DISCONTINUED, PAST EXPIRATION. 600 ml Unipac (20.3 oz)
Sikaflex® -521UV incorporations the latest technology from Sika®, Hybrid. Sika® Hybrid Technology combines the tried and true experience in polyurethane sealants with silanes, which give great adhesion with little or no surface preparation. Sikaflex® -521UV is UV resistant, so it retains its color perfectly after years in the sun. White stays white, black does not chalk or streak.