaged products. We also offer full refunds (less shipping costs) on elective returns if the product is in re-sellable condition and the return has been made within 3 months of the purchase.

Shipping Policies

Free Standard Shipping on orders above $100 for U.S. customers.

Orders containing in-stock items are typically processed within 2 business days from when we receive the order during operating hours. If a purchase contains out-of-stock or pre-order items, we will ship the order once ALL items are available and it can be fulfilled completely. Once an order is shipped, you will receive a confirmation email with tracking information; please save this email in case of any issues with your order.

After a package leaves our facility, it becomes the responsibility of the contracted carrier to get it to you. Any issues or problems that arise must be resolved with them directly. For USPS orders in particular, we've be instructed that it is best for the recipient to first speak with their local post office regarding any concerns.

Additionally, you can monitor your shipment or file a claim for lost mail with each of the carriers we use: U.S. Postal ServiceUPS, or FedEx.

We work hard to ensure orders are processed and received as quickly as possible, but unfortunately, we're unable to locate lost or delayed packages. We recognize errors happen and ask for your patience in those circumstances, but we will not ship replacement items or issue refunds until a formal determination is made by the carrier. Please use the resources outlined above to seek resolution if needed.


International Shipping

If you’re ordering from EuropeCanadaAustralia or New Zealand, please click the appropriate link to visit the distributor for your region. We normally ship USPS International for international orders, and the order typically takes 2-3 weeks for delivery. Due to global constraints, shipping times may vary, and additional delays can occur due to customs inspections. Since we never know if a package will be held at customs, any import fees or taxes applied to the delivery must be paid by the recipient.


Can I use it with acrylic paint? 
No, it only works with oil.

Is the limestone powder safe?
Lime is hazardous to use. Limestone is different from Lime. Limestone is basically chalk or calcium carbonate. Completely non-toxic and benign.

One pound bag of the Natural Impasto Medium

Customer Reviews

Based on 4 reviews
Noel H.
Impasto Medium

I have not used it yet but super fast shipping and great customer service. Hope this helps.

Stacy R.
Makes Easy Safe Paint!

With my first order of paint pigments I just made several paints with the Impasto (limestone powder) called for in the Gouache paint recipe. Love the ability to make all-nature non-toxic paints and it will last up to year!! I just ordered 3 more colors matter of fact.

Aja F.
Doesn't get any better than Earth Paints!

The colors are so brilliant, I just made my second order to add on all of the colors that I was missing from the Basic Kit- the Mica Gold, turquoise, brilliant yellows, and the smell is awesome! So excited to keep painting on my professional commissions while it's good for the earth and for the artist is a dream come true! - Aja Lee

Dakota M.
Excellent product

The limestone is finely ground which makes it easy to mix with a palette knife. I use the mixture to build up texture in my oil paintings. The impasto is white when first applied which makes it easy to see during application, whereas the Liquin Impasto is clear & hard to see when it is applied. Plus you can avoid the toxicity of commercially prepared impasto products.

Why Natural Earth Paint

  • SAFE

    Free of heavy metals, solvents, parabens, phthalates, formaldehyde, additives, petroleum-based dyes and nano-particles.


    100% solar powered facility, 100% recycled and biodegradable packaging, and zero-waste shipping option available.


    Proud to be the most innovative eco-business in art supplies. We have a whole line of products that you can’t find anywhere else.


    The highest quality pigments, organic ingredients, and hand-crafted in small batches. Pure earth pigments make the most luminous paint available anywhere.