Based on this product's specifications, here are some alternatives and similar models
Radiator Stop Leak K2 T233 – 250 ml sealant for cooling systems
Summary description:
K2 Radiator Stop Leak T233 is a 250 ml sealant designed to stop minor leaks and seepage in vehicle cooling systems. The product is intended for use in radiators, heater cores and cooling circuit joints to reduce coolant loss and prevent overheating. Compatible with common automotive cooling fluids, it provides a temporary repair to restore system integrity until professional service.