Sikafloor 377 is a 2-part polyurethane, coloured, crack-bridging, low viscosity, low moisture sensitive flooring resin. It provides a hard wearing, seamless, low maintenance, smooth, matt finish or slip resistant finish when broadcast with different aggregate grades. Varying thickness’s can be achieved from 2.0–5.0 mm. For medium - heavy wear conditions. Internal and external use.
Sikafloor 377 may only be used by experienced professionals.
Sikafloor 377 is a crack bridging, trafficable, wearing layer. As well as a slip resistant broadcast system. Ideal for car park decks, garage floors and bridges.
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Features & Benefits
- Two part polyurethane, coloured, crack-bridging, low viscosity, low moisture sensitive flooring resin.
- Provides a hard wearing, seamless, low maintenance, smooth, matt finish.
- May only be used by experienced professionals.
- Slip resistant finish when broadcast with different aggregate grades.
- For medium - heavy wear conditions.
- Internal and external use.
- For car park decks, garage floors and bridges.
- Good crack-bridging ability.
- Good mechanical resistance.
- Waterproof.
- Low moisture sensitive (no foaming or blistering).
- Varying thickness’s can be achieved from 2.0–5.0 mm.
- Different colour finishes available using a seal coat.
- Easy application.
- Low emissions.
- Low VOC emissions.
Product Information
Shelf Life: 12 months from date of production.
Density: 1.38 kg/l (density value at +23°C).
Application Temperature: 10°C min - 30°C max.
Application method: Trowel, spiked roller, squeegee.
Chemical Base: Polyurethane.
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 packaging.
Solids Content: 100 %.
Pot Life: 30 minutes at 20°C.
Curing Time:
- Before applying Sikafloor®-377 on Sikafloor®-156/161 allow:
- Allow a min 12 hrs/max 2 days at 20°C.
- Before applying Sikafloor®-377 on Sikafloor®-376 allow:
- Allow a min 15 hrs/max 1 day at 20°C.
- Before applying top coat on Sikafloor®-377 allow:
- Allow a min 12 hrs at 20°C.
See Product Data Sheet for further details.
Mixing Ratio: Part A : Part B = 81 : 19 (by weight).
Consumption: ~1.4 kg/m² /mm.
Equipment/Surface Preparation
EQUIPMENT:
Select the most appropriate equipment required for the project:
Substrate Preparation
- Abrasive blasting cleaning system.
- Planing machine.
- Scarifying machine.
- High pressure water blasting system.
- Other suitable equipment.
Mixing
- Electric single paddle mixer (300–400 rpm).
- Forced action / rotating pan / double paddle or trough type mixer (300–400 rpm).
- Scraper.
- Clean mixing containers.
Application
- Mixed material carrier.
- Pin leveller.
- Trowels.
- Spiked roller.
- Squeegee.
- Fleece rollers.
SURFACE PREPARATION:
Concrete and Cementitious Screeds
- Cementitious substrates (concrete / screed) 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 all contaminants such as dirt, oil, grease, coatings, laitance, surface treatments and loose friable material.
- Cementitious substrates must be prepared mechanically using suitable abrasive blast cleaning or planing / scarifying equipment to remove cement laitance and achieve an open textured gripping surface profile suitable for the product thickness.
- High spots can be removed by grinding.
- Weak cementitious substrates must be removed and surface defects such as blow holes and voids must be fully exposed.
- Repairs to the substrate, filling of cracks, blowholes/voids and surface levelling must be carried out using appropriate products from the Sikafloor®, Sikadur® and Sikagard® range of materials. Products must be cured before applying Sikafloor®-377.
- All dust, loose and friable material must be completely removed from all surfaces before application of the product and associated system products, preferably by vacuum extraction equipment.
Mixing
- Prior to mixing all parts, mix separately Part A (resin) using an electric single paddle mixer or other suitable equipment, mix liquid and all the coloured pigment until a uniform colour / mix has been achieved.
- Add Part B (hardener) to Part A and mix Part A + B continuously for 3 minutes until a uniformly coloured mix has been achieved.
