Tremco recommends that particle boards such as Chipboard are overlaid using SP101 6mm Plywood.
All cementitious underlayments require a primer when applying to a Calcium Sulphate substrate. A primer may also be required when applying to very porous concrete and sand cement screed.
If being applied over a surface damp proof membrane which has been left for too long before over coating.
SX600-NA is a fast drying high performance smoothing compound, which can take floor covering after 4 hours. Due to the superior technologies used the applications of use are much greater than that of SX300-NA. SX600-NA can be applied to firmly bonded vinyl tiles, wood substrates, ceramic tiles, metal etc. SX600-NA is the better option for use with domestic underfloor heating mats.