Choose foam sealant based on the use
The type of foam sealant you should buy depends on what you are going to use it for. For example, if you plan to seal around window and door sections or to fill voids, you can use most universal foam sealants. If the foam sealant is to be used outdoors or protect against moisture, you should instead choose a specially adapted foam sealant.
Expanding properties of foam sealant
The moment the foam leaves the nozzle, it expands rapidly. This makes it highly effective at sealing cavities. However, it can expand so powerfully that it moves beams and door frames, for example. Therefore, find out how much the foam sealant expands before using it. Once the foam sealant has hardened, you can cut off the excess foam with a knife.
Use foam sealant correctly
The disadvantage of foam sealant is that it has a porous structure that absorbs moisture, which can lead to moisture damage. However, if you cover the foam sealant and protect it from sunlight and moisture, it will seal perfectly. Since foam sealant is very sticky and tends to stick to just about everything, you should wear protective gloves, safety glasses, and protective clothing.
Frequently asked questions about Sealing foam
What is sealing foam?
Foam sealant consists of expanding foam made of polyurethane. It usually comes in a spray can or in a cartridge for use in caulking guns.
What is foam sealant used for?
Foam sealant is used for everything from insulation and sound dampening to filling cavities.
How much does foam sealant expand?
It varies. You can usually find the information you need on the packaging.
