Mold Star™ 20T – 2kg

R818.80

All prices shown include VAT

Mold Star™ 20T – 2kg is an easy to use Shore 20A translucent platinum silicone that is mixed 1A:1B by volume (no weighing scale necessary). It features a relatively low viscosity and vacuum degassing is not required for most applications. Pot life is 6 minutes and cure time is 30 minutes at room temperature.

Mold Star™ 20T – 2kg Features

  • Mold Star™ 20T – 2kg cures in to a soft, strong rubber that is tear resistant and exhibits very low long term shrinkage.
  • Molds made with Mold Star™ will last a long time in your mold library and are good for casting wax, gypsum, resins, and other materials.
  • An infinite number of color effects can be achieved by adding Silc Pig™ silicone pigments or Cast Magic™ effects powders.
  • Mold Star™ 20T – 2kg is heat resistant up to 450°F (232°C) and is suitable for casting low-temperature melt metal alloys.

Cured Mold Star™ 20T silicones have been tested and certified skin safe by an independent laboratory.

Note: This product will not cure against surfaces containing sulfur, even when sealed.

Mold Star 20T Part A - 1kg

R414.00

Out of stock

Mold Star 20T Part B - 1kg

R404.80

Out of stock

Safe & Secure

Safe & Secure Shipping to all South African addresses.

When Do I Get It?

Shipping time is 2 - 5 business days. Excludes weekends & Public Holidays.

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We ensure secure payment with PEV on all orders

In-Store Sales

Shop in-store at AMT Composites in Johannesburg, Cape Town & Durban.

  • Shipping may only be to a physical address within the borders of South Africa. No P.O Box’s allowed.
  • Shipping to outlying or remote areas like farms and game reserves may attract an additional fee.
  • The delivery time to city areas is usually between 2 and 5 working days*. This excludes weekends and public holidays. *Reckoned from time of dispatch to time of arrival to client. This is an estimate and not guaranteed.
Courier Service
We use 4 courier companies for delivery. With sophisticated track and trace equipment, you can pinpoint exactly where your parcel is, from the moment it is dispatched by us, until it’s safely handed over to you the recipient. Your parcel is well packaged and wrapped before delivery. All parcels can be insured for the journey to your door.

We charge a weight based shipping fee.

  1. Standard Shipping 0 to 5kg – R99.00
  2. Shipping Shipping 5.1 to 10kg – R118.00
  3. Standard Shipping 10.1 to 15kg – R140.00
  4. Standard Shipping 15.1 to 20kg – R180.00
  5. Standard Shipping 20.1 to 40kg – R220.00
  6. Standard Shipping 40.1 to 80kg – R250.00
  7. Standard Shipping 80.1kg and more – R400.00

Shipping rates are provided at checkout.

Our delivery service only runs from Monday to Friday. Saturday morning deliveries can be done by special arrangement only and at an additional charge. Please contact us to arrange. We reserve the right to re-quote the delivery fee should this become too expensive.

At AMT Composites we want you to be 100% happy with any purchase you make from us.

Changing your Mind / Right to Cancel

If you change your mind for any reason, goods can be returned to us for a full refund if notified to us within 7 days of delivery; you have a further 7 days to dispatch the goods for their return to us. Goods returned after 7 days will incur a 15% restocking fee of the items being returned.

NO GOODS manufactured or sold by Advanced Materials Technology Pty Ltd will be accepted for a credit if returned after one (1) calendar month of original invoice date.

To return goods that are not faulty (i.e. because you changed your mind) they must be unused and, in the condition, they were delivered to you in. This does mean that, unless found faulty, we are unable to accept returns for:

  • Opened containers of resin, hardener, silicone or chemical release agent, unless found to be faulty or defective.
  • Unrolled and improperly re-rolled fabrics, unless found to be faulty or defective.
  • Any product that you have subsequently cut, shaped, broken or modified, unless found to be faulty or defective.

Refund of Delivery Charges (Cancelled Orders)

If you return an order in its entirety, then your outbound delivery charges will also be refunded (for orders within the South Africa’s Local Area’s.

If you return only part of an order, then the outbound delivery charge refund will be calculated based on the total postage cost of the original order (using standard service) minus the cost to send the items you are keeping (using standard service). Due to the way that shipping costs are incremented, this will often result in no delivery charge refund being due.

