Sealants are divided into three broad categories, silicone, polyurethane and butyl.
- Silicones . These are not very stable over time and harden by detaching themselves in the joints due to UV rays, vibrations and the environment.
- Polyurethane . Ideal for campers; to be used for sealing window gaskets as they remain soft over time. SIKAFLEX example.
- Butyls . These are the TEROSTATs used for sealing the joints of the roof with the walls, for the roof windows. They come in strips and are called “profiled sealants”. Butyls are superior in quality to polyurethanes for stability and softness, maintaining flexibility and softness for decades. They absorb micro-dilatations and micro-settlements of the junctions of the camper which is continuously subject to vibrations due to movement on the road.