How to Make Concrete Candles: A DIY Guide
- Astrid van Essen
- Mar 24
- 5 min read
When casting concrete, I try to be as efficient and precise as possible, but sometimes you end up with leftovers. Chucking them would be a shame. I found a better option: using the excess concrete to make beautiful, minimalist candles.
They’re perfect for gifting or adding a touch of industrial chic to your space. Here's how you can make your DIY concrete candles at home.
What You’ll Need:
Concrete mix: Any leftover mix or ready-to-use quick-set concrete
Candle wax: Soy wax, beeswax, or paraffin all work
Wicks: Choose the right size for your container diameter
Old containers or cups: I love reusing paper coffee cups (like the GAIL's one in the photos), yoghurt pots, or anything with a nice shape
Mixing bowl and spoon (for concrete)
Gloves and Mask: always wear gloves and a mask when working with concrete
Double boiler or microwave-safe jug (for melting wax)
Glue gun or superglue (to secure wicks)
Optional: Essential oils or candle dyes for customisation
Step 1: Prepare Your Moulds
Clean your chosen containers and ensure they’re dry. If you’re using paper cups or yoghurt pots, there’s no need to line them—they can be peeled away later. For reusable containers, you may apply a bit of cooking oil, vaseline or a non-stick spray to help release.
Step 2: Mix and Pour the Concrete
Mix your concrete according to the instructions—aim for a thick, pourable consistency. Fill each container one-third to halfway full, depending on your aesthetic preference. Gently tap the containers on the work surface to release any air bubbles.
Tip: To help the wax adhere better and avoid sliding off the concrete base, lightly roughen the top surface of the cured concrete with sandpaper before pouring the wax.
Step 3: Set the Wick
Once the concrete has started to set but is still slightly wet (usually after 15–20 minutes), press your wick base gently into the centre; if the concrete is at the right stage, it should hold upright without support. This ensures your wick is embedded and stable. Alternatively, you can glue the wick onto the concrete base when dry.
Tip: If the wick leans, use a peg or stick balanced across the container to hold it in place until the concrete fully cures.
Step 4: Let the Concrete Cure
Allow the concrete to cure fully – this usually takes 24–48 hours, depending on the product. Avoid moving the containers during this time to prevent cracks or uneven bases.
Tip: Place your concrete in a warm, dry space to help it cure evenly and prevent surface moisture marks.
Step 5: Melt the Wax
Once your concrete base is set and fully cured, it’s time to prepare the wax. Use a double boiler or a microwave-safe jug to melt your candle wax slowly and evenly. Stir occasionally and monitor the temperature with a thermometer – aim for 70–80°C (160–175°F) for most waxes.
Tip: Avoid overheating the wax as it can discolour and affect the scent if essential oils are used.
Step 6: Add Scent or Colour (Optional)
Add essential oils or candle-safe dyes if desired when the wax has fully melted. Stir well to ensure even distribution. Depending on the wax type, a 6–10% fragrance load is usually recommended for scent.
Tip: Add fragrance once the wax has cooled slightly (around 65°C) to prevent it from burning off.
Step 7: Pour the Wax
Carefully pour the wax into your containers holding the concrete, ensuring the wick remains upright and centred. Leave a small gap at the top to prevent overflow.
Tip: Pour slowly to avoid air bubbles and splashes. If the wick moves, re-centre it with a peg or skewer while the wax is still liquid.
Step 8: Let the Wax Set
Leave your candles to cool and set completely. This usually takes a few hours at room temperature. Avoid placing them in the fridge, as this can cause the wax to crack or pull away from the sides. If any wax has spilt or the surface is uneven, carefully reheat the top with a heat gun or hairdryer to smooth it out.
Tip: Cover the candles with a cardboard box while cooling to prevent dust from settling on the surface.
Step 9: Remove from Mould
Once the wax is fully set and solid, carefully remove the candle from its mould or container. If you use a paper cup or yoghurt pot, gently peel it away from the concrete. Reusable moulds may require a gentle twist or squeeze to release the candle.
Tip: If the candle resists removal, place it in the freezer for 10–15 minutes to help the mould release more easily.
Step 10: Cure the Wax
Although your candle may look ready, it’s best to let the wax cure for 2–3 days before lighting. This helps harden the wax fully and improves scent throw, especially if fragrance is added.
Tip: To preserve their colour and aroma, store your candles in a cool, dark place during the curing period.
Step 11: Trim and Tidy
Once the wax is fully set, trim the wick to about 5mm above the surface.
Tip: Wipe the outside of the concrete with a damp cloth to remove any residue or fingerprints.
Step 12: Style and Store
Your concrete candles are now ready to use or gift! Display them on trays, stack them in sets, or wrap them in kraft paper and twine for a rustic, handmade feel.
Storage Tip: To prevent discolouration or melting, keep candles in a cool, dry place away from direct sunlight.
Safety Notes:
Always burn candles on a heat-resistant surface
Never leave a lit candle unattended
Trim the wick before each use to avoid smoking
Concrete candles are simple to make, stylish to display, and deeply satisfying to create. They offer a clever way to repurpose leftover materials while adding something beautiful to your space.
Why not give it a try with your next batch of concrete?
DIY Concrete Candles: Frequently Asked Questions
1. Can I use any concrete mix? Yes, most quick-set or general-purpose concrete mixes will work well. Avoid those with large aggregates, as they may not suit smaller containers.
2. What’s the best wax to use for concrete candles? Soy wax is a great eco-friendly option, while paraffin offers a strong scent throw. Beeswax is another natural choice with a pleasant, subtle fragrance.
3. How do I prevent cracks in the concrete? Avoid moving the container while the concrete cures, and ensure the ambient temperature is stable. Pour slowly to reduce air pockets.
4. Can I reuse the same moulds? If you're using paper or single-use cups, they must be peeled away. For reusable moulds, a light coat of oil or mould release spray makes it easier to remove the candle.
5. Why is my wax pulling away from the concrete? This can happen if the concrete is too smooth or cold. Try lightly roughening the surface or warming the container before pouring the wax.
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