final stage of fibreglass mould making

Hi everyone so hear is the last stage of the ,mould making before we can start running it in foam latex and then platinum silicone .


  • Once the sculpt is protected with several layers of releasing agent you can start the final fiberglass process                                          work experinace photos 409
  • Begin by laying out some plastic sheeting to protect your work area .
  • Next cut up  10-15 small squares of fibre glass tissue in preparation for the next step
  • Mix up half a cup of gel coat with two measures of  catalyst (catalyst is added to speed up the vulcanisation process ).                   DSCF0180DSCF0179
  • Once mixed thoroughly paint the gel coat over the sculpt make sure you cover all the sculpt to pick up all the detail .
  • Then wait for it to cure until it is tacky to touch it  will take from 1hr-2hr depending on the temperature of the room
  •  The next step is to apply a coat of laminating resin over the cured gel coat. This will allow the fibreglass tissue to adhere to the gel coat and prevent any separation of the two layers . Then coat each square of fibre glass tissue with resin and apply it over the gel coat . Make sure you overlap each square to strengthen the layer .
  • As always leave it for 20 minutes and cut any sharp  edges around the mould .
  • After this layer is dry (wait 1hr between layers) repeat the process twice again but with fiberglass matting .
  • The next step is to drill holes through both parts of the mould to allow washers and screws to be used as a way of closing and clamping the mould shut. This is important as the mould needs to be tightly closed to ensure the edges set  thin . Make sure you don’t drill the holes through the keys in the mould .
  • After the holes are drilled the mould can then be separated and clean . Be patient as carefully when opening the mould  as you don’t want to damage anything .
  • Now clean out the Plasterline from the mould in preparation for running foam latex . I also use lighter fluid to further clean the mould as this dissolves the Plasterline easily.                                                                                                                                                              work experinace photos 442

Thanks for reading

Bex 🙂


As I have had quite a lot of practice with fiberglass I now feel confident enough with this process.. Overall I am very happy with quality of the moulds i have created . But i will really see how good they are when we start running them for foam latex .


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