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Wacker Elastosil® M 4630 A/B – White Food-Safe Addition-Cure Silicone for Concrete Moulds & Casting Resins

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Wacker Wacker Elastosil® M 4630 A/B – Witte Voedselveilige Additie Silicone voor Betonmallen & Gietharsen

Pourable, addition-curing, two-component silicone rubber that vulcanizes at room temperature.Main application: making molds for concrete castin., food contact (FDA/ BfR compliant).

€196,75

incl. VAT (21%) €162,60 excl. VAT

S11592

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Premium Food-Safe Addition-Cure Silicone for Professional Concrete and Casting Resin Applications

Wacker Elastosil® M 4630 A/B is a pourable, addition-cure (platinum-cure) two-component silicone rubber (RTV-2) that cures without shrinkage at room temperature. Curing can be accelerated considerably by applying heat. With a low Shore A hardness of approximately 28, a white cured finish and outstanding resistance to concrete, this material has been developed for making durable moulds. The mix ratio is 10:1 by weight, the pot life is approximately 90 minutes and the product is tack-free after approximately 12 hours. Thanks to its good flow and self-de-airing properties, the material produces sharp, accurate impressions of models with deep undercuts. Core applications are concrete moulds and casting reproduction materials such as casting resins.

Key Benefits

✓ Low hardness Shore A28 – supple mould that demoulds easily, even with deep undercuts
✓ High tear strength > 30 N/mm – long mould life with repeated use
✓ Tensile strength 6.5 N/mm² with 700% elongation – withstands mechanical stress during demoulding
✓ Linear shrinkage < 0.1% – dimensionally accurate reproductions without chemical shrinkage
✓ Mixed viscosity 10,000 mPa·s – good flow and self-de-airing for bubble-free moulds
✓ Food-safe in accordance with EC 1935/2004 (BfR XV) – suitable for food contact when processed correctly

Typical Applications

→ Moulds for casting concrete reproductions with deep undercuts
→ Casting moulds for casting resins (epoxy, polyurethane, polyester)
→ Decorative concrete elements and ornamental concrete
→ Reproduction of models in restoration and sculpture
→ Culinary moulds where food contact is required
→ Prototyping and small-batch production of castings

Processing Instructions

First stir component A and component B thoroughly, each separately.
Mix A and B in a 10:1 ratio by weight. Only use A and B with the same lot number.
Mix slowly and thoroughly in a figure-of-eight motion until homogeneous; avoid trapping air.
If required, de-air the mixture under vacuum for an optimally bubble-free result.
Pour the mixture within the pot life of approximately 90 minutes.
Allow to cure for approximately 12 hours at room temperature; curing can be accelerated with heat.

Wacker Chemie AG is the world market leader in the development and production of silicones for industrial and technical applications.

⚠️ Inhibition with platinum-cure silicones: addition-cure silicones can be inhibited by contact with condensation-cure silicones, latex, sulphur-containing materials, and tin- and amine-containing substances, among others. If in doubt, always test on a small area first.

Professional Support

Not sure whether Elastosil M 4630 A/B is suitable for your concrete or resin casting project? We are happy to help you choose the right silicone for your application. Contact us for advice, samples or larger quantities.

Product Properties

Hardness
28Shore A
Hardness of the silicone material
Shrinkage
0.1%
Linear shrinkage after curing
ColorWhiteColor of the finished product
TransparencyOpaqueDegree of transparency
Viscosity
10000mPa·s
Viscosity of the uncured silicone
Density
1.13g/cm³
Density of the cured material
Mix ratio10:1Mixing ratio A : B
Tensile strength
6.5MPa
Maximum tensile force before breaking
Tear strength
30.0kN/m
Resistance against tearing
Elongation at break
700%
Maximum stretch before breaking
Pot life
90minutes
Working time after mixing
Cure time
720minutes
Time until full cure

Physical Properties

Flash point
294°C
Min. temperature at which the product ignites

Component Properties

Color ALight grayColor of component A
Color BWhiteColor of component B
Viscosity A
15000mPa·s
Viscosity of component A
Viscosity B
800mPa·s
Viscosity of component B
Density A
1.14g/cm³
Density of component A
Density B
1.01g/cm³
Density of component B

Certification & Safety

Food-gradeYesSuitable for food contact
Chemical resistanceResistant to concrete and casting resinsResistance to chemicals

Application

Use caseMoulds for concrete and resin castingIntended use
Silicone type["Addition cure","RTV-2"]Type of silicone or polymer
Cure speedNormalHow quickly the material can be demoulded
Cure conditionRoom temperature or heatCondition under which the material cures

Safety Information

Wacker Elastosil M 4630 A/B is not classified as a hazardous substance or mixture under Regulation (EC) No 1272/2008. No GHS labelling is required. The material contains SiH groups and may, under certain conditions, release small amounts of hydrogen; keep it away from strong acids, bases, alcohols and oxidising agents. No respiratory protection is required under normal use. Nitrile rubber or butyl rubber safety gloves, safety glasses to EN 166 and good workplace ventilation are recommended. Do not eat, drink or smoke while working, and wash hands after handling. Always consult the full Safety Data Sheet (SDS) for complete hazard, handling and first-aid information before working with this product.

Safety Pictograms	Safety Data Sheets (SDS)
	📥 EN SDS ELASTOSIL M 4630 A

Signal Word	H‑code	Hazard Statement	P‑codes	P‑statements
Warning	EUH066	Repeated exposure may cause skin dryness or cracking	P264 P362+P364	Wash thoroughly after handling Take off contaminated clothing and wash before reuse

More information about H and P statements: UK HSE &ECHA

Technical data sheets

Frequently asked questions

What is the delivery time for my order?

Orders placed and paid on working days are in most cases shipped the same day. Weekend orders are processed on the next working day.

Indicative delivery times: Netherlands usually within 1 working day, Belgium and Germany typically 1–2 working days, other countries depending on destination and carrier. These are guidelines, not guarantees: peak periods, public holidays or carrier delays can have an effect.

What is the return policy?

You have 30 days to return after receipt. Email info@siliconesandmore.com within 30 days of delivery with your name and order number. The full conditions are in our return policy.

How can I track my order?

As soon as your order has shipped, you'll receive a track & trace code by email. It can take up to 24 hours before the code is active.

I have a problem with my order – how do I reach you?

Can I order as a business?

Yes. Apply for a business account; we review your application within 3 working days. After that you order while logged in and pay on invoice, with payment terms of 14 days after delivery.

EU businesses outside the Netherlands with a valid VAT number order with VAT reverse-charged (0%, intra-community supply). The VAT number is stored in your business account; it cannot be added to an order after it has been placed.

Wacker Elastosil® M 4630 A/B – White Food-Safe Addition-Cure Silicone for Concrete Moulds & Casting Resins