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Surfaces must be clean, dry and free from dust, oil and grease.
The concrete screed must be firm and free of loose particles. Pekay
W598 may not be applied to "green" concrete, as the high alkalinity
reduces the bond strength of the adhesive.
Particular attention must be paid to ensuring that there is
no rising damp present, as this is the causeof failure in the
vast majority of cases. It is imperitive that the applicator
is thoughly aware of the relevant sections of the following Codes
of practise:
- The South African Bureau of Standards "Code of Practise 043
- The Laying of wood block floors".
- The National Building Research Institute - "Prevention of Rising
Damp" - N.B.R.I. Information Sheet D.I.S 59-234.
Pekay W598 is applied undiluted, by means of a notched trowel,
taking care to spread evenly over the surface. Apply to one surface
only preferably the screed. Stir well before use.
CAUTION: DO NOT APPLY ADHESIVE WHEN THE AMBIENT TEMPRATURE IS
BELOW 5°C.
Bonding should occur within zero to 5 minutes, depending on the
climatic conditions. Maximum bond strength is obtained using
this "wet stick" method. Lay the wood blocks, rough side down,
and apply sufficient pressure to unsure that the adhesive has
come into contact with the entire surface (it should squeeze
out slightly from the sides).
The adhesives will usually be dry within 12 - 16 hours, full
water resistance, however is only attained after one week.
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