Name: 2kg PrismX Liquid Silicone Rubber Mould Making Kit - 1:1 Mix - Food Grade SH25
Brand: Watchmen
SKU: WG-SILICONE-2KG
Price: 69.0 AUD
Availability: OutOfStock
Rating: 5.0 (1 reviews)

2kg PrismX Liquid Silicone Rubber Mould Making Kit - 1:1 Mix - Food Grade SH25

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2kg PrismX Liquid Silicone Rubber Mould Making Kit - 1:1 Mix - Food Grade SH25

PrismX Liquid Silicone Rubber is a high-quality, platinum-grade RTV-2 silicone rubber, ideal for mould making in various arts and crafts projects. It's perfect for casting resins, wax, plaster of Paris, concrete, soap, candles, and even food-related molds like candy, chocolate, and cakes.

Key Features:

1:1 Mixing Ratio: Part A (1kg) and Part B (1kg) mixed by weight.
Food-Grade & Skin Safe: Safe for creating food molds and skin contact.
Working Temperature: Optimal at 25°C.
Work Time: 40-50 minutes.
Cure Time: Demolds in 6-8 hours.
Color: Translucent for clear and precise mold making.

Physical Properties:

Material: Synthetic food-grade silicone rubber.
Viscosity: 280,000 +/- 3000 CPS for smooth pouring.

Hardening Properties:

Hardening Ratio: For brush molds, add 2-3% hardener, adjusting for desired softness.
Operation Time: 10-20 minutes for brushing, 40-50 minutes for filling, with 5-6 hour demolding time.

Post-Hardening Properties:

Shore Hardness: 25 +/- 2.
Tensile Strength: 3.5 +/- 0.3 MPa.
Tear Strength: 21 +/- 2 N/mm.
Elongation: 450 +/- 50%.
Minimal Shrinkage: Less than 0.3%.

This versatile, food-safe silicone is ideal for both artistic and functional projects, offering durability, flexibility, and precision.

Works well, easy to use.

It works well and cures in about 8 hours. Only thing to be careful of is to make sure the item you're trying to cast isn't an inhibitor of platinum based silicone.

I wasn't able to cast my resin 3d prints because they inhibit the curing process. Likewise I tried using bluetac to hold down some parts in the container but the bluetac inhibited the curing in those spots.

TLDR This is a good kit but do your research about what you want to cast first to make sure it will work with platinum silicone. Otherwise try using tin base silicone to make a mold first as it's less reactive.

If you still need the final mold to be food safe do:
make original mould in tin silicon -> cast an object from it using a material you know is safe with platinum silicone -> make a platinum silicone mould with this kit using the new object you cast from the tin mould.

Anyway this is a good kit.