Sealant Backing Rod Wolfcraft Profil wypełniający WF4362000 — 20 mm diameter, 6 m length

Wolfcraft Profil wypełniający WF4362000 is a flexible foam backing rod with a 20 mm diameter and 6 m length designed to act as a compressible joint filler behind sealants and caulks. It provides uniform backing for silicone, polyurethane and acrylic sealants, helps control sealant bead depth and shape, and prevents three-sided adhesion by creating a consistent bond surface. The compressible closed-cell structure ensures easy insertion and stable positioning in joints during construction and renovation work.

Advantages

The backing rod simplifies sealant application by maintaining a constant joint depth and supporting even bead formation. Its flexibility allows use in joints with slight irregularities while the foam compresses to fill gaps and reduce sealant consumption. Being non-adhesive to most sealants, the rod creates the correct backer profile so the sealant adheres only to the joint sides. The 6 m length on a roll reduces the need for frequent replacements on the job.

Suitable for

• Backfilling expansion and connection joints before applying silicone or polyurethane sealants
• Renovation tasks where controlled joint geometry and depth are required
• Sealing window, door and facade joints to improve sealant performance
• Indoor and outdoor applications with compressible joint fillers

Key specifications

• Material: flexible closed-cell polyethylene foam
• Diameter: 20 mm
• Length: 6 m (continuous roll)
• Compressibility: suitable for insertion and compression in joints
• Temperature resistance: compatible with common construction sealants (check sealant manufacturer limits)

How to use

Select a backing rod diameter slightly larger than the joint width to ensure a snug fit. Clean the joint of dust and loose material, then push the rod into the joint to the required depth using a blunt tool or a joint roller. Avoid stretching the rod during insertion; compress it gently to achieve the desired profile and maintain the recommended joint depth before applying sealant. Apply the sealant over the exposed rod and tool the joint to the required finish.

Usage recommendations

Use the backing rod with sealants compatible with closed-cell polyethylene foam. For best results, follow sealant manufacturer guidance on joint width-to-depth ratios and temperature limits. Replace sections that are damaged or contaminated and store the roll in a dry, shaded place to preserve material properties.