Mold Maker RTV Silicone Rubber

Rated 4.50 out of 5 based on 8 customer ratings
(8 customer reviews)

Making your own flexible and sustainable molds is easier and faster than ever with Craftiviti’s Mold Maker RTV Silicone Rubber! RTV




Making your own flexible and sustainable molds is easier and faster than ever with Craftiviti’s Mold Maker RTV Silicone Rubber! RTV stands for Room Temperature Vulcanising which means the silicone will cure at room temperature so our Mold Maker RTV Silicone Rubber doesn’t require any additional heat to cure.

The silicone rubber will cure and become a strong and flexible rubber that is tear-resistant and good for multiple uses. Molds made with our Mold Maker RTV Silicone Rubber are suitable for casting using liquid plastic, epoxy resin, concrete, soaps, candles and others.

Each Mold Maker RTV Silicone Rubber comes with a 50ml Hardener (Catalyst)

Mold Maker RTV Silicone Rubber Material Safety Data Sheet
Mold Maker RTV Silicone Curing Agent Material Safety Data Sheet



Base Viscosity = 24000 cP
Density = 1.18 g/cc
Strength Resistance = 3/Nmm2
Hardness after 72h = 21± 2 shA
Tear Resistance = 17/Nmm
Elongation at break = 400%
Pot life = 20 minutes
Fully cure time = 12 hours
Cured mold color = White

Made in Italy


  1. Stir Mold Maker RTV Silicone Rubber. Pour desired amount into a mixing cup.
  2. Shake the Hardener bottle. Drip 3% of Hardener to the total weight of RTV Silicone. Stir mixture.
  3. Pour mixture slowly over master object to avoid bubbles.
  4. Depending on size, the silicone will set within 2 to 8 hours.
    (Always spray master object with Silicone Mold Release agent)

*Please note that the stirring and measurements of this silicone rubber must be precise. Read product warranty below*


  • 3% of hardener provides a more fluid mix with a longer work time.
  • 4% hardens faster with a shorter work time.
  • When using any clay or release agents, please ensure the items contain NO SULFUR as sulfur will inhibit the curing the silicone rubber.

For 2 part silicone-to-silicone molds, you will need to apply a generous layer of mold release agent, otherwise the mold will not separate.

Cured Silicone Rubber can withstand casting heat up to 100 °C.



There is no warranty for this product and it is up to the end user to determine the suitability and the end result. Please read the instructions above clearly before starting. When making a 2-part mold always use a generous amount of non-sulphur mold release agent as silicone will fuse to silicone. Always conduct a small scale test before attempting on a larger scale.


Want to see how this product looks like in real life? Visit us at our store at 10 Boulevard, Petaling Jaya!
For bulk orders, kindly email [email protected]

Additional information

Additional information

Weight0.65 kg
Dimensions22.5 × 15 × 22 cm

CF10915 – 1kg + Hardener 50ml, CF12894 – 500g + Hardener 25ml

Reviews (8)

8 reviews for Mold Maker RTV Silicone Rubber

  1. Rated 4 out of 5

    Muhammad noraffandi bin shamsudin


    1. Mold Maker RTV Silicone Rubber – 10kg
    2. Hardener
    3. Ease Release Agent / 1

    Quotqtion Price RM


    • Craftiviti (store manager)

      Hi Encik Shamsudin, we have already sent you an email quotation. Thank you.

  2. Rated 5 out of 5

    Muhammad Hanif Ramlee

    Easy to use. Thanks Craftiviti.

    • Craftiviti (store manager)

      Welcome Hanif! Have a great day! And Happy Crafting!

  3. Rated 5 out of 5

    Jason yong (verified owner)

    Not so newbie friendly because hardener does not have colour, quite difficult to see whether it is properly mix or not. Overall im quite satisfied with the product.

    • Craftiviti (store manager)

      Hi Jason, we too wish the hardener has some pigment to indicate the mixing completion. However the pigment kept caking up. Thank you for your feedback and we are happy the RTV works for you. Happy Crafting!

  4. Rated 4 out of 5



    1)What is the amount should I use to mold a bottle sized around a normal ‘beer’ bottle? 1kg sufficient?
    2) To mold a glass bottle, do i need a release agent? Does the silicone will stick to the bottle like a normal caulk gun silicone did?

    • Craftiviti (store manager)

      Hi Azrul, thanks for writing.
      1) 1kg should be sufficient for a standard beer bottle however, do take into account wastage using the mixing process. Keep your mold cavity small to save on more RTV usage.
      2) Best to use with a mold release agent. Makes removal a lot easier.
      Hope this helps.

  5. Rated 4 out of 5

    Kat Azman


    Does this one has food grade certification? If not, do you sell the one with food grade?

    Advance tq.

  6. Rated 4 out of 5

    Faizal Azmi


    What is the shore hardness scale, pot life, cure time?
    What color is this silicone after cured, and do you have additional color pigment for this product?

    If using it without agent release, will it bond to the subject? Because that’s what I’ looking for.

    Thank you

    • Simon Foo

      Hi Faizal, here are the information for the Mold Maker RTV Silicone Rubber:

      Hardness after 72h = 21± 2 shA
      Fully cure time = 12 hours
      Cured mold color = White

  7. Rated 5 out of 5

    afaidaud (verified owner)

    Hi, it say 3-4% hardener, can you give me the formula to calculate. My math is bad

    • Simon Foo

      Hi there, the 3% – 4% is depending on the total Mold Maker Silicone Rubber used. For example, if you are using 1kg(1000g) and 3%, the calculation would be 1000(g) x 3% = 30ml.

  8. Rated 5 out of 5

    Muhammad Nazirul Helmi bin Idrus (verified owner)

    sampai dengan cepat dan bungkusan sangat kemas

Add a review
Shipping & Tracking
Shipping of Craftiviti craft materials will go through DHL to West Malaysia (Peninsular) ). GDex Express to East Malaysia (Sabah Sarawak).

The delivery rates will be automatically calculated for you upon checkout. At the checkout page, add in your address to view our shipping rates.

*Due to Singapore customs restriction, kindly send us an email to order and we will guide you from there.

East Malaysia Orders

Liquid items to Sabah and Sarawak may experience slight leakage due to air pressure. Necessary packing procedures will be taken to minimize this occurrence.

Once payment has been received, your order will be processed within 3 working days and will arrive at your door step within 7 working days.

Your tracking number will be provided to you once collection has been made at our end.

Urgent Order

While we would love to accommodate all urgent orders and get your craft materials to you as soon as possible, it would be safer for you to allow a window frame of 3 to 7 days for delivery in case of any delays during delivery.

Tracking Details

Once GDex has collected the parcel, we will send the tracking details to your email address and to the order page at My Account.

You can view the tracking number by going to Orders at My Account or at the link below.