What is a mix ratio?
The mix ratio for a two component epoxy is the correlation between the resin and catalyst, also known as the hardener or curing agent, required to realize a full cure of the system. Mix ratios are typically expressed by either weight or volume. In the examples below, we show some common and not so common mix ratios and provide detailed information of how much of each material a customer could expect to receive with different order sizes.
One to One (1:1)
Part A= 100%
Part B= 100%
If you were ordering a pint kit, this means you would be receiving one full pint of Part A and one full pint of Part B. After mixing Part A and Part B together, you will have 2 full pints of material.
Sizing options featuring a 1:1 mix ratio:
½ Pint Kit = 1 pint of material
Pint Kit= 2 pints of material
Quart Kit= 2 quarts of material
Gallon Kit= 2 gallons of material
5 Gallon Kit= 10 gallons of material
Two to One (2:1)
Part A= 100%
Part B= 50%
If you were ordering a pint kit, this means you would be receiving one full pint of Part A and half a pint of Part B. After mixing Part A and Part B together, you will have 1.5 pints of material.
Sizing options featuring a 2:1 mix ratio:
½ Pint Kit = 0.75 pint of material
Pint Kit= 1.5 pints of material
Quart Kit= 1.5 quarts of material
Gallon Kit= 1.5 gallons of material
5 Gallon Kit= 7.5 gallons of material
Four to One (4:1)
Part A= 100%
Part B= 25%
If you were ordering a pint kit, this means you would be receiving one full pint of Part A and a quarter pint of Part B. After mixing Part A and Part B together, you will have 1.25 pints of material.
Sizing options featuring a 4:1 mix ratio:
½ Pint Kit = 0.63 pint of material
Pint Kit= 1.25 pints of material
Quart Kit= 1.25 quarts of material
Gallon Kit= 1.25 gallons of material
5 Gallon Kit= 6.25 gallons of material
Ten to One (10:1)
Part A= 100%
Part B= 10%
If you were ordering a pint kit, this means you would be receiving one full pint of Part A and 1/10 of a pint of Part B. After mixing Part A and Part B together, you will have 1.1 full pints of material.
Sizing options featuring a 10:1 mix ratio:
½ Pint Kit= 0.6 pint of material
Pint Kit= 1.1 pints of material
Quart Kit= 1.1 quarts of material
Gallon Kit= 1.1 gallons of material
5 Gallon Kit= 5.5 gallons of material
Less Common Mixing Ratios
One to Four (1:4)
Part A= 25%
Part B= 100%
If you were ordering a pint kit, this means you would be receiving one full pint of Part B and a quarter pint of Part A. After mixing Part A and Part B together, you will have 1.25 pints of material.
Sizing options featuring a 1:4 mix ratio:
½ Pint Kit = 0.63 pint of material
Pint Kit= 1.25 pints of material
Quart Kit= 1.25 quarts of material
Gallon Kit= 1.25 gallons of material
5 Gallon Kit= 6.25 gallons of material
Mixing Ratio—Special Notice:
Master Bond recommends all its customers to be accurate and precise in mixing (by weight or volume) the two components of a two part epoxy system. Special precautions must be taken when very small quantities of the epoxy are being mixed (like a few grams), or when mixing a system with a difficult mix ratio (like 10:1). If the two components are not mixed thoroughly, or if there is a significant error in the mix ratio, the epoxy may cure soft and not develop all the required physical properties. Master Bond also recommends its customers to mix the two parts in a contamination free container for best results. It should be noted that for many two component systems involving difficult mix ratios, Master Bond offers applicators (like gun kit), wherein the user does not have to worry about measuring and mixing.
