SikaShield® P24 S IN 3 mm
SikaShield® P24 S IN 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 -2 °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.
- Fully bonded
- Long term flexibility
- Excellent water tightness
- Good abrasion resistance
- Very good mechanical properties (tensile, tear, shear)
- Can be handled in warmer temperatures easily
- Low water absorption
- Easy to install by torching method
- Capable of withstanding thermal and structural stresses
- Good durability and performance under long term ageing
- Sand surfacing creates strong bond with screed or structural concrete
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
- Bridge decks under asphalt wearing layer
- Underpass and subways
- Basements and other below ground structures
- Horizontal reinforced concrete slabs, decks, podiums and protrusions
- Vertical reinforced concrete walls
- Top sheet in multi-layer systems
- The product is not suitable for roofs permanently exposed to UV radiation. Protect membrane with a suitable protection layer.
Advantages
- Fully bonded
- Long term flexibility
- Excellent water tightness
- Good abrasion resistance
- Very good mechanical properties (tensile, tear, shear)
- Can be handled in warmer temperatures easily
- Low water absorption
- Easy to install by torching method
- Capable of withstanding thermal and structural stresses
- Good durability and performance under long term ageing
- Sand surfacing creates strong bond with screed or structural concrete
Packaging
Roll width | 1.0 m |
Roll length | 10.0 m |
Rolls are wrapped on cardboard coil to reduce transit and storage damage.
Colour
Top surface | Sand / Grey |
Bottom surface | Polyethylene film / Black |
Product Details
Chemical base
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.
Thickness
3 mm (+0.3 mm / -0.2 mm) | (EN 1849-1) |
Resistance to impact
≥ 600 mm | (EN 12691) |
Resistance to static load
≥ 10 kg (Method A) | (EN 12730) |
Tensile strength
Longitudinal (MD) | (650 ± 150) N/50mm |
Transversal (CMD) | (450 ± 150) N/50mm |
Elongation
Longitudinal (MD) | (40 ± 10) % |
Transversal (CMD) | (40 ± 10) % |
Tear strength
Longitudinal (MD) | (300 ± 100) N |
Transversal (CMD) | (200 ± 100) N |
Joint shear resistance
Longitudinal | (500 ± 125) N/50mm |
Transversal | (300 ± 90) N/50mm |
Flexibility at low temperature
≤ -2 °C | (EN 1109) |
Softening point
≥ 150 °C | (ASTM D36) |
Flow resistance
No flow at +120 °C, 2 h | (EN 1110) |
Water tightness
≥ 60 kPa (Method B, 24 h) | (EN 1928) |
Application
Ambient air temperature
+10 °C min. / +40 °C max.
Substrate temperature
+10 °C min. / +40 °C max.
Substrate moisture content
< 6 %
APPLICATION INSTRUCTIONS
Strictly follow installation procedures as defined in method statements, application manuals and working instructions which must always be adjusted to the actual site conditions.
SUBSTRATE QUALITY
SYSTEM DESIGN
Consider the following when designing the waterproofing system:
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The supporting structure must be of sufficient structural strength to support all new and existing layers of the roof and basement build-up.
-
The membrane system for underground works must be considered for protection before structural concrete works.
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The complete roof system must be designed to withstand and be secured against wind uplift loadings.
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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
PREPARATION
New concrete should be cured for at least 28 days and should have a pull off strength ≥ 1.5 N/mm2. Cementitious or mineral based substrates must be prepared mechanically to remove cement laitance and to achieve an open textured surface. Loose friable material and weak concrete must be completely removed and surface defects such as blowholes and voids must be fully exposed. The concrete must be carefully assessed for moisture content, air entrapment, and surface finish prior to any primer application.
PRIMING
Primer selection
Note: For information on selecting the appropriate primer, contact Sika Technical Service.
- Apply the appropriate SikaShield® 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 re-torch the unbonded areas.
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 with staggering. When applying on another bituminous membrane, make sure to stagger 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 80-100 mm on the sides and 150 mm on each end.
- At the end overlap, cut off a corner measuring 80-100 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
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Concrete
-
Bituminous membranes with a smooth surface
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Coatings (check the compatibility)
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Brick masonry
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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.