A self-levelling sealant that performs by repairing damaged joints – in this case at a busy airport.

A special self-levelling silicone joint sealant supplied by a.b.e. Construction Chemicals was specified for the repair of the ‘Delta’ apron at O.R. Tambo International Airport in Johannesburg.

a.b.e. Construction Chemicals is part of the Chryso Southern Africa Group. Sales & Segment Manager Samantha Ferreira says that Dow Corning 890 SL self-levelling joint sealant was applied to several thousand linear metres of damaged joints on the busy OR Tambo apron by MBR, concrete repair and refurbishment specialists.

“Dow Corning 890 SL sealant’s self-levelling characteristics make it ideal for sealing irregularly shaped joints and cracks by providing adequate adhesion to the interfaces, without the need for tooling,” she explains. “The sealant can withstand the joint opening to twice its width and closing to half its width, without adhesion loss. It requires no primer to bond to both concrete and asphalt. The sealant provides outstanding long-term performance in airport, bridge or highway joints in which extreme movement occurs.

“The sealant has also been widely applied for repairing joints in concrete roads,” Samantha concludes.