Technical Data Sheet (TDS)

Print version | Download TDS

KU 320

Universal acrylic adhesive for soft floor coverings (carpets, PVC)

Uses

BOSTIK KU 320 is an acrylic adhesive suitable for :
  • PVC/vinyl floor coverings: PVC sheeting and tiles, multi-layer floor coverings (compact-, polyester- and foam backed PVC), cork-PVC bonded coverings, homogeneous PVC, expanded vinyl, semi-flexible tiles
     
  • Textiles: needlepunch with or without backing, foam- or felt-backed carpets, Action Bac®, natural fibre floor coverings (Coir, sisal and sea grass)
     
  • Use onto subfloors of concrete, sand/cement screed, anhydrite screeds, smoothing underlayments, flooring grade plywood and timber
     
  • Interior use only.   

    

Benefits

  • Fast-setting adhesive with high initial tack
  • Easy to apply
  • Resistant to castor wheels
  • Long open time
  • Low solvent content
  • Suitable on heated floors   
  • Packaging available in 4 languages: Russian, Ukranian, Bulgarian and Romanian

Properties

Physical:

  • Type of adhesive: acrylic emulsion
  • Colour: cream
  • Specific gravity : approx 1.35 g/cm3
  • Non-flammable
  • Flashpoint: > 61°C
  • Waiting time: approx 5-10 minutes subject to ambient conditions
  • Working time: approx 35-45 minutes
  • Set to traffic: approx. 18-48 hours, subject to ambient conditions
  • Working temperature: preferably between +10°C and +30°C. Material and substrate temperature not below +10°C.
  • Full cure: after 48 hours
  • Freeze/Thaw stable down to –10°C

    

Consumption:

220-450 g/m²

Safety:

IMPORTANT: before embarking on any work involving BOSTIK KU 320 the separate Product Safety Data Sheet must be studied carefully by those carrying out the work.
Observe good hygiene in use. Avoid skin and eye contact.

Shelf life:

Up to 24 months in the original unopened container stored between +10°C and +30°C. Frost/thaw stable down to -10°C. In case of product freezing, put the bucket into the heated room (+25°C) for at least 24-48 hours. Mix well before application.

Back to top

Application

PREPARATION
 
Preparation should be in accordance with building standards. Subfloors must be sound, even, smooth, permanently dry and free from old adhesive residues, dust, grease or other contaminants.
When overlaying existing floor coverings, ensure that they are firmly bonded and clean.
Remove dirt, polish, oil and similar contaminating substances.
When further preparation of the subfloor is required, select suitable Bostik primers and Bostik smoothing and levelling compounds.
Very absorbent surfaces must be primed to prevent over absorption.
Anhydrite screeds as well as particleboards and plywood should be primed with solvent-based primer IMPREGLUE, several subsequent coats may be necessary (100-120 g/m²/coat).
Residual moisture content must be >3% for cement screeds and >0.5% for anhydrite screeds.
All surfaces must incorporate adequate damp proofing, if not, they should be primed with EPONAL 376 Moisture Vapour Barrier coating.
Always allow primers and underlayment to dry thoroughly before applying the adhesive.
 
APPLICATION
 
Apply an even coat over the whole area to be covered using a suitable notched trowel (depending on the porosity and roughness of the substrate).
 
Type of floor covering or specific substrate
Notched trowel to be used
(TKB standard)
Average consumption,
per m²
Very thin floor coverings with a smooth backing on all types of substrates or floor coverings with a smooth backing on non-porous substrates 
A4 or by roller
 
220 g
Floor coverings with a smooth backing
A2
280-300 g
Floor coverings with a slightly rough backing
B1
320-360 g
Floor coverings with a rough backing, coir, sisal, etc.
B2
400-450 g
 
 
Hints:
To minimise the effect of the adhesive serrations showing through thin floor coverings, apply with a trowel and flatten with a foam roller, taking care to pre-wet the roller with adhesive.
 
To avoid puddle formation, allow an appropriate open time (approx. 5 to 10 minutes, depending on temperature and humidity conditions ; substrate absorbency and type of floor covering) ; lay the floor covering whilst the adhesive remains tacky and receptive ; use a rubbing block and/or roller to expel trapped air and to ensure good transfer of the adhesive. Repeat after 30-40 minutes.
 
Do not weld the joints before the adhesive has had sufficient time to develop a good bond, normally 24 hours after installation.
 
REMARKS
- Tightly close all containers after use.
- Suitable for rubber floor coverings for which the manufacturer recommends an acrylic adhesive
 
CLEANING
Tools should be cleaned with warm water, preferably whilst the adhesive is still wet.

            

Back to top

Packaging

Presentation Bar code Bostik code
plastic bucket - 20 kg 3549210022442 041057
plastic bucket - 6 kg 3549210022459 041058

Index - Site Map - Terms of Use - Contact - About Bostik