Silton Rubber. Moulded & Extruded Rubber Components | Howrah, India Skip to content
Est. 1984 · Howrah · ISO 9001

Are you throwing away moneyon the wrong polymer?

Silton makes moulded and extruded rubber components. Find your right compound in 30 seconds.

A perished, cracked rubber O-ring beside a new one in the right compound Cheap rubber is the expensive option
Worth Knowing

Two things nobody tells you about silicone.

TECH

The sponge is a workhorse

Silicone sponge takes -60°C to +200°C without complaint. It seals under the lightest closure force, so thin lids and lightweight doors actually close instead of warping against a solid profile. And it barely ages. Sun, ozone and heat cycling do very little to it, which is why a sponge gasket usually outlives the enclosure it sits in.

COST

Extruded can undercut moulded

An extruded silicone gasket can land cheaper than a moulded EPDM one. A moulded gasket needs a mould, and you pay for it. An extrusion die costs a fraction of that and is cut in days. Join the extrusion into an endless loop and any perimeter is possible, still with no mould to pay for. Most buyers assume the opposite until they see the quote.

Product Range

What We Manufacture

Moulded and extruded components across sealing, gasketing, vibration isolation, and custom applications. Manufactured to your drawing or specification. See the full range.

Moulded rubber gaskets by Silton Rubber

Moulded Gaskets

Extruded rubber profiles and channels

Profiles & Channels

Silicone and EPDM sponge profiles

Silicone / EPDM Sponge

Custom moulded rubber components

Bespoke Components

Rubber O-rings in multiple compounds

O-Rings

Rubber cable grommets rated IP67 and IP68

Rubber Grommets

+9 See All Products Full range →
Technical Specialisations

Where We Excel

Four areas where our capability runs deeper than standard rubber manufacturing.

01

Soft Silicone Extrusions, 30 Shore A

Extruding silicone at 30 Shore A is technically demanding, the compound is highly elastic and difficult to control dimensionally through the die. We have mastered the compounding, die design, and vulcanization parameters to produce consistent soft silicone profiles at this hardness, ideal for LED luminaire seals, electronics enclosures, and medical device housings where low closure force is critical.

30 Shore A Hardness Low Compression Load Silicone VMQ
02

Gaskets for IP66, IP67 and IP68 Enclosures

We design and manufacture gaskets that hold IP66, IP67 and IP68, and we engineer them for it rather than just quote the rating. Groove fill, compression set and creep are worked out before the tooling is cut, so the rating survives years in service, not just the type test. Proven in lighting, electronics and electrical fittings.

IP 66 · 67 · 68 Lighting Outdoor Lighting
03

Endless Extruded Gaskets, Cut and Joined

We extrude profiles to precise lengths and vulcanise the cut ends into one endless loop. No glue, no weak corners. The joint is the strong point: done properly it matches the profile for strength, and ours sometimes exceeds it. Just as important, it is consistent. The hundredth loop joins exactly like the first. Any perimeter without new tooling, in A-Type, D-Type, P-Type and custom sections.

Joint As Strong As The Profile Consistent Loop After Loop A-Type / D-Type / P-Type
04

Precision Moulding

Close-tolerance compression and transfer moulding, with every mould CNC-machined in our own toolroom. Complex geometry, rubber-to-metal bonding, and parts from micro O-rings under 5 mm to seals over a metre long.

Close Tolerance CNC Moulds In-House Rubber-to-Metal Bonding
In-House Facilities

End-to-End Manufacturing

Compounding, tooling, moulding, extrusion and testing all happen in-house at our own plants on state-of-the-art machinery. Because design and tooling stay in-house, we cut weeks from typical industry lead times. We control every variable, so we hit our delivery dates and ship the same quality every time.

Compounding & Mixing

Dispersion kneader plus chilled-roll mixing mills. Every formulation mixed in-house.

In-House Test Laboratory

Moving Die Rheometer, tensile, hardness and abrasion testers, aging ovens.

2 Automated Microwave CV Lines

Dedicated continuous vulcanization lines for EPDM and Silicone.

20+ Hydraulic Moulding Presses

From 10"×10" up to 43"×31" platens, including automatic presses.

Dispersion kneader compounding line at the Silton Rubber plant, Howrah
Moving die rheometer in the Silton Rubber test laboratory
Continuous vulcanizing extrusion line at Silton Rubber

See how your part gets made.

See the Process →

Industries

Electronics & Enclosures

Panel seals and grommets from IP54 to IP68, thin sections for compact housings.

