The HydroHALT Sealing System & IVD-Merkblatt Nr. 3-1 Ausgabe Nov. 2014

In IVD-Merkblatt Nr. 3-1, the core focus is on the proper construction and location of movement joints and the appropriate selection and dimensional application of injectable sealant in indoor wet areas.

In general, IVD-Merkblatt Nr. 3-1 adopts the same proven principals promoted in Codes of Practice worldwide in respect of the necessity:

  • to provide movement joints in buildings to relieve built up stress
  • to ensure joint substrate compatibility and adhesion with sealants applied to seal such movement joints
  • to ensure the correct selection and dimensional application of sealant with a backer material to facilitate joint movement

The HydroHALT Sealing System has three key components:

  1. The HydroHALT strip
  2. Sealux-N Sealant Adhesive
  3. A Backer Material

The HydroHALT Sealing System combines the HydroHALT strip with Sealux-N and a backer material to flexibly seal the joint between shower trays and baths and the adjacent shower walls (see Figs 1-3 below).

Sealux-N conforms to EN 15651-1: F-EXT-INT-CC 25LM, EN 15651-2: G-CC 25LM, EN 15651-3: S XS2 Sealux-N is a neutral curing, low modulus, highly flexible, sanitary grade silicone adhesive.


Figure 1


Figure 2


Figure 3

The selection of Sealux-N sealant adhesive and its proper dimensional application in combination with a backer material is the key principal upon which the HydroHALT Sealing System is founded.

What makes the HydroHALT Sealing System revolutionary is Sealux have combined this proven principal with a wall membrane that has been specifically adapted for tenacious adhesion with Sealux-N.

The HydroHALT strip membrane prepares the wall substrate for an indirect tenacious engagement with Sealux-N and the adjacent shower tray or bath side wall. This is joint substrate preparation.

This joint design provides the benefit of allowing a relaxed separation of a lower portion of the HydroHALT strip from the wall surface which in combination with flexibility in the adjacent joint sealant created through the installation of the backer material, accommodate substantial joint expansion.

HydroHALT meets relevant recommendations of IVD-Merkblatt Nr. 3-1 Ausgabe Nov. 2014 in respect of the construction and sealing of shower tray and bath perimeter joints with injectable sealants.