SikaFlex-552 incorporates the latest technology Sika, Hybrid. Sida Hybrid Technology combines the tried and true experience in Polyurethane adhesives with silanes, which gives great adhesion with little or no surface preparation. SikaFlex-552 offers 30 minute tack free time, 500 psi tensile strength and great working characteristics. VOC free and non-yellowing. 10.14oz