How can floors be installed onto old stairs in need of repair without using solvent based adhesives?

With UZIN NC 888 S and UZIN WK 222.

Old staircases not only look unpleasant but pose a safety risk. The quick setting feather coat UZIN NC 888 S makes stair repairs quick and easy. UZIN NC 888 S can be used on both horizontal and vertical surfaces. Holes in wood surfaces, screeds and concrete can be easily filled and unevenness fixed. The floor covering can then be installed after approx. 30 minutes (at 20 °C and 65 % relative humidity).

A strong contact adhesive is also required to install the floor covering and should achieve a permanent bond which is immediately ready for traffic. UZIN WK 222 is a water-based neoprene adhesive for all contact bonding common in building constructions. The product is solvent free and low emission, protecting the health of the installer.

Video:

Step by step guide:

Prime calcium sulphate screeds and plaster levelling compounds as well as strongly absorbent, sanding substrates with the universal primer UZIN PE 360 PLUS.

Smoothen major undulations or roughnesses of the surface with rapid drying levelling compound UZIN NC 888 S. Pour cold, clean water into a clean container. Sprinkle in the powder whilst mixing vigorously and mix until lump-free. Only mix as much mortar as can be applied within the working time of 5 - 10 minutes.

Apply the compound with the smoothing trowel uniformly up to the desired thickness onto the substrate. UZIN NC 888 S can be reworked or smoothed after approx. 15* minutes; the area is ready for covering after approx. 30 minutes (*at 20 °C and 65 % relative humidity).

Apply the solvent-free contact adhesive UZIN WK 222 with the enclosed yellow UZIN foam roller, coarse, and on the corners and edges use the UZIN silicon brush to apply adhesive uniformly thin onto the material to be bonded and the substrate. When applying the adhesive with the supplied 25 cm roller pre-spreading on a piece of chip board or the like is recommended in order to uniformly wet the roller.

Aerate both adhesive layers at least until they are almost non-tacky when touched. The covering side may alternatively be coated the day before. The second adhesive side is then aerated only until the surface is “slightly finger-dry”.

Put down the covering immediately or within the contact adhesion time, ensure correct fit and apply full area pressure, rub on or / and tap on. Subsequent correction is not possible. After 10 - 20 minutes* rub on again with force, especially seams and edges. (*at 20 °C and 65 % relative humidity).

UZIN NC 888 S is ideal for quick stair repairs. With the short open time, the immediate load-bearing ability, and the versatility, UZIN WK 222 is a winner for adhering floor coverings.

Ernst Wohlleb
Head of technical services UZIN

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UZIN NC 888 S Feather Coat

Rapid drying feather coat

now with better adhesion and smoother finish
from a ”feather-edge” up to 4 mm thickness
no primer required
extremely rapid drying
excellent surface finish
fine aggregate

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UZIN WK 222 Solvent-free contact adhesive

Water based neoprene adhesives for all types of constructional contact bonding

Superb rolling and brushing properties
Can be applied one day in advance
Long contact bonding time
High resistance to plasticisers
Solvent-free
Great coverage. Correct consumption obtained when applied with the yellow foam roller (pictured). Please note this is sold separately.

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