Application of PMMA Primer should begin with measuring the appropriate amount of primer. If using less than the amount contained in the package, pour the remaining portion into a container and seal tightly. Thoroughly mix the required amount of EUROSEAL PMMA PRIMER by adding (catalyst) in an amount of 2-5% (by weight). Mix for a minimum of 2 minutes using a slow-speed mixer (at temperatures below 10°C, mixing time is extended).