Mold Silicone - Soft (15 Shore A) 5 kg

Unit Price for 1 EUR 180,05

Unit Price for 2 EUR 172,02 Unit Price for 3 EUR 163,99 Unit Price for 4 EUR 155,96 Unit Price for 5 EUR 147,93

Soft mold silicone (15 Shore A) is a liquid mold silicone typically used for creating casting molds. This is the softest silicone we offer, making it ideal for casting items with undercuts or intricate details, where a flexible silicone is required to release the mold without damage. The silicone is easy to work with, demolds cleanly, and is non-toxic. It is white but can be colored using our silicone color or alternatively with our natural pigments. PRO pigments are not compatible with silicone.

This is a tin-cure (condensation) silicone.

Usage:

Mix the silicone with the included curing agent. 1 kg silicone ≈ 0.8 L.
For smaller batches, a syringe can be used to measure the curing agent accurately, though precision may be difficult. For a simpler option, consider our heat-resistant silicone, which mixes 1:1.
Using more than 3% curing agent reduces curing time. Using less extends it.
Always wear gloves when handling silicone, as it is sticky.

Storage & Shelf Life:

Shelf life: 12 months
Storage temperature: 5-10°C
Can be stored at higher temperatures, but not recommended above 25°C

Important:

This silicone is not food-safe certified in the EU, but our heat-resistant silicone has FDA approval in the U.S.

Learn more about this mold silicone and its applications below.

Description

Mold Silicone - Soft (15 Shore A) - Technical Data:

Working time: approx. 20 min
Curing time: approx. 5 hours
Hardness (shore A): 15
Color: White
Viscosity: approx. 8000 mPa.s
Elasticity: 500%
Tensile strength: 3,8 MPa
Tear strength: 22 kN/m
Shrinkage: <0.2%
Melting point: 160ºC

Note: Data applies at 25°C room temperature.

Effecient Silicone Usage for Mold Production
Plan your silicone requirements accurately to optimize material use and reduce waste:

Choose a mold box with at least 1 cm clearance on all sides of your object.
Calculate the total box volume (Length x Width x Height).
Subtract the object’s volume using water displacement or CAD data
Convert volume to silicone weight: 1 kg silicone ≈ 800 cm³.

Example: A 15 × 9 × 10 cm mold box = 1350 cm³. Object volume = 230 cm³ → net silicone volume = 1120 cm³. Required silicone = 1120 ÷ 800 ≈ 1.4 kg.

Mixing and Working with Silicone

Each container of curing agent is designed for 1 kg of silicone.
Mix only the amount you need for the project.
Maximum working time after mixing: 20 minutes.

Forming and Layering

When creating multi-part molds, apply a thin layer of release agent on the cured silicone to prevent the new layer from bonding.
Same principle applies when casting silicone into a silicone mold: always use release agent to prevent adhesion between layers.

Tips

Use gloves when handling silicone.
Apply thin first layers to capture all details before adding thicker layers (5-10 mm) for mold strength.
Silicone cures at room temperature but can be accelerated with controlled heat.

Video Tutorial

Watch our step-by-step guide for casting silicone, demonstrating proper techniques including layering, release agent application, and mold finishing. Materials used in the tutorial include modeling clay, a cardboard box, petroleum jelly, and elastic bands.

Data Sheet: Mold silicone 30, 40, 50 - click here

Data sheet: Catalyst for Liquid silicone - click here