Sikalastic®-870 BT
FAST-CURING, LIQUID APPLIED, PURE POLYUREA MEMBRANE WITH HIGH ACIDIC AND ALKALINE CHEMICAL RESISTANCE
Sikalastic®-870 BT is a two part, hot-sprayed, elastic, polyurea liquid applied membrane. It features a high acidic and alkaline chemical resistance and a very fast curing time.
- Good resistance to abrasion
- Good resistance to specific chemicals
- Very fast reactivity and curing time
- Impermeable to liquids
Usage
The Product is used as a:- Waterproof coating on concrete and cementitious screeds substrates
- The Product may only be used by experienced professionals.
- For applications other than in sewage systems contact Sika Technical Service.
Advantages
- Good resistance to abrasion
- Good resistance to specific chemicals
- Very fast reactivity and curing time
- Impermeable to liquids
Packaging
Part A (Isocyanate) | 200 kg drum (net) |
Part B (Polyamine) | 175 kg drum (net) |
Part C (Colour) | 15 kg container (net) |
Refer to the current price list for available packaging variations.
Colour
Part A | Clear–light yellowish liquid |
Part B | Medium brown liquid |
Part C | Toner grey liquid |
IMPORTANT
Discolouration and deterioration due to exposure to sunlight
When the product is exposed to direct sunlight there may be some discolouration and colour variation. Prolonged exposure to direct sunlight will cause deterioration.
- Always apply a UV resistant top coat if the Product will be left exposed to direct sunlight.
- Contact your Sika technical services for advice on selecting a UV resistant product.
Product Details
Chemical Base
Pure Polyurea
Shelf Life
Part A | 12 months from date of production |
Part B | 12 months from date of production |
Part C | 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 +30 °C. Protect from direct sunlight and frost. Always refer to packaging.
Refer to the current Safety Data Sheet for information on safe handling and storage.
Density
Part A | 1.05 kg/L |
Part B | 1.00 kg/L |
Part C | 1.05 kg/L |
Density values determined at +23 °C
Solid content by weight
100 %
Shore D Hardness
> 42 | (JIS K 6253-1) |
Resistance to Impact
No cracks or peels | (JIS A 6916) |
Tensile Strength
> 18 N/mm² | (JIS K 6251) |
Tear Strength
> 75 N/mm² | (JIS K 6252-1) |
Service Temperature
Performs in constant dry temperatures from -30 °C to +60 °C
Permeability to Water Vapour
0 g | (JIS A 1404) |
Application
Mixing Ratio
Part A : Part B + Part C = 1 : 1
Layer Thickness
> 2 mm
Product Temperature
Part A | +67 °C |
Part B + Part C | +53 °C |
Ambient Air Temperature
Maximum | +40 °C |
Minimum | - 5 °C |
Relative Air Humidity
< 85 %
Dew Point
Beware of condensation. The substrate and uncured applied product must be at least +3 °C above dew point to reduce the risk of condensation or blooming on the surface of the applied product. Low temperatures and high humidity conditions increase the probability of blooming.
Substrate Temperature
Maximum | +50 °C |
Minimum | 0 °C |
Curing Time
24 hours at +20 °C
Gel time
15 s at + 23 °C
Waiting Time / Overcoating
1–2 min at +23 °C
Consumption
1.10 kg/m² per mm thickness
EQUIPMENT
MIXING EQUIPMENT
Drum stirrer
APPLICATION EQUIPMENT
Air driven or electrical 2-component hot spray-equipment
SUBSTRATE QUALITY
Cementitious substrates must be structurally sound and of sufficient compressive strength (minimum 25 N/mm2) with a minimum tensile strength of 1.5 N/mm2.
Substrates must be clean, dry and free of contaminants such as dirt, oil, grease, coatings, laitance, surface treatments and loose friable material.
MIXING
IMPORTANT
Do not dilute with solvent or water.
- Pour all the container of Part C into the drum of Part B
- Thoroughly stir the single drum of coloured resin using a drum stirrer to obtain a uniform colour.
- Heat all three parts: Part A +67 °C : Part B + Part C +53°C.
- Dose and mix with the spray equipment making sure constant air pressure is maintained.
- Regularly check and control the accuracy of the mixing and dosage. The proportioning equipment must be capable of consistently supplying the correct pressure and heat.
APPLICATION
IMPORTANT
Ventilation in confined spaces
Always ensure good ventilation when applying the Product in a confined space.
IMPORTANT
No application on unprimed or unlevelled substrates
Only apply the Product on primed or levelled concrete and screed surfaces.
IMPORTANT
No application on rising moisture
Do not apply on substrates with rising moisture.
IMPORTANT
No application on out-gassing substrates
Important: Do not apply on porous surfaces where significant moisture vapour transmission (out-gassing) will occur during application.
The Product is applied with specific temperatures for each component. If the application equipment only has a single fixed temperature setting use +70 °C and conduct application trials before undertaking the full application.
- Apply the Product using air driven or electrical 2-component hot spray equipment.
CLEANING OF TOOLS
Clean all tools and application equipment with Sika® Thinner C immediately after use. The application equipment must be cleaned and filled with Mesamoll. Hardened material can only be removed mechanically.