Why movement joints need the right sealant

Buildings move. Temperature changes, loads and settlement all open and close joints over time, and a sealant has to accommodate that movement without failing.

Match the sealant to the joint

Each sealant has a movement capability and suits particular substrates. Polyurethane, silicone and fire-resistant grades are made for different jobs, so check the data sheet against the joint you have.

Form the joint properly

• Keep the width-to-depth ratio recommended for the product.
• Use a backer rod so the sealant bonds on two faces only.
• Clean the surfaces and use a primer where the data sheet calls for one.

Fire-rated joints

Where a joint passes through a fire-rated element, use a sealant rated for that purpose and follow the tested joint detail.

Not sure which sealant suits a particular joint? Send us the details and our team will help you choose.