Outdoor Lighting

UV-stable silicone and EPDM seals for street lights, floodlights and solar fixtures.

Dehumidifiers & HVAC

Vibration mounts, compressor grommets and door seals that shrug off condensation.

Water, Pipe & Irrigation

Pipe joint gaskets in EPDM and SBR, potable-water grades included.

General Engineering & OEM

Held tooling, stock profiles and call-off supply for pumps, valves and hydraulics.

Import Substitution

Imported parts reverse-engineered and made locally, at or below landed cost.

Solar & Renewables

Junction-box seals and panel gaskets built for decades outdoors.

EV & Li-Ion Batteries

Pack lid gaskets, busbar grommets and vent seals that hold IP67/68 for years.

Clean Plant · Clean Conscience

All-electric heating, no boilers. Process water fully recycled, nothing discharged. Zero waste to landfill. Every unit holds WBPCB Green category certification.

ESG questionnaire? Ask us
Case File · A True Story

The wrong polymer has a warranty bill.

A manufacturer of outdoor luminaires supplies the Government of India on a contract with a long warranty attached. Their gaskets came from another vendor. The first batches started failing in the field. Water was getting past the gasket and killing the electronics. The gasket was neoprene, and inside a luminaire the heat was hardening it years ahead of schedule. A hard gasket does not spring back, and a gasket that does not spring back does not seal.

They brought the problem to us. We redesigned the gasket in silicone. The new cross-section weighs 40% less than the old one, seals perfectly, holds its compression set, and treats those temperatures as a normal day at work.

Outdoor lighting OEM · Government supply contract · Details anonymised

Request a Quote

Send a drawing, a sample, or a short description of your requirement. We reply with material recommendations, pricing and lead times.

Factory
34/1 N. S. Road, Liluah, Howrah 711204, West Bengal
Office
5C Diamond Towers, 37 Diamond Harbour Road, Alipore, Kolkata 700027
Phone / WhatsApp

Founded 1984 · ISO 9001 Certified

Led by Mr. Abhishek Jain, a hands-on entrepreneur whose real interest is the science of rubber, not just the business of it. A rubber component shortage or failure can stop a whole assembly line, so we at Silton treat delivery schedules as seriously as quality.

Have a Question?

Common Questions

Silicone (VMQ), EPDM, FKM (Viton), NBR, Neoprene (CR) and SBR, plus over 800 custom formulations developed in-house for specific temperature, chemical and IP requirements. Tell us your operating conditions and we'll recommend the right compound.

Yes. Grommets, seals, gaskets and profiles for IP66, IP67 and IP68, designed for the compression-set behaviour and creep resistance needed to hold the rating across the product's operational life, not just at first assembly.

Everything from a single prototype to a million pieces. We turn samples around extremely quickly, and repeat orders on existing tooling ship fast.

Yes, both India and the United States. We handle export documentation and the quality certifications US buyers require, backed by a 40-year OEM track record.

Yes. Send a sample, drawing, or datasheet. We reverse-engineer it and manufacture an OEM-approved local equivalent at or below import cost including freight and duties.

A profile extruded to precise length with the cut ends vulcanised into an endless loop: no glue, no weak corners, no new tooling for a different perimeter. The joint compresses like the rest of the profile, so the IP rating holds around the full loop.

30 Shore A, very soft, requiring specialised compounding and die design. Ideal where low closure force is critical: LED luminaires, electronics enclosures, medical housings. Sponge and foam profiles go softer still.

Yes. We extrude silicone tubing in compliant grades for food contact, pharmaceutical, and potable water applications, formulated to FDA 21 CFR 177.2600, BfR Recommendation XV, USP Class VI (chapters 87 and 88) biological reactivity requirements, and BS 6920 (WRAS) for drinking water contact. Sizes from 1 mm to 40 mm ID, custom wall thicknesses to your drawing. Tell us your application and the compliance documentation your industry requires, and we will confirm the right grade before you order.

Absolutely. Send a drawing in any format: STEP, IGES, Parasolid, DXF, PDF, even a hand sketch. We've made everything from micro O-rings under 5 mm to panel seals over a metre long.

Our profiles, joined seals and gaskets are used in IP66 sealing, protected against powerful water jets from any direction. Grommets, O-rings and moulded seals reach IP67, dust-tight with temporary immersion to 1 m for 30 minutes. Custom mouldings and precision seals go to IP68, dust-tight with continuous immersion beyond 1 m, per manufacturer specification. Tell us your enclosure and duty and we will confirm the right profile and compound.