A two part epoxy kit consisting of a liquid hardener and resin that once combined, are rolled onto concrete floors to prevent the transmission of moisture vapour from the concrete to the timber floor. 

Features

  • Protects floor coverings from slab moisture
  • Reduces problems with timber floors at a later stage
  • Fast curing
  • Only one application needed*
  • Developed for optimum bonding with the Liquid Nails Direct Stick adhesive
  • *A second coat may be required in case of very porous concrete or very high moisture levels in slab. Re-coat after curing and before 24 hours.

Where can this product be used?

     Preventing the transmission of moisture vapour:

  • Between concrete and timber overlays
  • Between concrete and plywood or particle board before the installation of the timber overlay
  • Between concrete and a cementitious overlay  

What materials is this product suitable for?

  • Concrete slabs

 

Please contact your store to confirm avaliability, as some stores may have a limited range.

Size 3.6L Kit
Colours Dark green when completely mixed
Technology Epoxy
Use Interior 

The following should only be used as a guide and the installer should apply all Australian Standards, BCA/NZBC requirements, and best practices.


        Preparation

  1. Selleys Liquid Nails VBS cures rapidly. Ensure that all your preparation is complete and the application area is clear and marked out before commencing mixing. Product is supplied ready to mix and use.
  2. All surfaces must be clean, dry and sound, free of voids, loose materials and contaminants (curing compounds, oil, grease, waxes, sealers, previous coatings or adhesives, etc). Complete removal of any contamination where it is suspected or evident.
  3. Surface preparation may be achieved by diamond grinding, shot blasting, sand blasting, and captive abrasive blast cleaning (Blastrac) or other suitable method. (Acid etching is not recommended, as the concrete has to be neutralised and dried afterwards.) Best preparation is to diamond grind the surface of the slab, as it enables the removal of high spots as well as laitance.
  4. Surface must be structurally sound and level. [Concrete slabs shall be in accordance with AS2870-1996 Residential Footings and Slabs Code.]
  5. For best results and optimum coverage concrete surfaces should have a finish equivalent to that obtained when using a steel trowel.
  6. Liquid Nails VBS can be applied if the concrete surface is dry and the slab has stabilised. To be stable, new concrete should be cured for at least 28 days or until the moisture content of the slab is less than 5.5%.
  7. For application, use a 5-6 mm mohair roller (or an applicator to minimise splatter) and cut in with a paint brush.

        Mixing for 20m2

  1. Keep VBS kits cool before mixing. Mark out approximately 20m² on floor.
  2. Pre-mix or thoroughly shake the hardener can before decanting then add the entire Blue hardener component to the Yellow resin component in the 4-litre can. Continue mixing for approximately two minutes. Once blended the mix is a uniform green colour. Streaks of yellow or blue in the mix will demonstrate insufficient mixing. Continue mixing until a uniform green colour is achieved.
  3. Once thoroughly mixed and streak free, immediately pour out the mixed product onto the floor over the area marked in such a way as to allow an easy consistent roll-out to give an even build.
  4. *A second coat may be required in case of very porous concrete or very high moisture levels in slab. Re-coat after curing and before 24 hours. If re-coating is required after 24 hours the floor will need to be lightly sanded and wiped over with MEK solvent to ensure adhesion of the next coat.

        Mixing for les than 20m2 - One quarter mix for 5m² areas or for cutting in

  1. The kit supplied has provision to easily mix one quarter of kit quantities by means of the separate mixing pail and stick.
  2. Mark-out area on concrete floor where VBS coating is to be applied.
  3. Thoroughly mix each part (Resin & Hardener) separately in its own can.
  4. Place mixing stick in the one litre empty pail provided, pour resin into the mix pail until it reaches the top of the yellow mark. Then add hardener to the top of the blue mark. Stir thoroughly until a uniform green colour with no streaks is achieved and apply.
  5. *A second coat may be required in case of very porous concrete or very high moisture levels in slab. Re-coat after curing and before 24 hours. If re-coating is required after 24 hours the floor will need to be lightly sanded and wiped over with MEK solvent to ensure adhesion of the next coat

Refer to the Installation Guide for more detailed information.

        Limitations:

  • Do not leave the mix in the can while brushing and rolling out or else application time will be shortened. By decanting the mix out onto the floor it is kept cool and allows a longer working time. 

 

 

  • This product cures very fast. For maximum working time, tip product onto concrete slab immediately after mixing. Do not leave in pail.
  • Two coats may be required on very porous concrete or if there is high moisture content in the slab.
  • To be effective as a vapour barrier coated surface should be even, glossy and streak free. If coating soaks away, gives dull patches, or if pinholes are visible, a second coat should be applied once the first coat has cured.
  • If dampness is suspected in a concrete slab, check by securely taping a 1m x 1m square of heavy duty plastic onto the slab, and leaving it for 24 hours.
  • Any visible dampness or discolouration of the slab under the patch on removal of the plastic is a warning sign.
  • If the slab is below grade, and there is a possibility of the water table being high enough to pressurise the concrete, perimeter drains would need to be installed.
  • If the slab is still green and high in water-of-placement, then allow the excess water to migrate out by providing good ventilation or by using a dehumidifier until the surface is dry.
  • Slabs known to be of or prone to, high moisture levels may require 2 applications of VBS.
  • After coating floors with VBS they should still be confirmed as having a moisture transmission rate of less than 15g/m²/24 hours before applying flooring overlay. It is recommended that this testing be done by the anhydrous calcium chloride method (ASTM F1869-98).
  • If vapour transmission of less than 15g/m²/24 hours is not achieved a second coat of VBS is recommended.

 

  • Clean up with acetone, MEK, epoxy or lacquer thinners.
  • Discard brushes and rollers after use. 

 

 


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