Cleansing Seaweed & Sea Salt Soap

This beautiful ocean blue soap comprises of skin softening seaweed and stimulating sea salt, a gentle scrub with this soap will leave you feeling refreshed and revived.

Because bladderwrack grows in the sea, it accumulates and concentrates various minerals and nutrients not readily found in earthbound plants.  Such rich vitamins and minerals nourish dehydrated and mature skin, leaving it well-moisturised. Salt is a perfect exfolient and as it’s rich in sodium, magnesium and other minerals it also helps to soften skin.

We’ve used a mixture of clear and white soap bases for this soap. With a base of white any colours added obviously become more pastel, by mixing it with a clear base it allows you to get stronger colours which is what we wanted for this marine inspired soap.

We used;

Dolphin Clear melt and pour soap base

Dolphin White melt and pour soap base

Dead sea salt

(any salt will do, remember that the more coarse the grain the more “scrubby” it will be!)

Bladderwrack (seaweed) cut

Bay Rum Fragrance

Green GTSC powder (ci61570)

You will need to disperse the powder 5% by weight in 95% water. (To make 20ml this would be 1g of powder to 19g of water)

You’ll also need;


Heat proof bowl


Mould (we used this one)



  • Measure out equal amounts of the two soap bases ( you could use different ratios if you wanted a more translucent soap)
  • Cut into small chunks, to make it easier to melt
  • Pop into a heat proof bowl or jug that is suitable for use in a microwave
  • Melt in a microwave in 30 second blasts. You want the base to be just melted but not overly hot. Leaving a few un-melted solid pieces is fine, just stir gently until they are fully melted. (If you don’t want to use a microwave melt using the double boiler method)
  • Once melted you can add colour. We suggest using a pipette to add the colour a few drops at a time until you reach the desired colour.
  • Once happy with the colour you can add fragrance if you want, we recommend using 2% essential or fragrance oils and stir well ensuring the fragrance evenly distributed throughout the soap base.
  • Sprinkle the salt and the seaweed into the base of the mould
  • Gently pour a little soap into the base of the mould covering the salt and seaweed. You may want to give it a little stir around to ensure it is covered in soap and there are no air bubbles.
  • Once happy that the salt and seaweed are well covered gently add the remainder of the soap to fill the mould and leave to set. You can give the surface a spritz with alcohol to remove any bubbles
  • Then all that is left to do is slice your loaf into bars. To ensure you don’t drag the salt through the soap when cutting place the salt side on the cutting board and use a sharp knife of cutting wire from the top down.

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