Soudapack WST
Waterproofing Specialist formulation

Soudal Singapore product

Soudapack WST

A non-hardening, water-swelling paste for sealing the inside of pipe and cable penetrations. Use it with the required backing and Soudaplug ST finishing detail.

Product description

Inside cable and pipe penetrations

Soudapack WST remains flexible rather than curing hard, so cables can be changed later without losing the seal. Use the required backing depth, keep cables separated, fill without voids and finish the opening with Soudaplug ST.

Water-pressure performance

A correctly installed system resists up to 3 m of water pressure. This performance depends on the complete penetration detail, including the opening, cables or pipes, backing depth, fill and Soudaplug ST finish.

Preparation and applicationFollow the product instructions step by step.

Use the guidance and documents for your chosen product. Contact us if the English TDS or SDS you need is not listed below.

  1. 01

    Check that a water-swelling seal suits the surface, expected water pressure and available space, and that the design will confine it as it expands.

  2. 02

    Prepare sound, clean surfaces and remove dust, grease, laitance and loose material so the product is enclosed by solid substrate.

  3. 03

    Apply a continuous bead or fill the specified section without voids or trapped air, keeping the distance from the substrate edge stated in the technical data sheet.

  4. 04

    Install the backing, packing and closing detail shown in the system guidance. Without confinement, the product will expand but will not seal.

  5. 05

    Keep running water away until the product has reached the state described in the technical data sheet.

Product videosSee how the product is used.

Product documentsTechnical and safety documents.

Find the current technical and safety information available for this product, along with relevant test or approval documents.

Product documentsRequest the English TDS or SDS.

Contact the Singapore team for the correct technical, safety or supporting document for this product.

Request product documents

For the best resultMatch the product to the materials and application.

These practical points help you achieve a reliable result.

  • A water-swelling seal depends on confinement. Unrestrained product expands without developing a seal.
  • Choose the product for the expected water pressure, the available space and the complete system build-up.
  • If the detail will repeatedly dry and become wet again, check that the current documents cover that exposure.
  • Before starting, read the current technical and safety information for the product.
  • If the materials, coatings or site conditions are unfamiliar, test adhesion and compatibility on a prepared area first.

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Product selection help

Not sure whether this product fits the job?

Tell the local team what you are joining or sealing, the size of the job and where it will be used. Add photographs and any project requirements that matter.