SikaShield® P24 S 3 mm
SikaShield® P24 S 3 mm is an APP modified bituminous waterproofing membrane with a thickness of 3 mm. It is reinforced with a non-woven polyester fabric and is flexible at 0 °C. The top surface is coated with sand, which ensures the bond of the overlying layer. The underside of the product has a burn-off film for easy torch-application.
- Can be painted immediately after application
- Easy to install by torching method
- Fully bonded
- Good durability
- Good mechanical properties (tensile, tear, shear)
- Insulation panels can be bonded without special adhesives or mechanical fixings
- Decorative mineral granules
Usage
The Product is used as a waterproofing membrane for:- Balconies and terraces under a heavy protection layer such as tiles or gravel.
- Flat and sloping roofs under protective layers or ballast
- Car park decks
- Wet areas
- Basements and other below ground structures
- Horizontal reinforced concrete slabs, decks, podiums and protrusions
- Vertical reinforced concrete walls
- Base sheet in multi-layer systems
- The Product is not suitable for roofs permanently exposed to UV radiation.
Advantages
- Can be painted immediately after application
- Easy to install by torching method
- Fully bonded
- Good durability
- Good mechanical properties (tensile, tear, shear)
- Insulation panels can be bonded without special adhesives or mechanical fixings
- Decorative mineral granules
Packaging
| Roll width | 1.0 m |
| Roll length | 10.0 m |
Colour
Top surface | Sand |
Bottom surface | Polyethylene film |
Product Details
Composition
Composition | APP modified bitumen |
Reinforcing material | non-woven polyester fabric |
Shelf Life
12 months from date of production
Storage Conditions
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.
Effective Thickness
Effective thickness | 3.0 mm ± 0.2 mm |
Resistance to tear (nail shank)
Longitudinal (MD) | 150 N ± 45 N |
Transversal (CMD) | 150 N ± 45 N |
Joint Shear Resistance
Longitudinal | 500 N/50 mm ± 100 N/50 mm |
Transversal | 350 N/50 mm ± 70 N/50 mm |
Flexibility at Low Temperature
| At 0 °C | (EN 1109) |
Water Tightness
Method B: 24 hours at 60 kPa | Pass |
Application
Ambient Air Temperature
+5 °C min. / +40 °C max.
Relative Air Humidity
80 % max.
Substrate Temperature
+5 °C min. / +40 °C max.
SUBSTRATE QUALITY
SYSTEM DESIGN
Consider the following when designing the roof system:
The supporting structure must be of sufficient structural strength to support all new and existing layers of the roof build-up.
The complete roof system must be designed to withstand and be secured against wind uplift loadings.
The wind uplift resistance of the adhered roofing assembly is limited by the adhesion strength of the Product to the substrate.
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.
SUBSTRATE PREPARATION
PRIMING
Note: For information on selecting the appropriate primer, contact Sika technical service.
- Apply the appropriate Sika® primer with the required consumption onto the prepared dry surface.Note: Refer to the individual Product Data Sheet of the primer.
- Allow the primer to dry before membrane installation.
APPLICATION
IMPORTANT
Unrolling at low temperatures
At low temperatures, the membrane becomes less flexible.
- Be careful when unrolling to avoid damaging the membrane.
IMPORTANT
Damage through footwear
Footwear with spikes or sharp protrusions may puncture the membrane.
- Use footwear with a flat profile when walking over the membrane.
IMPORTANT
Damage through overheating
The polyester reinforcement melts at +260 °C. If it is damaged through overheating, the membrane becomes unusable.
- Keep moving the flame while torching to avoid overheating the membrane.
IMPORTANT
Reduced adhesion through insufficient heating
Make sure to heat the membrane sufficiently. If it is not sufficiently heated, the adhesion to the substrate, between layers or on the overlaps will be reduced.
- If the membrane does not adhere to other elements, lift and retorch the unbonded areas.
Note: If a seasonal symbol is printed on the roll’s label, it is advisable to use the membrane during the indicated season.
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.
- Unroll the membrane.
- Align the membrane.
- Re-roll the membrane before application.
MEMBRANE OVERLAPS
- Overlap the membranes by a minimum of 100 mm on the sides and 150 mm on each end.
- At the end overlap, cut off a corner measuring 100 mm per side at an angle of 45°.
- Weld the overlaps with great care until you see a trickle of melted mixture about 10 mm wide coming out along the line of the overlap.
TORCHING
- Heat the substrate and the backing film on the underside of the membrane with a gas burner. When the backing film starts to melt, the membrane is ready to stick.
- Roll the heated membrane forward and press it firmly against the substrate to bond it.
- Make sure a bead of melted bitumen is visible along the full length of the overlap sides and ends when laying.
Suitable substrates for torching
-
Concrete
-
Perlite screed
-
Bituminous membranes with a smooth surface
-
Coatings (check the compatibility)
-
Brick masonry
-
Cementitious screeds
DETAILING
- 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.