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As you’ll soon see, polyurethane, while being a heavy-duty adhesive, is also an organic substance that breaks down with constant UV exposure. Silicone, however, doesn’t, making generally a better option. In the post, read up on the details of these two types of adhesives and find out which one is best for your caulking project.
Polyurethane Caulk
Polyurethane is an organic compound produced by the reaction of glycol and an isocyanate. It is moisture- and corrosion-resistant. Consequently, polyurethane is useful as a heavy-duty adhesive, sealant, and caulk. Polyurethane caulk can be applied with a caulk gun. It is available in tubes that will fit the common caulking gun.
Not only is polyurethane caulk noted for its resistance to moisture, chemicals, and corrosion, it provides excellent flexibility. When joints expand and contract, polyurethane caulk is flexible enough to resist cracking and loosening. Polyurethane caulk is available in industrial strength which requires careful mixing of ingredients before it can be used. It is also available in a consumer-friendly ready-to-use form that requires mixing before it can be used.
Silicone Caulk
Silicone caulk is another kind of caulk, but it is different from polyurethane caulk. Unlike organic polyurethane caulk, silicone is inorganic. Being inorganic, it will not break down under prolonged exposure to the UV rays in sunlight and extremes in temperature. The lifespan of a joint sealed with silicone caulk is over twenty years, but a polyurethane-sealed joint will only last about five to ten years.
Silicone caulk is prized for its elasticity and it adheres well to any smooth surface except wood. It is ideal in bathrooms, kitchens, laundry rooms and any room with high moisture levels because silicone caulk is water resistant. You can also get a silicone caulk that contains a fungicide (for use in bathrooms and other areas not used in food preparation).
FIRE RETARDANT SILICONE SEALANT
ALSEAL Fire Retardant Silicone Sealant is a single-component, gun-grade, ready-to-use neutral silicone sealant formulated to form an elastomeric fire retardant seal in construction applications. It helps control the spread of fire, smoke and toxic fumes within a given area surrounded by firewalls for a period of up to four hours, depending on joint configuration.Get more news about Fireproof Silicone Sealant,you can vist our website!
Recommended for firestop sealing of interior and exterior building and construction movement joints or openings, where a fire rating of up to 4 hours is required. In addition, it can be used to seal fire retardant metal facade cladding, and mechanical, electrical, and plumbing applications like sealing openings or service penetrations through fire-rated ceiling, floor, or wall.
A selection of the very best quality, fully certified, passive fire protection mastic sealants from the biggest names in the mastic sealant fire protection industry such as Sika Everbuild, Otto Chemie, Dow Corning Geocel, Protecta ASF and Nullifire. Full certification details, technical specifications and fire protection capabilities are available on the technical datasheets of these fire protection mastic joint sealants.
fischer Fire Rated Silicone Sealant FFRS is a one part silicone based sealant that can provide up to 5 hours fire resistance when used in construction joints. Tested to BS 476 & EN1366-4 it provides primerless adhesion to a wide range of porous and non-porous substrates such as glass, anodised and multi-finished aluminum. steel, st.steel. rigid PVC and concrete.