SikaShield® W1 IN
Cementitious adhesive for bonding wet applied bituminous membranes (Formerly SikaBit® W-1)
SikaShield® W1 IN is a 1-part polymer modified cementitious adhesive for bonding the SikaShield® W bituminous membranes on concrete substrates.
- Provides very good adhesion between the bituminous membrane and the concrete surface
- One-part system, requires only the addition of clean water
- Fast and easy installation
Usage
The product is used for adhering SikaShield® W membranes for waterproofing in:
- Basements and other below ground structures
- Horizontal reinforced concrete slabs, decks and podiums
- Vertical reinforced concrete walls
Packaging
30 kg bag
Advantages
- Provides very good adhesion between the bituminous membrane and the concrete surface
- One-part system, requires only the addition of clean water
- Fast and easy installation
- Very good mechanical strength
- Requires minimum surface preparation
- Can be applied on wet concrete
Colour
Red powder
SikaCim® is recommended for use in structural concrete, particularly for the following
Product Details
Chemical base
Polymer modified cement
Shelf life
12 months from date of production
Storage conditions
The product must be stored in original, unopened and undamaged sealed packaging in dry conditions at temperatures between +5 °C and +35 °C.
System structure
Layer | Product |
1. Adhesive | SikaShield® W1 IN |
2. Membrane | SikaShield® W159 ED 1,5 mm |
| 3. Protection | Suitable protection layer |
Application
Mixing ratio
water : powder = 0.33–0.37
~9.9–11.1 L of water per 30 kg bag
Fresh mortar density
~1.95 kg/L | (EN ISO 2811-1) |
Layer thickness
Minimum | 1 mm |
Maximum | 3 mm |
Ambient air temperature
+10 °C min. / +40 °C max.
Substrate temperature
+10 °C min. / +40 °C max.
Pot life
≥ 30 minutes (100 g mass, +25 °C, 65 % r.h)
Consumption
~2.0–3.0 kg/m2 (wet adhesive consumption per m2 of membrane)
Note: Consumption data is theoretical and does not allow for any additional material due to surface porosity, surface profile, variations in level, wastage or any other variations. Apply product to a test area to calculate the exact consumption for the specific substrate conditions and proposed application equipment.
EQUIPMENT
MIXING
- Electric single paddle mixer (< 400 rpm) with spiral paddle
APPLICATION
- Notched trowel
SUBSTRATE QUALITY
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. New concrete substrates must be at least 3 days old.
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.
MIXING
IMPORTANT
Over addition of water
Do not add more than prescribed water to the powder. Over addition affects the product’s finished mechanical performance.
- Pour the minimum amount of water into a suitable clean mixing container.
- While mixing gradually add the powder.
- Mix continuously for at least 3 minutes to achieve a uniform mix. If necessary, add more water up to the maximum amount to achieve the required consistency.
- Leave to stand for 1 minute.
- Mix for a further 1 minute.
Note: If mix has thickened due to delayed application, DO NOT dilute further with water. This should be discarded.
APPLICATION
- Saturate the substrate with clean water.
- Apply the mixed Product onto the substrate evenly using a 4–5 mm notched trowel.
- Immediately apply the SikaShield® W bituminous membrane while the adhesive is still wet.
Note: Allow for minimum 24 h curing (at +25 °C) of the SikaShield® W1 IN prior to backfilling the installed SikaShield® W waterproofing membrane.
CLEANING OF TOOLS
Clean all tools and application equipment with water immediately after use. Hardened material can only be removed mechanically.