Here's cut and paste from Enviro-safes web site. I also just called ES and talked with Zach in customer service. He stated that it is best NOT to pull a vacuum with the regular ES-12a with dye, and further, that the colder industrial product will work with or without pulling a vacuum. Moisture and air apparently are not issues when using this product.

Zach also mentioned that this is NOT a propane or butane product. (but is a Hydrocarbon) and that in 15 years of selling it, they have never had an incident of a fire or explosion. (they have heard the rumors)

From the Enviro Safe Web site: (Link: http://www.es-refrigerants.com/products/w/id/173/t/r134a-replacement-refrigerant-with-dye-can/details.asp)


Equivalent Weight Installation Chart

Download Chart (266 KB, PDF)


For best results, do NOT pull a vacuum on A/C system. (I added the orange color to highlight this statement)

(prices do not reflect shipping charges)

QUANTITY DISCOUNTS AVAILABLE!

Enviro-Safe™ Refrigerant with Dye is made of only the Most Pure, Quality, Refined ingredients available today.

Because Enviro-Safe™ Refrigerant with Dye is so efficient, you use UP TO 60% LESS! Please see EQUIVALENCIES below.

Each ounce of Enviro-Safe R134a Replacement Refrigerant with Dye is equivalent to 2.6 ounces of R134a and 3 ounces of R12.