- When Parts A and B have been mixed. Using a forced action / rotating pan / double paddle / trough type or other suitable equipment (free fall mixers must not be used). Gradually add the appropriate granulometry of dried quartz sand and if required Extender T. Mix for a further 2 minutes until a uniform mix has been achieved.
- To ensure thorough mixing pour materials into another container and mix again to achieve a smooth consistent mix.
- Excessive mixing must be avoided to minimise air entrainment.
- During the final mixing stage, scrape down the sides and bottom of the mixing container with a flat or straight edge trowel at least once to ensure complete mixing.
- Mix full units only. Mixing time for A + B + quartz sand = 5 minutes.
Application
- Strictly follow installation procedures as defined in method statements, application manuals and working instructions which must always be adjusted to the actual site conditions.
- Prior to application, confirm substrate moisture content, relative air humidity, dew point, substrate, air and product temperatures.
- If moisture content > 4% parts by weight, Sikafloor® EpoCem® may be applied as a Temporary Moisture Barrier (T.M.B.) system.
Primer
- Pour mixed Sikafloor® primer onto the prepared substrate and apply by brush, roller or squeegee then back roller in two directions at right angles to each other.
- Ensure a continuous, pore free coat covers the substrate.
- If necessary, apply two priming coats.
- Confirm waiting /overcoating time has been achieved before applying subsequent products.
- Refer to individual primer Product Data Sheet.
Self - Smoothing Wearing Layer
- Pour mixed Sikafloor®-377 onto prepared substrate and spread evenly using a suitable trowel or pin leveller to the required thickness.
- Spike roller immediately in two directions at right angles to each other to remove trowel marks, aid air release, ensure an even thickness and obtain the required surface finish.
Slip Resistant Broadcast Layer
- Pour mixed Sikafloor®-377 onto prepared substrate and spread evenly using a suitable trowel or pin leveller to the required thickness.
- Spike roller immediately in two directions at right angles to each other to aid air release and ensure an even thickness.
- After the appropriate waiting time, broadcast with quartz sand, at first lightly and then to excess to produce an even distribution surface profile.
- Allow Sikafloor®-377 to initially cure and remove all loose sand by vacuum extraction equipment.
Seal coat/Top Coat
- After waiting the appropriate overcoating time, pour the mixed material onto the slip resistant broadcast layer and spread evenly using a squeegee at the required consumption rate to completely encapsulate the sand.
- Then using a short-piled roller, back roller in two directions at right angles to each other.
- A seamless finish can be achieved if a ‘wet’ edge is maintained during application.
Cleaning Of Tools
- Clean all tools and application equipment with Thinner C immediately after use.
- Hardened material can only be removed mechanically.
Limitations
- A top / seal coat must be used on top of Sikafloor®- 377.
- After application, Sikafloor®-377 must be protected from damp, condensation and direct water contact (rain) for at least 24 hours.
- Construction joints and existing static surface cracks in substrate require pre-treating with a stripe coat by prefilling and levelling to seal against loss of material through the joint or cracks before full layer application. Use Sikadur® or Sikafloor® resins.
- The incorrect assessment and treatment of cracks may lead to a reduced service life and reflective surface cracking.
- If heating is required, do not use gas, oil, paraffin or other fossil fuel heaters, these produce large quantities of both CO² and H²O water vapour, which may adversely affect the finish. For heating use only electric powered warm air blower systems.
- Seal / Top coat consumption will vary depending on sand granulometry.
- Discard any material over the pot life recommendations.
- Do not apply on substrates with rising moisture.
- Do not apply to porous surfaces where significant moisture vapour transmission (out-gassing) will occur during application.
- Uneven application of the coating, resulting in variable coating layer thicknesses, may cause ‘gloss’ differences in the surface finish.
Health And Safety
Further information about hazardous influences and protection are detailed in individual health and safety data sheets.
Please contact Rawlins Paints' Technical Support Team on 0113 2455450 (option 2) or send a message to [email protected] for more information.
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