RTV-2 Silicone · Wacker · 5.25 kg

Wacker Elastosil M 4511 — the very soft RTV-2 silicone for molds that never tear.

Pourable, condensation-curing RTV-2 silicone rubber for mold making. Shore A ~12, 600% elongation, tear strength ≥18 N/mm — made to cast polyester, polyurethane, plaster, concrete, wax, and low-melting alloys. Self-deaerating, no vacuum needed. As of August 2026, a 5.25 kg kit is ₹7,375 incl GST from our Ghaziabad warehouse.

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spec-sheet · wacker-elastosil-m-4511
Wacker Elastosil M 4511 RTV-2 silicone rubber 5.25 kg kit
Elastosil M 4511
RTV-2 silicone rubber · mold making
5.25 kg kit + catalyst
Shore A ~12 · very soft
600% at break
≥18 N/mm
60–90 min @ 23°C
T21 / T51 · 5 wt%
₹7,375
incl. GST · dispatched today Order on WhatsApp →
04Applications

Where Mold Makers Use M 4511

One silicone, six casting materials. M 4511 handles every family of resins and low-melt materials a mold shop pours.

Polyester Resin Molds

High-copy-count molds for polyester casting — outstanding chemical resistance prevents resin attack and mold degradation.

Polyurethane Resin Molds

Flexible molds for PU resin casting with excellent release and faithful detail reproduction, casting after casting.

Art & Sculpture Molds

Statues, reliefs, and decorative objects with deep undercuts — Shore A ~12 makes demolding effortless without damage.

Printing Pads

Low hardness and excellent ink transfer make M 4511 a proven choice for silicone pad printing applications.

Plaster & Concrete Molds

Durable, reusable molds for architectural plaster, concrete casting, and restoration work.

Wax & Low-Melt Alloys

Heat-resistant silicone for wax patterns, investment casting, and low-melting metal alloys.

02Specs

Key Technical Data

All values from the official Wacker Elastosil M 4511 technical datasheet.

Hardness

Shore A ~12

Very soft · great undercuts

600%elongation≥18 N/mmtear strength

Pot Life

60–90 min

At 23°C · T21/T51 5 wt%

4–5 hrsdemold time1:1kit ratio

Casting

All resins

Polyester · PU · plaster · wax

self-deaeratingno vacuumlow-meltalloys OK

Pack

5.25 kg

Base + catalyst kit

1 yrshelf life sealed₹7,375incl GST
03Full Data

Complete Specifications from TDS

Download the full TDS sheet (PDF) →

Property Value Notes
HardnessShore A ~12Very soft — ideal for undercuts
Elongation600%At break
Tear strength≥18 N/mmResists tearing on demold
Pot life60–90 minAt 23°C with T21/T51 5 wt%
Demolding4–5 hrsTypical at 23°C
Storage2–40°C1 year sealed; 6 months opened

TDS and MSDS available on request with every order.

06Quick Answer

Straight Answers

In 8+ years of supplying Wacker silicones to mold shops across India, we process 1000+ orders every month — and M 4511 questions are the ones we answer most.

How much does Wacker Elastosil M 4511 cost in India?

₹7,375 incl GST for a 5.25 kg kit of Wacker Elastosil M 4511, delivered PAN India from our Ghaziabad warehouse. The kit includes the silicone base and the required catalyst. As of August 2026, shipping charges apply on all orders.

What is Elastosil M 4511 used for?

Elastosil M 4511 is used for making flexible silicone molds for casting polyester resins, polyurethane resins, plaster, concrete, wax, and low-melting alloys. Its very low Shore A hardness and high tear strength make it ideal for molds with deep undercuts and intricate details.

Which catalyst should I use with Elastosil M 4511?

Use Catalyst T21 at 5 wt% for molds that will process epoxy or polyurethane resins. Use Catalyst T51 at 5 wt% for polyester resins, plaster, concrete, wax, or low-melting alloys. Both can be blended with Catalyst T47 to adjust pot life and demolding time.

How should I store Elastosil M 4511?

2°C to 40°C is the storage range — keep the silicone in a cool, dry place, containers tightly sealed and away from direct sunlight. Shelf life is 1 year in original sealed containers; once opened, use within 6 months and reseal immediately. Keep the catalyst separate and dry — moisture shortens its shelf life.

What is the Shore hardness of Elastosil M 4511?

Shore A ~12, classified as very soft. This low hardness gives maximum flexibility for demolding parts with deep undercuts and complex geometries without tearing.

How long does Elastosil M 4511 take to cure?

Pot life is 60–90 minutes at 23°C / 50% RH. The silicone becomes tack-free in 8–10 hours, and full mechanical properties develop after 4 days at 23°C. Blend T47 with your catalyst to adjust pot life and demolding time.

Can I use Elastosil M 4511 for epoxy resin molds?

Yes. M 4511 is designed for casting epoxy and polyurethane resins. With Catalyst T21 at 5 wt%, it gives outstanding chemical resistance and extended mold life for epoxy casting applications.

Do you deliver Elastosil M 4511 PAN India?

Yes. We ship from our Ghaziabad warehouse via Delhivery, Blue Dart, or surface transport. Same-day delivery in Delhi NCR for orders before 11 AM. Specify your preferred catalyst (T21 or T51) when ordering.

What safety precautions should I take?

Wear gloves and safety glasses, and work in a ventilated area. Avoid skin contact with uncured silicone and catalyst; in case of contact, wash immediately with soap and warm water.

07Decide

Elastosil M 4511 vs Softer Silicones — Which to Order

`r`n

If you need a silicone that releases delicate parts without tearing, M 4511 is what we ship most — here is how it compares.

Your Job Pick Why Price
Epoxy / PU resin molds with fine detailM 4511 + T21Shore A ~12, high tear strength, resin-safe₹7,375 / 5.25 kg
Polyester / concrete / plaster moldsM 4511 + T51T51 catalyst suits polyester and mineral casting₹7,375 / 5.25 kg
Softest possible release for fragile partsM 4511600% elongation — parts pop out without force₹7,375 / 5.25 kg
09Pricing

Price & Availability

₹7,375 per 5.25 kg kit (incl GST)

Bulk kits and repeat supply contracts priced on request

Price valid until July 1, 2027. Includes one 5.25 kg kit of Elastosil M 4511 with the required catalyst — specify T21 or T51 when ordering. Bulk packs and regular supply contracts available — WhatsApp for the current bulk rate and stock position.

UPI, bank transfer, or credit card invoice via Razorpay link. No COD. GST invoice provided. For enquiries, WhatsApp Jobin directly.

We ship PAN India from our Ghaziabad warehouse — typically 2-7 business days via Delhivery, Blue Dart, or surface transport for bulk. Orders before 11 AM go out same day. All sales are final; see our refund policy. For mould makers in Delhi NCR, the same-day Delhi resin guide and the same-day Ghaziabad resin guide cover the fastest dispatch and warehouse pickup options.

Need Elastosil M 4511 today?

WhatsApp Jobin directly. He will confirm stock and catalyst preference, share the Wacker TDS, and arrange dispatch from Ghaziabad within 24 hours.

WhatsApp Jobin

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