RED TEK 12a is an environmentally friendly, cost effective, hydrocarbon refrigerant that is 100% natural organic, non-ozone depleting and non-global warming. RED TEK 12a is a DIY alternative refrigerant that is formulated exclusively for use in vehicles originally equipped with R134a and R-12 refrigerant. RED TEK 12a offers improved cooling properties and performance versus R134a and R-12.