Faulty or Defective Goods

Any goods found to be faulty or defective and notified to us within 7 days of delivery can be returned to us for a full refund.

Refund of Delivery Charges (Faulty/Defective Goods)

If you are returning faulty or defective goods, then your outbound and return delivery costs will be refunded in full (for orders from within South Africa’s Local Area’s.)

In the event that you are returning faulty or defective goods which were ordered as part of a larger order then the outbound delivery charge refund will be calculated based on the total postage cost of the original order (using standard service) minus the cost to send the items you are keeping (using standard service).

Please check the box to acknowledge our return’s policy, by doing so you agree to our Return’s Policy of AMT Composites stated above.

Ask AMT

Get true expertise & assistance. Speak with one of our professional consultants in Johannesburg, Cape Town or Durban. Call 011 392 4232.

Mold Star™ 20T – 2kg Usage Instructions

Safety

Use in a properly ventilated area (“room size” ventilation). Wear safety glasses, long sleeves and rubber gloves to minimize contamination risk. Wear vinyl gloves only. Latex gloves will inhibit the cure of the rubber.

Store and use material at room temperature (73°F/23°C). Warmer temperatures will drastically reduce working time and cure time. Storing material at warmer temperatures will also reduce the usable shelf life of unused material. These products have a limited shelf life and should be used as soon as possible.

Cure Inhibition

Addition cured silicone rubber may be inhibited by certain contaminants in or on the pattern to be molded resulting in tackiness at the pattern interface or a total lack of cure throughout the mold. Latex, sulfur clays, certain wood surfaces, newly cast polyester, epoxy or urethane rubber my cause inhibition. If compatibility between the rubber and the surface is a concern, a small-scale test is recommended. Apply a small amount of rubber onto a non-critical area of the pattern. Inhibition has occurred if the rubber is gummy or uncured after the recommended cure time has passed. To prevent inhibition, one or more coatings of a clear acrylic lacquer applied to the model surface is usually effective. Allow any sealer to thoroughly dry before applying rubber.

Even with a sealer, Mold Star™ 20T – 2kg will not cure against surfaces containing sulfur. If you are not sure if your clay contains sulfur, do a small compatibility test before using for an important project.

Applying A Release Agent

Although not usually necessary, a release agent will make demolding easier when casting into most surfaces. Ease Release™ 200 is a proven release agent for releasing silicone from silicone or other surfaces. Ease Release™ products are available from AMT Composites.

Because no two applications are quite the same, a small test application to determine suitability for your project is recommended if performance of this material is in question.

Measuring & Mixing

Before you begin, pre-mix Part A and Part B separately. After dispensing required amounts of Parts A and B into mixing container (1A:1B by volume or weight), mix thoroughly making sure that you scrape the sides and bottom of the mixing container several times.

Optional… Vacuum Degassing

Although not necessary, vacuum degassing helps eliminate any entrapped air in pourable silicone rubber. After mixing parts A and B, vacuum material for 2-3 minutes at 29 inches of mercury, making sure that you leave enough room in container for product expansion.

Pouring

For best results, pour your mixture in a single spot at the lowest point of the containment field. Let the rubber seek its own level. A uniform flow will help minimize entrapped air. If using as a mold material, the liquid rubber should level off at least 1/2” (1.3 cm) over the highest point of the model surface.

Curing

Allow mold rubber to cure for 30 minutes at room temperature (73°F/23°C) before demolding.

Heat Curing

Time to demold can be reduced with mild heat. Example: After pouring Mold Star™ 20T at room temperature, place the mold in a hot box or industrial oven at 140°F (60°C). This may reduce the demold time substantially. Note – time will vary depending on mold thickness.

Making a Brush On Mold?

Mold Star™ 20T – 2kg silicone can be thickened with THI-VEX™ thickener for brush-on application and effects. Do not use other Mold Star™ Series silicones for brush on mold making.

Mold Performance & Storage

The physical life of the mold depends on how you use it (materials cast, frequency, etc.). Casting abrasive materials can quickly erode mold detail, while casting non-abrasive materials (wax) will not affect mold detail. Before storing, the mold should be cleaned with a soap solution and wiped fully dry. Two part (or more) molds should be assembled. Molds should be stored on a level surface in a cool, dry environment.

Weight 2 kg
Dimensions 10 × 10 × 20 cm
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