The Wood Log Soap Mould is the essential piece of equipment for any cold process or hot process soap maker looking to move from individual cavity moulds to producing full loaf batches. A sturdy, open-top wooden loaf mould with a 1.2 litre capacity, it is designed to hold a full batch of cold process soap batter that cures as a solid loaf and is then sliced into individual bars — the most efficient and professional way to produce soap in consistent, uniform bars.
Wood log soap moulds have been the standard in handmade soap making for generations. The wooden construction retains heat during the gel phase of cold process soap making — supporting even, full gel throughout the loaf for a more consistent colour, texture, and cure. Unlike silicone moulds that cool quickly, a wooden mould insulates the soap batter and encourages the saponification heat to distribute evenly from edge to edge, producing bars with uniform appearance and curing behaviour.
Our Wood Log Mould is designed to be used with the silicone liner to ensure clean, easy release of the cured soap loaf. Simply pour your soap batter, allow to cure, lift the silicone liner to unmould, and slice into bars. The 1.2L capacity accommodates a standard 400–500g oil weight recipe — producing approximately 8–10 bars at 100–120g each, depending on your recipe and slice thickness.
Also available separately: Wood Log Mould Dividers — inserts that sit inside the mould before pouring to divide the loaf into pre-formed individual bars. Ideal for intricate swirl designs where you want clean divides between colours or for beginners who want to avoid the need for a soap cutter.
Product Info
Specs
- Product: Wood Log Soap Mould
- Capacity: Approximately 1.2 litres
- Recommended Oil Weight: 400–500g total oils (produces approximately 8–10 bars)
- Approximate Bar Yield: 8–10 bars at 100–120g per bar (varies by recipe water content and slice thickness)
- Construction: Wood (pine/plywood) — heat-retaining for cold process gel phase
- Interior: Open top — with silicone liner
- Type: Loaf / log mould — for sliced bar soap production
- Compatible: Cold process soap, hot process soap, melt and pour soap
- Silicone Liner: included
- Dividers: Available separately — Wood Log Mould Dividers sold individually
- Dimensions: Standard loaf mould proportions — suits standard soap cutter / wire cutter
Benefits
HOW TO USE
Step 1 — Prepare your mould
Line the interior of the wood log mould with a silicone liner or a sheet of greaseproof paper folded to fit snugly against all four sides and the base. This prevents soap from sticking to the wood and makes removal of the cured loaf simple.
Step 2 — Pour your soap batter
Make your cold process soap recipe to light-to-medium trace. Pour the soap batter evenly into the lined mould. Tap the mould gently on your work surface to remove air pockets. Smooth the top surface with a spatula if desired, or create texture with a spoon or skewer.
Step 3 — Insulate and cure
Cover the top of the mould with a piece of cardboard or a flat board, then wrap the entire mould in a towel or blanket. This insulates the soap and encourages full gel phase — where the saponification reaction heats the soap to approximately 70–80°C throughout, producing a translucent gel that results in vibrant colours and even curing. Leave undisturbed for 24–48 hours.
Step 4 — Unmould
After 24–48 hours the soap should be firm enough to unmould. Lift the silicone liner or greaseproof paper to remove the loaf in one piece. If the soap is still soft or sticky, leave in the mould for another 24 hours.
Step 5 — Slice and cure
Place the loaf on a cutting board and slice into individual bars using a sharp knife, soap cutter, or wire cutter. A standard 1.2L loaf produces approximately 8–10 bars at 2–2.5cm thick. Stand the bars on their sides with space between them and leave to cure in a cool, dry, well-ventilated location for a minimum of 4–6 weeks before use.
