Legalastic SP Swell

LEGALASTIC® SP SWELL is a single-component, hydrophilic polyurethane sealant that, when applied in concrete joints, expands in contact with water, effectively preventing its passage through the joint.

It is a quality, spray-on, one-component, permanently elastic polyurethane sealant that swells on contact with water. Cures under the influence of atmospheric moisture to form a low modulus sealant with excellent adhesive properties and weather resistance.