Sika Boom P #EN506, Sealing-Bonding Polyurethane Foams, Domochemica
Sika Boom 400 Fire resist polyurethane foam 750 ml - AMG Design
Amazon.com: SIKA Backer Rod, Gray, Polyethylene Foam, Closed Cell Used to Partially Fill deep Cracks or Joints Before applying sealant, 3/4" Diameter x 20' Long : Industrial & Scientific