TP650 Compriband Expanding Foam Tape – Multi-Layer Window & Door Sealing Tape (Weatherproof, Airtight, Thermal Insulation)

TP650 Compriband Expanding Foam Tape is a high-performance, multi-functional self-adhesive foam tape designed for professional window and door sealing. Manufactured from open-cell polyurethane foam impregnated with flame-retardant synthetic resin, TP650 offers exceptional durability, weather resistance, and long-term elasticity. It is ideal for creating airtight, weatherproof, and thermally insulated joints in both new-build and replacement window installations.

This expanding foam insulation tape follows the “inside tighter than outside” principle, offering variable vapour diffusion through its patented, one-sided side impregnation. This ensures the interior seal is more airtight while allowing moisture to escape externally — helping to prevent mould, fungi, and condensation build-up over time.

Engineered for efficiency, TP650 Compriband window seal tape enables rapid installation in a single step — up to five times faster than traditional foil and PU foam methods — without compromising energy performance or long-term durability.

Key Features & Benefits:

• ✔ 3-in-1 sealing: Airtight, thermal, and driving rain resistance in one product

• ✔ Expanding foam tape for fast and reliable joint sealing

• ✔ Excellent thermal insulation tape with lambda value of 0.048 W/m·K

• ✔ Resists driving rain up to 600 Pa

• ✔ Weatherproof tape suitable for external and internal applications

• ✔ Provides sound insulation up to 45 dB

• ✔ UV stable and temperature-resistant (-30°C to +80°C)

• ✔ Self-adhesive for easy application – no solvents required

• ✔ Suitable for modular builds, window frames, façade systems, and curtain walls

• ✔ Complies with BS8213-4:2016 and GGF installation guidelines

• ✔ Meets DIN 4102 B1 fire classification (flame retardant)

Applications:

• Sealing perimeter joints of windows and doors

• Use in wooden, metal, and modular constructions

• Compatible with warm window sill systems (e.g. PR003 XPS Premium)

• Ideal for pre-compressed joint applications in both residential and commercial buildings

• Use alongside waterproof membranes for enhanced rainwater management

Available Sizes:

The TP650 expanding foam tape is available in various widths and expansion ranges to suit different joint dimensions. Whether you need a narrow strip for smaller frame gaps or a wider version for deep cavities, we have the correct foam gap filler strip for your project.

👉 Please select the correct size for your installation based on frame depth and joint width. Sizing guidance is available in the product technical sheet.

Performance Highlights:

• Airtight to EN 1026: a ≤ 0.1 m³/[h·m·(daPa)n]

• Rain tight to EN 1027: up to 600 Pa

• Thermal resistance: λ = 0.048 W/m·K

• Vapour diffusion resistance (Sd) outer: < 0.5 m

• Acoustic insulation: up to 45 dB (at 10 mm joint width)

• Certified as compriband expanding tape under DIN 18542 BG1 / BGR

Why Choose TP650?

Unlike traditional expanding foam filler or single-layer sealing tape, TP650 ensures full-spectrum joint protection – sealing against air leakage, thermal bridging, moisture ingress, and noise transmission, all in one product. Thanks to its waterproof expanding foam properties and robust flame-retardant formulation, it’s a smart, long-term investment in building envelope performance.

Delivery Time:

📦 Fast dispatch across the UK – delivery within 7 working days
Stocked in multiple sizes and rolls – large orders welcome.