It expands by reacting to moisture. If you use a garden sprayer to dampen the surfaces first, it will expand quickly and form a crust. If you spray it into a dry area .
If you are referring to how long it will take for expanding foam insulation to set, it depends on the amount of foam insulation applied to the surface. Foam expands about times the initial volume applied, and it can be tack free 20 minutes after application. In any case, you.
If you're applying foam to dry wood or other dry surfaces, or working on a day with humidity, misting the area first will help the foam expand and cure faster. Did you know spray foam can even be used for concrete repair?.
Spray foam insulation is a great way to create tight, ventilation-free spaces that do not absorb water. Read the following blog to learn more!.
Fill openings approximately 50% full; the foam will expand to fill the space. Overfilling can buckle materials. If required, mist foam with spray water bottle to speed.
Rapid-setting expanding foam which can be painted and cut. Excellent it's a bit pricy, but it does the job its ment for " . Normally buy the sticky version but needed this for a different application, it came out the can, expanded and dried fast.