How do I choose a suitable alternative for silicone sealant?-TENGYU CHEMICAL (LONGKOU) CO., LTD

How do I choose a suitable alternative for silicone sealant?

It is important to ask the following questions before deciding to substitute a silicone sealant:

Will it be applied for structural glazing?
Will the alternative sealant need to be weather / UV exposed?
What is the expected movement capacity required?
Will the finishing be covered or not?

How do I repair a failed silicone sealant joint without silicone availability?

There are a couple of ways to repair a failed silicone sealant joint with polyurethane technology. However, since polyurethanes will not develop adhesion to cured silicones, the existing silicone sealant would need to be fully removed. If the joint is located within a porous substrate, this substrate will likely need some mechanical abrasion to remove as much of the existing sealant as possible. If the sealant joint is located in a non-porous substrate, the sealant should be cut out as close as possible to the bond line. Sanding with a fine grit sandpaper may be needed to remove any silicone that is left within the joint.

When applying the new polyurethane sealant joint, it is recommended that the polyurethane extend ¼ inch onto the substrate on either side of the joint. This will ensure the material is bonding to fresh substrate.

Can I use Polyurethane (PU) Sealants?

Polyurethane sealants are a popular choice for both new and renovation projects. Polyurethane sealants are mostly employed in horizontal joints or non-sagging vertical applications and are available in single and multi-component formulas. When considering using a PU sealant as a substitute to Silicone, it is important that you consult with an industry expert who can advise on the correct solution.

What are Hybrid Sealants? Can they be used instead of standard silicone sealants?

Hybrid sealants combine the benefits of high-performance polyurethane and silicone chemistry. These technologies combine to create a hybrid sealant that combines the durability and paintability of a polyurethane sealant, with the weathering and UV resistance of a silicone sealant. Hybrid sealants are a great option when selecting an alternative to standard silicone sealants.

How do I choose a suitable alternative for silicone sealant?