Read all instructions prior to use. This will help you determine exactly how to protect your skin and eyes. You should always wear safety goggles, but specific products may recommend additional precautions. Use a dust mask or respirator as directed.
Make sure that you are working in a safe environment. If you are using polyurethane foam inside, provide adequate ventilation as directed.
Clean all surfaces that polyurethane foam will be applied to. You can wipe the area down with a dry rag, or if you are using a spray cleaner, be sure to wipe off the area with a dry rag after you have cleansed it with a wet one.
Shake can as directed. These instructions are for premixed polyurethane foam sold in a can.
Assemble the application apparatus. Remove package containing straw applicator from outside of can. Open the package and remove the thin straw. Attach straw to nozzle on can. You will hold can away from you when you apply foam.
Practice on a piece of scrap material to gauge amount of expansion of foam. You should apply the test polyurethane in the same conditons as you will be applying the polyurethane in your real construction project.
Squeeze trigger and apply small amounts of foam. If you are using polyurethane foam to seal around a window or door, wipe off any excess foam after applying. Allow expansion to occur before you apply more foam.
Spray additional foam if needed. Once polyurethane foam is applied, it will expand. After full expansion occurs, foam will dry and harden.
Cut or scrap off any hardened foam that is not desired from adjacent surfaces. You can use a pocket knife for this part of the process.
Things You Will Need
- Spray Polyurethane foam (premixed in can) Scrap material Goggles Dust mask or respirator Gloves Pocket knife
- Because polyurethane foam brands differ, you should always experiment before you use the foam on a restricted space so that you do not have too much foam in too small an area.