KEY BENEFITS
- Wooden construction retains insulation heat during the cold process gel phase — promotes even, full gel throughout the loaf for consistent colour, texture, and cure from edge to edge
- 1.2L capacity is the perfect size for a standard hobby to small-production batch — accommodates 400–500g oil weight recipes
- Produces uniform, professional-looking bars every time — straight sides, even thickness, clean cuts
- More efficient than individual cavity moulds — pour one batch, slice multiple bars; far faster for regular soap production
- Reusable indefinitely with proper care and use of a liner
- Versatile — suitable for cold process, hot process, and melt and pour soap
- Compatible with Wood Log Mould Dividers (sold separately) for pre-divided bar formats and intricate swirl or layered designs
- Straightforward to use — no special skills required; the standard mould format taught in all beginner soap making guides and books
- Pairs perfectly with your existing soap making ingredient range — designed for standard 400–500g oil batches
TIPS FOR BEST RESULTS
Always use a liner: Never pour soap batter directly into an unlined wooden mould. Raw soap batter (before saponification is complete) is highly alkaline and will damage the wood, may stick permanently, and makes removal very difficult. Always line with a silicone liner or greaseproof paper.
Encourage gel phase for vivid colours: Cover and insulate the mould immediately after pouring to promote a full, even gel phase. Gelled soap has richer, more vibrant colours than ungelled soap — particularly important for soaps coloured with micas, oxides, or natural botanicals.
Prevent gel phase for white soap: If you want a bright white uncoloured soap (such as a bastille or lard soap), place the mould in the refrigerator or freezer for 24 hours after pouring to prevent gel phase. Remove and allow to complete saponification at room temperature before unmoulding.
Let it harden fully before slicing: Cold process soap needs 24–48 hours minimum before unmoulding and slicing. If the soap is still soft or sticky at 24 hours, give it another day. Slicing too early produces bars with rough, torn edges rather than clean cuts.
Clean dry storage: After use, remove any soap residue from the interior while it is still fresh, allow the mould to dry completely, and store in a dry location. Avoid soaking in water — prolonged water exposure will warp and damage the wood.
TYPICAL APPLICATIONS
- Cold process soap loaves
- Hot process soap loaves
- Melt and pour soap loaves
- Layered soap designs
- Swirl soap designs (with or without dividers)
- Embedded soap designs
- Salt bar loaves
- Shampoo bar loaves
- Conditioning bar loaves
Product Safety
- General Handling: Store in dry place; clean wood with damp cloth, air dry.
- Lye Compatibility: Wood and silicone safe for cold-process (no prolonged soaking).
- Silicone Liner: Food-grade – flexible and heat-resistant.
- Children: Supervise use – mould has edges.
- Environmental: Natural wood and silicone – reusable and long-lasting.
- First Aid: Standard for tools – no hazards.
Shipping
Collections from Springvale: Please allow 24 hours for all collection in store. If same day pickup is required, please contact us to discuss.
Shipping: We ship Australia Wide
FAQs
Questions
Is the wood log mould safe for cold-process soap?
Yes – natural wood and food-safe silicone fully compatible with lye.
What's the capacity and batch size?
1.2L volume – fits ~1kg+ CP batch for standard loaves.
How to unmould without sticking?
Remove from wood box first, then peel silicone liner from soap.
Can it be used with dividers?
Yes – optional dividers available for clean layered or multi-colour designs. Click here to purchase.
How to clean the mould?
Wipe wood with damp cloth; wash silicone with soap and water – air dry.
Suitable for melt & pour?
Yes – line with silicone for flawless release and detail.
How many bars per loaf?
Typically 8-10 standard bars depending on cut thickness.
Why wood over full silicone?
Wood provides rigidity for straight edges; silicone ensures easy release.
YOU MAY ALSO NEED
- Wood Log Mould Dividers — pre-divide your loaf into individual bars before pouring; ideal for swirl, layered, and multi-colour designs
- Caustic Soda (Sodium Hydroxide) — essential for cold process soap making
- Castor Oil (Hexane Free) — boosts lather and bubbles in cold process soap recipes
- 100% Australian Tallow — premium base fat for hard, long-lasting cold process soap bars
- Shea Butter (Refined & Organic) — luxury addition to cold process soap recipes for extra conditioning
- Fragrance Oils — scent your cold process soap loaves
- Essential Oils Collection — natural scenting for cold process soap
- Colourants — Micas — cosmetic grade mica powders for coloured soap designs
- A Guide to Soapmaking – Digital PDF — includes loaf mould techniques, gel phase guidance, and cold process recipes for beginners
Great service.
Happy with this purchase. Great size very light makes roughly 10 soap bars.