When you buy silicone sealant come across super low prices , you must be vigilant. Low-priced oil-filled silicone sealants can cause quality problems in doors, windows, and curtain walls. So how do you identify oil-filled sealants? This article will provide a simple identification trick. Are you ready?
1. What is oil-filled silicone adhesive sealant?
In short, oil-filled sealant is silicone sealant filled with mineral oil. Mineral oil belongs to the saturated alkane petroleum distillation fraction and has poor compatibility with silicone sealants. It will gradually penetrate from the sealant, causing the sealant to crack and fail.
2. Hazards of oil-filled sealant
(1) Failure of door and window sealants, water leakage of doors and windows, poor air tightness and water tightness
(2) Failure of structural silicone adhesive sealant, poor adhesion, aging of seal strips, falling off of curtain walls and hollow glass, and penetration pollution on the surface of the exterior wall.
3. How to identify oil-filled silicone sealant caulks ?
The common method is the film test method. Just apply silicone sealant to a plastic film (PE material). Observe the sealant precipitation. When mineral oil penetrates into the plastic film, it will make the film uneven.
How to do it?
(1) Apply a “mouth”-shaped sealant on the flat plastic film, scrape it evenly, and observe after leaving it for 24 hours.
(2) If there is no scraper, apply a small amount of sealant on the plastic film, then cover it with another plastic film, press it until it is light and thin, and leave it for 24 hours to observe.
(3) After 24 hours, the sealant that shrinks the plastic film is silicone sealant with mineral oil added.
Have you learned how to identify silicone sealants?