Register here in three simple steps to use all functions of the shop.
Sales to business customers only
Register here in three simple steps to use all functions of the shop.
Sales to business customers only
When it comes to professional insulation, gap filling, and sealing, Würth B3 PU Foam delivers proven German quality and reliability.
This one-component, moisture-curing polyurethane foam expands and hardens upon contact with moisture, forming a durable, airtight, and thermally efficient seal on almost any surface.
Designed for professional use across construction, installation, renovation, and interior finishing, Würth B3 PU Foam combines strong adhesion, fine cell structure, and high yield performance, making it a trusted choice for contractors, technicians, and builders in the UAE and beyond.
Würth B3 PU Foam comes in a 750 ml pressurized canister, equipped with a straw applicator, allowing easy and precise application in tight or irregular spaces.Once cured, the foam forms a tough, flexible, and moisture-resistant structure that provides long-lasting thermal and sound insulation.
Its multi-purpose formulation makes it suitable for a wide range of applications from door and window frame installation to filling structural gaps and cracks, insulating pipes, or bonding building materials like wood, metal, and concrete.
• Excellent Bond Strength : Ensures strong adhesion to substrates such as concrete, brick, stone, metal, and wood.
• Superior Insulation : Provides both thermal and acoustic insulation, improving energy efficiency and reducing noise.
• Multi-Purpose Use : Perfect for filling structural gaps, cracks, engineering holes, and joints in construction and repair work.
• Environment-Friendly Formula : CFC and HCFC free, compliant with environmental standards.
• Easy Application : Comes ready to use with an adaptor head suitable for straw.
• Fast Curing Time : Tack-free in just 10 minutes and can be cut after 60 minutes.
• Wide Temperature Resistance : Performs reliably between -40°C to +90°C.
• Installation and insulation of door and window frames
• Sealing gaps between walls, ceilings, and floors
• Thermal and acoustic insulation around pipes, cables, and conduits
• Fixing parquet, laminate, or solid wood flooring
• Bonding facing boards and cardboard in interior projects
• Moisture-proof and dust-proof sealing in construction joints
• Contents : 750 ml
• Cell Structure : Homogeneous
• Colour : Beige
• Chemical Basis : Polyurethane
• Tack-Free After : 10 min
• Can Be Cut After : 24 Hours
• Temperature Resistance : -40°C to +90°C
• Yield (Approx.) : 40
• Building Material Class : B3
• Shelf Life : 12 Months
Würth Catalogue
• Keep away from children : Store the foam in a place that children cannot reach to avoid accidental contact or misuse.
• Avoid direct contact with skin and eyes : Handle carefully and use protective gloves and eyewear to prevent irritation.
• In case of skin contact : Wipe off excess foam immediately and wash the area with soap and water. Seek medical attention if irritation persists.
• In case of eye contact : Rinse eyes thoroughly with plenty of water while keeping the eyelids open. Seek medical advice promptly.
• Use protective gear : Always wear gloves and safety eyewear during application.
Discover the Würth Happiness Center – your dedicated hub for expert support & personal service. From product guidance to order updates & technical advice, we’re here to help you deliver top service to your customers.
Explore the Happiness CenterAfter activating this functionality, your login data (customer number and partner number) is saved as a so called Cookie on your local file system. We recommend to use this function only if no other users are working with this computer, tablet or smartphone. In generally we suggest: Log out after your purchase. More information about Cookies can be found in our data privacy statement."
You will find your customer number on a Würth invoice, a delivery note or an order confirmation. It will be displayed on the first page, in the top right hand corner. If you do not have any of these Würth documents, please call our service hotline on 800 98784. You can reach us from Mondays to Fridays from 8:00 am to 5:00 pm (not on public holidays).
You are still not a Würth customer? You can register online in a few simple steps. Once you have successfully registered, you will have access to all prices and can then place an order. Click on "Register now".
To log in with your mobile phone number please enter your mobile phone number, verified during the registration process. If you didn’t verify your mobile phone number yet please use the Partner Number login and verify your mobile phone number after login in ‘My Account’ Settings.
You are not yet a Würth customer? You can register online in a few simple steps. Once you have successfully registered, you will have access to all prices and can then place an order. Click on "Register now"
You will receive your partner number together with your login details once you have successfully registered on the Würth Online Shop via an email to the email address you specified on the registration form. Alternatively you can contact your sales representative. If you do not have this data, please call our service hotline on 800 98784.
To log in with a personal login name, please enter the login name you have chosen. If you have not yet assigned a login name, please use the login with customer number and assign a login name after successful login in the settings of 'My account'.
The password for the Würth Online Shop is either the password you entered during the initial registration, or the password given to you by your company. The password must be at least 8 characters long and be composed of numbers and letters, with at least 4 different characters. The use of special characters is not permitted. The following terms are also not allowed as a password: your customer number, "wuerth1", "abcdefg".
After activating this functionality, your login data (customer number and partner number) is saved as a so called Cookie on your local file system. We recommend to use this function only if no other users are working with this computer, tablet or smartphone. In generally we suggest: Log out after your purchase. More information about Cookies can be found in our data privacy statement."
You will find your customer number on a Würth invoice, a delivery note or an order confirmation. It will be displayed on the first page, in the top right hand corner. If you do not have any of these Würth documents, please call our service hotline on 800 98784. You can reach us from Mondays to Fridays from 8:00 am to 5:00 pm (not on public holidays).
You are still not a Würth customer? You can register online in a few simple steps. Once you have successfully registered, you will have access to all prices and can then place an order. Click on "Register now".
To log in with your mobile phone number please enter your mobile phone number, verified during the registration process. If you didn’t verify your mobile phone number yet please use the Partner Number login and verify your mobile phone number after login in ‘My Account’ Settings.
You are not yet a Würth customer? You can register online in a few simple steps. Once you have successfully registered, you will have access to all prices and can then place an order. Click on "Register now"
You will receive your partner number together with your login details once you have successfully registered on the Würth Online Shop via an email to the email address you specified on the registration form. Alternatively you can contact your sales representative. If you do not have this data, please call our service hotline on 800 98784.
To log in with a personal login name, please enter the login name you have chosen. If you have not yet assigned a login name, please use the login with customer number and assign a login name after successful login in the settings of 'My account'.
The password for the Würth Online Shop is either the password you entered during the initial registration, or the password given to you by your company. The password must be at least 8 characters long and be composed of numbers and letters, with at least 4 different characters. The use of special characters is not permitted. The following terms are also not allowed as a password: your customer number, "wuerth1", "abcdefg".
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