Description
Outward angles, such as the leading edge of a shower upstand or a stud return, need a corner piece that wraps the other way. The ButylX Pro Tanking External Corner is a pre-formed 105mm x 105mm butyl unit shaped specifically for these projecting junctions, delivering a neat waterproof finish where a flat tape simply cannot fold to shape.
Its construction pairs a high-quality butyl rubber compound with a fleece-laminated upper surface and a self-adhesive butyl underside. That means strong bonding straight onto a prepared substrate with no primer step, while the fleece face bonds into your membrane or liquid tanking for a continuous seal.
Key features
- Pre-formed external corner for projecting wall and upstand angles
- Waterproof, flexible butyl body that accommodates minor movement
- Self-adhesive fixing for fast, secure installation
Part of the German-made ButylX Pro detailing system, it sits alongside the ButylX Pro Tanking Internal Corner so both inside and outside angles are fully detailed before finishing.
Full System Guarantee. ButylX Pro is a detailing system designed to be used with SUBSTRAT SealCoreX tanking membrane. The two must be installed together to create a complete, fully waterproof wetroom barrier, and using the matched Substrat components as one certified system is what qualifies your installation for the Substrat Full System Guarantee.




