''Because of the high coefficient of expansion, aluminium curtain-wall panels may fail if the design and installation does not look into the sealant's ability to cope with the movement and stresses that will occur. Thus, a high-quality sealant is always recommended,'' he emphasises.

''All the factors relating to joint movements have to be taken into account,'' the spokesman says, ''including panel size and colour, temperature range which affects the movement capability of elastomeric-type sealants, temperature and thermal cycling effects, and negative and positive wind pressures, besides the height of the building.

''Asmaco silicone sealants, one of the leading brands manufactured by Anchor Allied Factory Limited, play a vital role in various projects.''

Anchor Allied is one of the leading companies and pioneers in adhesive and sealants in the Gulf. It manufactures sealants for almost all applications including general-purpose, structural glazing, cladding, sanitary applications and for automobiles.

Asmaco 2640 and Asmaco 2670 silicone sealants of neutral grades are for the specific application in cladding and curtain-walls.

''The products have been put to stringent tests in the laboratory and are well accepted for these applications in various projects. Committed towards quality, the company offers products that are reasonably-priced, give the customers total satisfaction on applications, and after-sales service,'' he points out.

The details of specifications and samples are available on demand.