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Würth A9 BAS - Neutral Silicone

Würth A9 BAS - Neutral Silicone

In stock

Key Features

  • Excellent durability with resistance to ageing, weathering, and UV exposure.
  • Paint-compatible once cured (preliminary testing recommended).
  • Neutral curing system for reliable adhesion without strong odour.
  • Versatile adhesion to a wide range of substrates including glass, metals, ceramics, and plastics.
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£7.99 GBP
£7.99 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

View full details

Description

High-Quality Neutral Silicone

Würth A9 BAS is a one-component, neutral-curing silicone sealant designed for reliable joint sealing in both interior and exterior applications. Its alkoxy-based curing system provides strong, elastic joints with long-term resistance to ageing, weathering, and UV exposure.

Versatile Application Scope

This sealant adheres effectively to a wide variety of construction and building materials without requiring a primer in most cases. Typical substrates include glass, tiles, ceramics, enamel, clinker, and various metals such as aluminium, steel, zinc, and copper. It also bonds well to painted, glazed, or impregnated woods and many plastics.

Durability and Flexibility

Würth A9 BAS maintains elasticity after curing, absorbing up to 20% continuous joint movement. Its robust properties make it suitable for connecting, expansion, and sealing joints where flexibility and durability are essential.

Paint Compatibility

Once cured, the sealant is paint-compatible, allowing seamless integration into painted or finished surfaces. However, compatibility tests should always be performed to ensure proper adhesion and finish.

Professional Standard Performance

The product’s stable formulation ensures smooth extrusion and easy finishing with a professional appearance. Its neutral cure makes it odourless and user-friendly, while meeting construction requirements for indoor and outdoor use.

More Information

Application Instructions

  1. Ensure that the substrate is clean, dry, and load-bearing before application.
  2. Observe joint dimensions as per technical data sheet.
  3. Insert PE back-fill material into the joint where required.
  4. Treat porous substrates such as concrete with Würth Primer prior to application.
  5. Apply the sealant evenly using a manual, electric, or pneumatic gun.
  6. Smooth the sealant before skin formation using Würth Sealant Smoothing Agent.

Safety and Usage Notes

  • Always perform preliminary adhesion and compatibility tests on the substrate.
  • Sealant must be smoothed before skin forms (approx. 15-40 minutes depending on conditions).
  • Store cartridges in a cool, dry, frost-free environments.

Specifications

Contents: 310 ml

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

Fungicidal properties: No

Colour: White

Min. skin-formation time: 15 minutes

Skin-formation range/conditions: 15–40 minutes at 23°C and 50% relative humidity

Continuous motion absorption: 20 %

Density: 0.99 g/cm³

Smell/fragrance: Characteristic

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

Shelf life from production: 12 months

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

Min./max. temperature resistance: -40 °C to +120 °C

Shore A hardness: 24

Min. breaking elongation: 250 %

Building material class: B2 – Normally inflammable