Free delivery in Benelux until 10kg.

AS20 translucent polyaddition silicone

AS 20 is a translucent addition-curing silicone. This silicone is highly accurate in its reproduction of detail. Its beautiful elasticity and incredibly fast setting make it a wonderful silicone to work with.

 36,18 270,91 HT

Description

AS 20 is a translucent addition-crosslinking silicone rubber. Addition polymerization systems are of the highest quality. They offer excellent dimensional stability, low shrinkage and higher chemical resistance.

The choice of a polyaddition silicone is particularly recommended when the mold needs to withstand more than a hundred print runs.

Its high elasticity and mechanical strength make it particularly suitable for industrial-grade molds.

This silicone consists of 2 parts, its base is non-toxic and mixes easily with the corresponding catalyst in a 1:1 mixing ratio.

Its shore A of 20 gives it an appreciable flexibility that will facilitate the demolding operation.

This silicone can be used to make molds for casting polyester resin, epoxy, polyurethane, plaster, wax, etc., and low-melting metals.

Their high resistance to alkaline constituents also makes them suitable for concrete casting.

AS 20 hardens at room temperature; the higher the room temperature, the faster the setting time.

All our silicones in the “AS” range can be thickened by adding our THIXO silicone polyaddition. The resulting paste texture can be applied to vertical elements with a spatula.

Features

Mixing ratio (shore A): 20

Color: translucent

Pot life at 25°C: 25-30′.

Curing time: 4-6h

Viscosity (mPa.s): 3000 ± 1000

Density (g/cm³): 0.98

Tensile strength (MPa): 5.0 ± 0.3

Tear strength (N/mm): 22±2

Elasticity (%): 480

Contraction (%): <0.1

Storage: Store in a cool, dry, well-ventilated place.

Implementation

In a clean, dry container, weigh out the quantity of silicone required and calculate a 1:1 addition of catalyst (e.g.: 100gr base + 100gr catalyst).

Using a spatula, thoroughly mix the two components until a homogeneous paste is obtained; using a mechanical mixer, keep at low speed (300 to 500 rpm) for 2 to 3 min. and keep the mixer head in the silicone to limit the incorporation of air bubbles.

After checking that the formwork is watertight, pour the silicone mixture onto the model to be reproduced.

Aim for the lowest point and pour the silicone in a thin vein.

The first coat can be applied directly with a brush, followed by filling. then fill.

Vacuum preparation is possible at a pressure of 0.85 bar for a maximum of 3 ‘.

Demoulding can take place after +/- 6h of hardening at room temperature. The longer you wait before unmolding, the more time the silicone will have had to reach optimum mechanical properties. In the case of a low-melting metal casting, post-firing is recommended.

Security

Wash your hands and other exposed areas with mild soap and water before eating, drinking or smoking, and when you leave work.

Safety data sheets available on request.