SX Siroflex PU Hand Held Expanding Foam 750ml

Professional Polyurethane Gap Filler, Fixing & Insulating Foam

SX Siroflex PU Hand Held Expanding Foam is a high-performance polyurethane foam designed for professional fixing, filling, insulating, and sealing applications. The gun-grade formula provides precise control and efficient application, making it ideal for construction, refurbishment, and general building maintenance.

Perfect for sealing gaps, fixing frames, insulating cavities, and reducing heat loss, this expanding foam delivers excellent adhesion to most common building materials and expands up to 30 times its original volume to fill even awkward or irregular spaces.

Key Features

✔ Quick Drying Formula

• Tack free in just 8-12 minutes
• Allows faster project completion
• Can be painted over once fully cured

✔ Expands Up To 30 Times

• Fills large, irregular, and hard-to-reach gaps
• Creates an effective airtight seal
• Excellent cavity-filling performance

✔ Fixing & Securing

• Ideal for securing:
  • Window frames
  • Door frames
  • Loose tiles
  • Building components

✔ Thermal & Acoustic Insulation

• Helps reduce heat loss
• Improves sound insulation
• Suitable around:
  • Pipework
  • Ducting
  • Cable penetrations
  • Brickwork and cladding

✔ Sealant Backing Material

• Suitable as a backing material in low-expansion joints
• Compatible with many sealant applications

Typical Applications

• Filling gaps and cavities
• Installing doors and windows
• Insulating around pipes and cables
• Sealing construction joints
• Roofing and cladding work
• General building and DIY projects

Product Specifications

• Brand: SX Siroflex Professionals
• Product Type: Hand Held Expanding PU Foam
• Capacity: 750ml
• Formula: Polyurethane Foam
• Application: Hand Held
• Colour: Cream/Yellow (cured foam)
• Paintable: Yes, once cured

Package Contents

• 1 x SX Siroflex Professionals 750ml Polyurethane Expanding Foam

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Why Choose SX Siroflex?

SX Siroflex Professional products are trusted by tradespeople for delivering reliable performance, strong adhesion, excellent insulation properties, and fast curing times, helping you complete jobs quickly and efficiently.