Non Skinning Butyl Mastic Sealant
Bostik 40-317 High Velocity Acrylic Duct Sealant is designed for use on both low and high velocity heating and air conditioning ducts. It forms a tough, yet flexible seal, which prevents loss of internal pressure without the necessity of additional tape. It is both waterproof and flame retardant and has excellent adhesion to metal surfaces.
Where to Use