Weber Foam FR – B1 Class Fire-Resistant Polyurethane Foam

Weber Foam FR

Weber Foam FR is a polyurethane-based, single-component filling and insulation foam that cures with ambient moisture. With its B1 fire resistance classification, effective insulation against gas and smoke, and high gap-filling capacity, it provides a reliable solution for both installation and insulation applications.

Product Description

Weber Foam FR is a polyurethane-based, single-component, fire-resistant filling and insulation foam. It reacts with atmospheric moisture to cure and forms a durable insulating barrier on the applied surface.

Advantages

• Strong adhesion performance
• High gap-filling capacity
• Contributes to thermal and acoustic insulation
• Effective insulation against gas and smoke
• B1 fire resistance classification
• Moisture-curing technology
• Free from CFC and HCFC

Areas of Use

Weber Foam FR is suitable for the following applications:

• Installation of door and window frames
• Sealing electrical installations and pipe penetrations
• Insulating wall penetrations of air-conditioning systems
• Filling gaps in roof and wall systems
• Sealing expansion joints

Suitable Substrates

Can be used on the following surfaces:

• Concrete, precast concrete, fiber-reinforced concrete, cement boards, and roof tiles
• Wood, brick, stone, cement-based, and plastered surfaces
• Gypsum boards and hardboard panels
• Metal surfaces

Technical evaluation is recommended for other substrate types.

Surface Preparation

• The substrate must be clean and dry.
• Oil, paint, dust, and other contaminants must be removed.
• Lightly moisten the surface to ensure proper foam expansion and curing.
• For multi-layer applications, re-moisten each layer before applying the next.
• Masking tape may be used to protect sensitive areas.

Application Conditions

• Application temperature: +5°C to +35°C
• Avoid application in excessively hot or highly humid environments.
• Do not apply on frozen surfaces or surfaces at risk of freezing.

Application Instructions

• Shake the can vigorously for at least 30 seconds before use.
• Attach the trigger mechanism and apply the product with the can held upside down.
• Spray the foam at approximately a 45° angle.
• Fill cavities from bottom to top.
• Due to expansion, only about 50% of the cavity volume should be filled.
• Components being fixed should be supported until the foam has fully cured.
• Fresh foam can be cleaned with acetone.
• Cured foam can only be removed mechanically.

Warnings and Recommendations

• Does not adhere to polyethylene, silicone, or Teflon surfaces.
• The foam expands approximately 1.5–2 times its original volume; overfilling should be avoided.
• Deep cavities should be filled in multiple layers.
• In cold weather, allow the product to reach room temperature before use.
• Application should be carried out in well-ventilated areas.
• The use of personal protective equipment is mandatory.

Technical Specifications

Storage

• Store between +5°C and +25°C.
• Protect from direct sunlight.
• As a pressurized container, it must be kept away from temperatures above +50°C.

Safety Precautions

• Wear gloves, safety glasses, and a protective mask during application.
• Avoid contact with skin and eyes.
• In case of contact, rinse thoroughly with plenty of water and seek professional advice if necessary.

Frequently Asked Questions

What applications is Weber Foam FR suitable for?

It is used for door and window installation, sealing service penetrations, filling roof and wall cavities, and expansion joint applications.

What is its fire resistance classification?

The product has a B1 fire resistance classification.

How much does the foam expand?

It expands approximately 1.5 to 2 times its original volume.

Which surfaces does it not adhere to?

It does not adhere to polyethylene, silicone, or Teflon surfaces.

How can cured foam be removed?

Cured foam can only be removed by mechanical methods.