SikaShield® W172 HDPE 1,6 mm

• CE marking and declaration of performance based on EN 13969:2004/A1:2006 Flexible sheets for waterproofing — Bitumen damp proof sheets including bitumen basement tanking sheets — Definitions and characteristics

12 months from date of production

The Product must be stored in original unopened and undamaged packaging in dry conditions and temperatures between +5 °C and +35 °C. Store in a vertical position. Do not stack pallets of the rolls on top of each other, or under pallets of any other materials during transport or storage. Always refer to packaging.

SYSTEM DESIGN

When designing the waterproofing system, make sure that the supporting structure has sufficient structural strength to support all new and existing layers of the system build-up.

SUBSTRATE CONDITION

The substrate surface must be uniform, firm, smooth and free of any sharp protrusion or burrs, clean, dry, free of grease, laitance, oil, dust and loosely adhering particles.

IMPORTANT

Unrolling at low temperatures

At low temperatures, the membrane becomes less flexible.

1. Be careful when unrolling to avoid damaging the membrane.

Seasonal symbol

Note: If a seasonal symbol is printed on the roll’s label, it is advisable to use the membrane during the indicated season.

Tackiness at high temperatures

Note: When laying the membrane at high temperatures, the integral adhesive will become 'tacky' and may restrict laying operations.

ALIGNMENT

IMPORTANT

Avoid coinciding joints

To avoid coinciding joints, lay the membranes parallel to one another. When applying on another bituminous membrane, make sure to straddle the overlaps of the previous layer.

1. Unroll the membrane.
2. Align the membrane.
3. Re-roll the membrane before application.

WET APPLICATION

Preconditions

Before the application of the adhesive mortar, the concrete substrate has been saturated with water.

The adhesive mortar SikaShield® W1 has been applied onto the substrate and is still wet.

1. Lay the membrane directly over the wet adhesive mortar.
2. At one end of the membrane, peel away part of the release liner from the membrane's underside.
3. Bond this end of the membrane to the adhesive and the substrate.
4. Continue to peel away the release liner sideways from the rest of the membrane's underside.
5. Bond the rest of the membrane to the adhesive and the substrate.
6. IMPORTANT If the ambient temperature is below +10 °C, seal the membrane overlaps by heating them with a gas torch or with hot air.Seal the membrane overlaps to avoid trapping the adhesive under the overlap, which can compromise the adhesion.
7. Roll the surface of the applied membrane with a roller from the centre to the edge to remove any air bubbles.
8. Push any excess of adhesive towards the opposite direction of the sealed side overlap.
9. Allow the adhesive mortar to cure for at least 24 hours at +25 °C before you start backfilling.

DETAILING

1. Use a sharp knife to cut in all details such as internal and external corners, upstands, vent pipes, drains, support metalwork etc.

Refer to the relevant method statement for further information on detailing.