Stelmax Clear Adhesive for Cat Flap Tunnel Extensions Stelmax Clear Contact Adhesive is a professional adhesive that we recommend for securely joining cat flap tunnel extensions when building longer tunnels for wall and deep-panel installations. It is particularly useful when several tunnel extensions are being joined together and you want the finished tunnel to remain securely assembled dur..

Stelmax White Adhesive for Pet Door Tunnel Extensions Stelmax White Contact Adhesive is a professional adhesive that we recommend for securely joining compatible cat flap and dog door tunnel extensions, particularly where several sections are required for a deep wall installation. The white formulation makes it particularly suitable for white pet doors and tunnel extensions, helping the bond..