Astm c920 federal tt s 001543 astm d 5893. This building required a sealant with high uv stability flexibility over a wide temperature range and the ability to accommodate extreme joint movement.
Silicone Sealants Urethane Sealants Ge Sealants Bostik
Urethane vs silicone sealant. The more common tests applied to silicones and urethane sealants are. Polyurethane is an organic material. A silicone based sealant carries a longer te rm warranty ranging from 2 to 4 times as many years as opposed to a common urethane warranty. Silicone remains flexible unlike the polyurethane. The effects of breakdown of silicone and polyurethane depend on the sealants chemical makeup. By choosing silicones with longer term warranties the life cycle coat of sealing your building could be greatly reduced.
Silicone is the best sealant for the colder temperatures. The cold does not affect application. Polyurethane however becomes even harder to apply and does not make a permanent bond when the temperatures are low. After careful consideration it was determined that a silicone sealant. The simple answer is this. A silicone based sealant carries a longer term warranty ranging from 10 to 20 years as opposed to the standard 5 year urethane warranty which is common in the industry.
The primary difference is at the chemical level. By choosing silicones with longer term warranties the life cycle cost of sealing your building could be greatly re duced. Example there is far better uv resistance in urethane sealants compared to what existed when the building was constructed. Silicone is an inorganic material. Uv stability and reversion. The testing standards required may vary by sealant chemistry silicone or urethane.
Why is sealant chemistry important. Building specifications often dictate that a sealant meet particular testing standards.
Gallery of Urethane Vs Silicone Sealant
