Sikafloor®-329
(former MTop BC 329)
Elastic polyurethane floor coating
Sikafloor®-329 is a 2-part, solvent-free, elastic, self-levelling polyurethane base coat resin. It provides acoustic insulation to reduce footfall sound.
- Reduces footfall sound and contact noise
- Soft underfoot
- Good crack bridging ability
- Good mechanical resistance
- High elasticity
- Very low VOC emissions
Usage
Sikafloor®-329 is used as an elastic, self-smoothing base layer for Sika ComfortFloor® systems. Please note:- The Product may only be used by experienced professionals.
- The Product may only be used for interior applications.
Advantages
- Reduces footfall sound and contact noise
- Soft underfoot
- Good crack bridging ability
- Good mechanical resistance
- High elasticity
- Very low VOC emissions
Packaging
Container Part A | 10.4 kg |
Container Part B | 4.6 kg |
Container Part A + Part B | 15.0 kg |
Refer to the current price list for available packaging variations.
Colour
Part A | coloured |
Part B | light brown, transparent |
Cured colour | grey |
Product Details
Chemical Base
Polyurethane
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 +30 °C. Always refer to the packaging.
Refer to the current Safety Data Sheet for information on safe handling and storage.
Density
Part A | 0.85 kg/l |
Part B | 1.11 kg/l |
Mixed Product | 0.93 kg/l |
Solid content by mass
100 %
Solid content by volume
100 %
Shore A Hardness
Cured 7 days at +23 °C | 63 |
Tensile Strength
Cured 7 days at +23 °C and 50 % r.h. | 1.7 MPa |
Tensile adhesion strength
> 1.5 N/mm² (failure in concrete) | (EN 1542) |
Sound Insulation
Refer to the individual System Data Sheet.
Application
Mixing Ratio
Part A : Part B (by weight) | 100 : 44 |
Product Temperature
Maximum | +30 °C |
Minimum | +10 °C |
Ambient Air Temperature
Maximum | +30 °C |
Minimum | +10 °C |
Relative Air Humidity
Maximum | 75 % r.h. |
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 on the surface of the applied product.
Substrate Temperature
Maximum | +30 °C |
Minimum | +10 °C |
Substrate Moisture Content
Substrate | Test method | Moisture content |
Cementitious substrates | Calcium carbide method (CM method) | ≤ 4 % |
No rising moisture (ASTM D4263, polyethylene sheet)
Pot Life
+20 °C | 25 minutes |
Waiting Time / Overcoating
Before overcoating the Product, allow:
Temperature | Minimum | Maximum |
+15 °C | ~24 hours | ~3 days |
+20 °C | ~12 hours | ~48 hours |
+30 °C | ~8 hours | ~36 hours |
Note: Times are approximate and will be affected by changing ambient conditions, particularly temperature and relative humidity.
Consumption
Unfilled | 2.5 kg/m² |
EQUIPMENT
MIXING EQUIPMENT
Electric double-paddle mixer (> 700 W, 300 rpm to 400 rpm)
APPLICATION EQUIPMENT
Pin leveller
Trowels, including serrated
Spiked roller
SUBSTRATE QUALITY
IMPORTANT
Reduced service life due to incorrect treatment of cracks
The incorrect assessment and treatment of cracks may lead to a reduced service life and reflective cracking.
- For static cracks, ensure the width is suitable for overcoating with Sikafloor®-329.
- For dynamic cracks, ensure the movement is within the movement capacity of Sikafloor®-329.
TREATMENT OF JOINTS AND CRACKS
Construction joints and existing static surface cracks in substrate require pre-treating before full layer application. Use Sikadur® or Sikafloor® resins.
SUBSTRATE CONDITION
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.
Maximum slope gradient
Note: Do not apply on substrates with a slope > 1 % gradient.
SUBSTRATE PREPARATION
MECHANICAL SUBSTRATE PREPARATION
IMPORTANT
Surface defects due to voids in the substrate
Voids and blow holes in the substrate will weaken the surface and damage the covering Product if not repaired during the preparation process.
- Fully expose blow holes and voids during surface preparation to identify the required repairs.
- Remove weak cementitious substrates.
- Prepare cementitious substrates mechanically using abrasive blast cleaning, abrasive planing or scarifying equipment to remove cement laitance.
- Before applying thin layer resins, remove high spots by grinding.
- Before applying the Product, remove all dust, loose and friable material from the application surface with an industrial vacuuming equipment.
- Level the surface or fill cracks, blow holes and voids with products from the Sikafloor®, Sikadur® and Sikagard® range of materials.
For additional information on products for leveling and repairing defects, contact Sika® Technical Services.
SUBSTRATE PREPARATION OF NON-CEMENTITIOUS SUBSTRATES
For information on substrate preparation of non-cementitious substrates, contact Sika® Technical Services.
APPLICATION
IMPORTANT
Strictly follow installation procedures
Strictly follow installation procedures as defined in Method Statements, application manuals and working instructions which must always be adjusted to the actual site conditions.
IMPORTANT
Protect from moisture
After application, protect the Product from damp, condensation and direct water contact for at least 24 hours.
IMPORTANT
Foaming due to water contact of uncured material
Uncured material reacts with water of any kind, which leads to foaming.
- During the application, wear head and wrist bands to avoid sweat falling onto the uncured material.
IMPORTANT
No application on rising moisture
Do not apply on substrates with rising moisture.
IMPORTANT
Damaged finish due to heating with fossil fuel heaters
Fossil fuel heaters powered by gas, oil or paraffin produce large quantities of both carbon dioxide and water vapour, which may adversely affect the finish.
- For temporary heating, use only electrically powered warm air blower systems. Do not use gas, oil, paraffin or other fossil fuel heaters.
IMPORTANT
Indentations in resin due to high temperature combined with high point loading
Under certain conditions, underfloor heating or high ambient temperatures combined with high point loading may lead to indentations in the resin.
SELF-SMOOTHING WEARING LAYER
- Pour the mixed Product onto the substrate. For the consumption, refer to Application Information.
- Apply the Product evenly over the surface with a serrated trowel.
- To achieve a smooth finish, smooth the surface with the flat side of a trowel.
- Back roll the surface in two directions at right angles with a steel spike roller.
CLEANING OF TOOLS
Clean all tools and application equipment with Sika® Thinner C immediately after use. Hardened material can only be removed mechanically.