# Best Castor Oil for Soap Making Source: https://soapmakingnest.com/best/best-castor-oil-soap-making Updated: 2026-10-20 Publisher: Soap Making Nest. Our score is an editorial rating out of 10 (fit 35%, features 25%, build 20%, value 20%), not a customer rating. Method: https://soapmakingnest.com/how-we-research#our-score Castor oil is a specialty soap-making oil that boosts and stabilizes lather, creating dense, creamy bubbles in handmade bars. Home soap makers use it in small amounts, often around 5 percent, in cold and hot process recipes to enhance foam without making the bar soft or sticky. It pairs well with coconut and olive oil blends for a balanced, luxurious feel. When choosing castor oil, check the grade, cold-pressed is preferred, purity and clarity, viscosity and freshness, whether it is labeled cosmetic or food grade, and packaging that limits oxidation. This guide compares castor oils that trace smoothly, saponify reliably, and give your soap the rich, stable lather that keeps customers coming back. ## Picks ### 1. Traverse Bay Castor Oil USP Soap Making Supplies 7 lbs Gallon Our score: 8.6/10 (Fit for the job 9/10 · Features and specs 8/10 · Build and materials 8/10 · Value 9/10) Traverse Bay 7 lbs gallon of USP castor oil, a bulk supply for makers adding castor to boost lather in every batch. Pros: - USP grade castor oil is high purity and suits cosmetic use - 7 lbs gallon lasts a long time since recipes use castor sparingly - Castor oil helps stabilize bubbles for a creamier lather Cons: - Gallon is more castor than most hobby makers use in a year - Thick, sticky oil is messy to pour and weigh accurately Details: https://soapmakingnest.com/product/B075VHPF49 ### 2. Soapeauty Cold Pressed Castor Oil 100% Pure USP Grade Hexane Free 32 fl oz Our score: 8.4/10 (Fit for the job 9/10 · Features and specs 8/10 · Build and materials 8/10 · Value 8/10) Soapeauty 32 fl oz cold pressed 100% pure USP grade hexane free castor oil for soap and skincare makers. Pros: - Hexane free USP grade castor suits makers avoiding solvent extraction - Cold pressed oil appeals to natural soap and skincare brands - 32 fl oz bottle balances supply with easy handling Cons: - Thick oil clings to bottle walls, so some is wasted without a spatula - Premium processing claims raise cost over basic castor oil Details: https://soapmakingnest.com/product/B077TQNC9C ### 3. NOW Solutions, Castor Oil, Versatile Skin Care, Multi-Purpose, 16 fl. oz Our score: 8.0/10 (Fit for the job 8/10 · Features and specs 7/10 · Build and materials 8/10 · Value 9/10) NOW Solutions castor oil in a 16 fl oz bottle: pure, expeller-pressed and hexane free, Non-GMO Project Verified. It is sold for skin care, and as a single-ingredient oil it fits the castor portion of a soap recipe. Pros: - Pure castor oil that is expeller-pressed and free of hexane, parabens and gluten per the listing - 16 fl oz bottle suits hobby batches, where castor oil is a minor part of the oil blend - Established brand with GMP-certified manufacturing and Non-GMO Project verification, packaged in the USA Cons: - Marketed for skin care, so the listing gives no soap making guidance or saponification data - 16 fl oz runs out quickly for frequent makers, who will pay less per ounce with quart or gallon jugs Details: https://soapmakingnest.com/product/B0013TM9UQ ### 4. Castor Oil USP 32 oz 1 Quart Jug Safety Sealed Container Soap Making Our score: 7.9/10 (Fit for the job 9/10 · Features and specs 7/10 · Build and materials 7/10 · Value 8/10) A 32 oz 1 Quart jug of USP castor oil in a safety sealed container, a mid-size supply for regular soap makers. Pros: - 1 Quart is a sensible amount given castor is a small recipe share - Safety sealed USP castor oil arrives clean and cosmetic ready - Jug with a pour spout is easier to handle than a big gallon Cons: - Sold in a basic quart jug, so check freshness dates before large batch orders - Castor can speed trace, so recipes must keep it at modest levels Details: https://soapmakingnest.com/product/B01HLDZJB8 ### 5. VINEVIDA Castor Oil Gallon Carrier Oil Undiluted Bulk 8 lbs Our score: 7.8/10 (Fit for the job 8/10 · Features and specs 7/10 · Build and materials 7/10 · Value 9/10) VINEVIDA 8 lbs gallon of undiluted bulk castor carrier oil, an economical stash for frequent castor users. Pros: - 8 lbs gallon lowers cost for makers using castor in every recipe - Undiluted pure castor oil keeps lye calculations straightforward - VINEVIDA is a familiar bulk carrier oil supplier Cons: - Check the grade details listed if you need USP or cold pressed castor oil - Bulky gallon is a lot of castor to use before it ages Details: https://soapmakingnest.com/product/B08N5TNMPF ### 6. US+ 10 oz 100% Pure Castor Oil Cold-Pressed Unrefined Hexane-Free USP Grade Our score: 7.4/10 (Fit for the job 8/10 · Features and specs 7/10 · Build and materials 7/10 · Value 7/10) US+ 10 oz pure cold-pressed unrefined hexane-free USP castor oil, a small natural bottle for occasional soaping. Pros: - Hexane-free cold-pressed castor keeps processing gentle and natural - 10 oz bottle is plenty for makers who soap once in a while - USP grade purity works for soap and leave-on beauty uses Cons: - Unrefined castor may be darker and slightly tint pale soap bars - Small size makes it pricier per ounce than bulk castor jugs Details: https://soapmakingnest.com/product/B09CV925V4 ### 7. Nature's Oil Castor Oil - 1 Gallon (128 Fl Oz) 100% Pure Expeller Pressed, Hexane Free Natural Moisturizer for Hair Growth, Skin, Eyelashes, Eyebrows & Beard - Premium Carrier Oil for Massage Our score: 6.8/10 (Fit for the job 7/10 · Features and specs 6/10 · Build and materials 7/10 · Value 7/10) Nature's Oil Castor Oil is a 1 gallon bottle of 100% pure, expeller pressed, hexane free castor oil, a bulk size for lather boosting in soap recipes. Pros: - Gallon size matches the bulk format of the product it replaces. - Described as hexane free and processed to USP purity standards. - Listed as 100% pure, with no other ingredients named. Cons: - The listing is written around hair and skin care and never mentions soap making. - A gallon is a lot of oil for a hobbyist who uses castor at a small percentage. Details: https://soapmakingnest.com/product/B07KGHPHSG ### 8. Castor Oil Pure Carrier Oil Cold Pressed 4 oz Our score: 6.2/10 (Fit for the job 7/10 · Features and specs 6/10 · Build and materials 6/10 · Value 5/10) A 4 oz bottle of pure cold pressed castor carrier oil, a tiny amount for testing castor in a single soap recipe. Pros: - 4 oz is enough to test castor oil in a small batch or two - Cold pressed castor oil works for soap, hair and skin recipes - Small bottle is easy to store for makers with limited space Cons: - Very expensive per ounce compared with quart or gallon castor oil - No grade listed, so purity is less assured than USP labeled oils Details: https://soapmakingnest.com/product/B01E62Z35Y As an Amazon Associate I earn from qualifying purchases.