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Mold Maker RTV Silicone Rubber 20kg + Catalyst 1L


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Making your own flexible and sustainable molds is easier and faster than ever with Craftiviti Mold Maker RTV Silicone Rubber! RTV stands for Room Temperature Vulcanizing which means the silicone will... Read more

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Mold Maker RTV Silicone Rubber + Catalyst

Mold Maker RTV Silicone Rubber + Catalyst

Making your own flexible and sustainable molds is easier and faster than ever with Craftiviti Mold Maker RTV Silicone Rubber! RTV stands for Room Temperature Vulcanizing 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 which 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


CAUTION - Do not use this product with Sulfur-based Clays

Use Sulfur-free clays when working with RTV. Any clays or master objects containing Sulfur will stop the  RTV from hardening. 

Clays such as paper clays, Plastercine contain sulfur and cannot be used with RTV Mold Maker.  

Compatible clays : Alumilite Modelling Clay 


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


Stir Mold Maker RTV Silicone Rubber. Pour desired amount into a mixing cup.
Shake the hardener bottle. Drip 3% of hardener to the total weight of RTV Silicone. Stir the mixture.
Pour mixture slowly over master object to avoid bubbles.
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 measurement 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% hardener will harden faster with a shorter work time.
When using any clay or release agents, please ensure the items contain NO SULPHUR as sulphur will inhibit the curing of 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 enquiry@craftiviti.com.

Delivery Days

We process online orders within 2-3 working days. 

For Peninsular Malaysia, you should receive your parcel within 2-5 working days and East Malaysia, within 5-14 working days. There are no deliveries on Saturdays and Sundays.

Delivery rates

The delivery rates will be automatically calculated for you upon checkout.

Peninsular Malaysia  Rates (RM)  Sabah & Sarawak  Rates (RM)
 0-3kg 6 0-1kg 21
3-5kg 9 2kg 32
6kg 10 3kg 47
7kg 11 4kg 62
8kg 12 5kg 77
9kg 14 6kg 92
10kg 15 7kg 108
>10kg auto calculated at checkout > 8kg auto calculated at checkout


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.

These items are PROHIBITED from shipping to East Malaysia : 
- Isopropyl Alcohol, Denatured Ethyl Alcohol / Ethanol, Mold Release Agent Spray


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.


International Deliveries

Currently we only ship to Singapore and Brunei but don’t let this stop you for writing to us. Email us at enquiry@craftiviti.com to give us your order list and request for shipping rates to your country. We would be delighted to check for you.

Shipping Partners

We use a variety of shipping partners for West Malaysia and East Malaysia. You’ll be informed of the courier service handling your order and the respective tracking number in the shipping confirmation email we send out.

If you would like to arrange a private pick up under your own freight account, please feel free to let us know the details.



If a parcel arrives damaged, take photos of the damaged box before you open the parcel. Then open the package and carefully check your goods for signs of damage.

If your items are damaged, take photos of all damaged items. Reseal the box, send us the photos and we will arrange a reverse pick up. We will then resend you a new set of items. Please note that you must contact us within 24 hours of delivery. Don’t forget to keep all damaged goods and their packaging as you may be required to return these to us.

Once we receive your parcel, only then will we send the replacements to you.


Delivery Delays

Slight delays will also happen due to public holidays and festive seasons. Your kind understanding is deeply appreciated.

Holiday Slowdown

While we are open during some public holidays, our courier partners may not be. Hence, you may get a response from us because we work really hard to get your materials out to you. However, the parcels will not be picked up until after the holidays. Again your kind understanding is deeply appreciated.

Change of address

Once an order has been sent out, we cannot change the mailing address. So please check your mailing address and ensure it is correct and made to the location you desire.



Unfortunately once the materials have been sent out, we will not entertain any returns or change of products due to wrong product ordered or change of mind. So please do check your orders to make sure everything is what you need before making payment.

Prohibited items

For our customers in Sabah and Sarawak, we are unable to deliver any item that is contained in an aerosol. Do check the dangerous goods or hazardous goods list before making your order.


Singapore Orders

All Singapore orders will have an additional 7% Singapore custom tax charged separately. This will be borne by the customer during delivery.
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