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Würth Silicone Filler S

Würth Silicone Filler S

24 in stock

Key Features

  • Excellent adhesion on most traditional building and construction materials without a primer.
  • Neutral curing system that dries upon contact with air moisture.
  • Odour-free formulation for improved working comfort.
  • High elasticity and recovery with permanent flexibility after curing.
  • Durable performance with very good UV resistance.
  • Easy application thanks to smooth extrusion and simple finishing.
  • Complies with DIN 18545-E and ISO 11600 F + G, class 25LM, with SNJF 25E label for glazing and façade applications.
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£8.99 GBP
£8.99 GBP
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Shipping Information

What Are My Shipping Options?

In-Store Pickup

In-Store pickup is available on all purchase. Pickups are available Monday - Friday between the hours of 9:00–17:00. 

An email confirmation will be sent when your order is ready for collection. 

Free Shipping

We offer free Standard (2-3 Days) shipping on orders within the United Kingdom on orders over £100. Please note, some large items that require specialist courier companies, such as large mirrors and palleted items are excluded from this deal.

Shipping Fees

We also offer shipping at the following rates:

Standard-Size Parcel

Standard (UK Only) - 2-3 Days - £2.99

Express (UK Only) - 1-2 Days - £4.99

International (EU) - 3-7 Days - £14.99

International (ROW) - 5-10+ Days -£23.99


Large Parcel

Standard (UK Only) - 2-3 Days - £2.99

Express (UK Only) - 1-2 Days - £4.99

International (EU) - 3-7 Days - £14.99

International (ROW) - 5-10+ Days - £69.99

Most UK orders will be sent using Royal Mail, with larger items being sent with DPD.

International orders within the EU will normally be dispatched with Royal Mail, DPD, or UPS.

International orders to the rest of the world will normally be sent with DPD or UPS.

Please note, international delivery charges are very volatile and subject to change. We will do everything in our power to honour the delivery fee, however, in some cases, shipping may increase in price. In this event, you will be given the offer to pay the difference or cancel the order and receive a full refund.

Please note, we may be subject to various rules and restrictions in relation to some international deliveries, and you may be subject to additional taxes and duties over which we have no control. If such cases apply, you are responsible for complying with the laws applicable to the country where you live and will be responsible for any such additional costs or taxes.

Dispatch Times

Orders placed before 15:00 Monday - Friday will be shipped on the same day. 

Orders placed after this time will be shipped on the following business day,

Please note, we are closed at weekends, as well as English Bank Holidays.

Returns Policy

Our refund policy can be found at the following address: https://esupplyline.com/policies/refund-policy.

Further Information

You can contact us for further information on our shipping policies using the following:

Phone: 01953 711 881

Email: sales@esupplyline.com

Live Chat: Available on our website, Monday - Friday, 8:30 - 17:00.

Contact Form: https://esupplyline.com/pages/contact

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Variant Variant total Quantity Price Variant total
Transparent
Transparent
£8.99/ea 		£0.00
£8.99/ea £0.00
White
White
£8.99/ea 		£0.00
£8.99/ea £0.00
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Description

High-Performance Silicone Sealant

Würth Silicone Filler S is a one-component, neutral cure silicone elastomeric filler designed for a wide range of sealing applications in construction and building. Its low-modulus formula provides excellent flexibility and reliable movement absorption, making it suitable for both structural and finishing seals.

Outstanding Adhesion

This sealant adheres effectively to a variety of traditional construction materials, including glass, wood, PVC, steel, anodised or lacquered aluminium, and concrete. In many cases, no primer is required. For non-standard or sensitive substrates, preliminary adhesion testing is recommended.

Durable and Long-Lasting

Silicone Filler S retains permanent elasticity and demonstrates very good UV resistance, ensuring long-term performance even under challenging environmental conditions. It offers excellent elastic recovery, making it particularly effective for expansion joints, compromise joints, and glazing seals where flexibility is essential.

User-Friendly Application

The filler is highly workable, extruding easily from manual, electric, or pneumatic guns and smoothing cleanly for a neat, professional finish. The neutral alkoxy curing system is odour-free, enhancing user comfort during application.

Standards Compliance

This product complies with DIN 18545-E and ISO 11600 F + G, class 25LM. It also carries the SNJF 25E certification for use in glazing and façade joints, ensuring quality and reliability to professional standards.

Limitations

Not suitable for natural stone, mirror bonding, permanent or prolonged water immersion, aquarium construction, or applications involving accidental food contact.

More Information

Application Instructions

  1. Ensure the substrate is clean, dry, and free from oil, grease, dust, or other contaminants.
  2. Insert the cartridge into a manual, electric, or pneumatic gun and cut the nozzle to the required bead size.
  3. Apply the filler evenly along the joint. The depth of the seal should be approximately half the width, with a minimum depth of 6mm.
  4. Smooth the sealant immediately before skin formation using a spatula and a suitable smoothing agent.
  5. Fresh, uncured silicone can be removed with an appropriate cleaning agent. Fully cured material can only be removed mechanically.

Safety and Usage Notes

  • Always carry out preliminary adhesion tests, especially on delicate or non-standard materials.
  • The sealant must be smoothed before skin formation occurs (approx. 15 minutes).
  • Store cartridges in a cool, dry, frost-free environment.
  • Do not use for natural stone, mirrors, or submerged applications.

Specifications

Contents: 310 ml

Chemical basis: Neutrally networked silicones, with alkoxy (alcohol) basis

Fungicidal properties: No

Colour: Transparent

Min. skin-formation time: 15 minutes

Continuous motion absorption: 25 %

Density: 1.01 g/cm³

Smell/fragrance: Characteristic

Full curing speed/conditions: 2 mm/day at 23°C and 50% relative humidity

Shelf life from production: 18 months

Min./max. processing temperature: +5 °C to +40 °C

Min./max. temperature resistance: -40 °C to +150 °C

Shore A hardness: 24

Min. breaking elongation: 300 %

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