Sealant/Expansion Profile Wolfcraft WF4360000 – 10 mm thickness, 6 m length

Wolfcraft WF4360000 filling and expansion profile is a 10 mm thick, 6 m long compressible strip designed for use as a backing material in joint sealing and gap filling during construction and finishing work. The profile is intended to provide a consistent, compressible support behind sealants and adhesives when installing floors, skirtings, window and door frames, or when sealing expansion joints. Its uniform cross-section and length enable straight, continuous backing that helps produce even joints and tidy edges.

Advantages

The profile offers consistent thickness and compressibility that simplifies sealant application and reduces the risk of three-sided adhesion. Its 6 metre length allows covering long runs with fewer joins, while the 10 mm thickness provides a reliable gap filler and joint backing for common building clearance dimensions. The material is easy to cut to size on site and conforms to irregular surfaces to help achieve a neat finish.

Suitable for

• Providing a backing for silicone, acrylic or polyurethane sealants in floor and skirting installations
• Filling gaps around window and door frames prior to sealing
• Sealing and protecting edges of expansion joints in interior finishing work
• Compressible support where controlled joint depth is required

When it may not be suitable

This profile is intended as a compressible joint backing and is not a structural fastener or load-bearing component. It should not be used as a permanent decorative trim where visible appearance or UV resistance is required, unless covered by a finished trim. The product is not a replacement for specialized insulating or water-stop materials where additional properties (e.g., high thermal insulation, waterproof membrane) are required.

Key specifications

• Thickness: 10 mm
• Length: 6 m
• Form: compressible backing strip/profile
• Typical applications: joint backing, gap filling, edge protection
• Compatibility: suitable as backing for common sealant types (silicone, acrylic, polyurethane)

How to use

Measure the joint or gap to determine the required length, then cut the profile to size with a utility knife or scissors. Insert the profile into the joint so that it sits at the required depth to control sealant thickness; the profile should be recessed below the surface so the sealant adheres to two faces only. Apply sealant over the profile according to the sealant manufacturer's instructions and finish the joint while the sealant is still workable for a smooth, even result.

What to consider before purchase

• Confirm the required joint depth and width to ensure 10 mm thickness is appropriate
• Check compatibility with the sealant type you plan to use
• Assess whether the strip length and the number of pieces needed match the project run lengths
• Determine if additional protective or decorative trim will be needed for visible areas

Usage recommendations

For consistent results, position the profile so sealant contacts only the substrate and the sealant surface, avoiding adhesion to the backing. Trim excess material flush with the joint edges and follow sealant curing times and temperature recommendations for optimal joint performance.