A comment about ratios:

Be sure to use the ratio printed on the hardener can. As an example, West System 207 hardener is advertised as a 3 to 1 ratio mix. However, on the can of 207 hardener it states: 3.3 to 1 ratio by volume and 3.7 to 1 ratio by weight.

Note that if you purchase West System resin and hardener in the U.K. and possibly Europe the ratios are different. West System products are made by another company, Wessex Resins I believe, for the U.K. and possibly European market. Just something to be aware of.

Glen in Baie-St-Paul.