Silicone & Polyurethane Sealants

Compare flexible sealants for weatherproofing, gap filling, and thermal movement applications in construction.

Contractor applying sealant to a concrete building joint

Buyer's Guide to Flexible Sealants for Construction

Choose flexible sealants by matching material properties to movement, chemical exposure, and weather conditions. Evaluate adhesion, cure time, and maintenance

Oct 5, 2026 · 9 min read

Close view of a window flashing joint with fresh sealant bead.

Silicone & Polyurethane Sealants

Silicone vs Polyurethane Sealants for Window Flashing

Choose silicone for wide, flexible joints and high-temperature exposure. Choose polyurethane when you need paintability, adhesion to mixed substrates, or a tighter

Oct 5, 2026 · 10 min read