Bit 450

BIT 450 is a one-component sealant made from bitumen and polymers in solvent, characterized by its soft consistency which makes it easy to extrude and shape.

Product Description

BIT 450 may be used for filling joints, cracks and gaps of any size as, once hardened, it forms a plastic mass which is easily deformable. The bead of BIT 450 may be exposed to rain immediately after application, the product is not prone to leaching and does not dissolve in water. It also bonds to most substrates such as cementitious materials, wood, bricks, metals and many varieties of plastics. Thanks to the high bond and flexibility of the product, the bond is possible also in case of damp or wet substrate at the moment of application.

Field of Application

· Localized seals on old bitumen membranes.

· Overlaps on bitumen membranes.

· Fillets in bitumen membranes.

· Sealing air vents.

· Immediate seals in gaps between construction features on roofs and flat roofs.

· Collars around through pipe-work.

· Bonding bitumen tiles on roofs and flat roofs.

Product Details

Product identity

Consistency: thixotropic paste
Color: Black
Density (kg/m³): 1400
Viscosity (mPa.s): 1,300,000
Dry solids content (%): 90


BIT 450 is supplied in:
– 280ml cartridge


The consumption of BIT 450 depends on the application. Typical consumption is between 100 and 120 ml/mL.

Application Procedure

Preparation of substrate

Surfaces to be sealed must be dry, de-greased, solid and free of dust, loose parts, oil, grease, wax, old paintwork and rust on metal surfaces. We recommend applying masking tape along the edges of the joint in order to avoid the sealant seeping out of the joint and to get a more attractive finish.

Preparing the product

Ready to be used.

Applying the product

Insert the cartridge in an extrusion gun, cut off the tip of the cartridge, screw on the extrusion nozzle, trim the nozzle at an angle of 45° and according to the extruded width required and squeeze out the product in a continuous flow into the joint while trying to avoid air entering the joint. Immediately after applying the sealant, smooth over the surface before it hardens with a spatula wetted with soap and water. Remove the masking tape immediately after smoothing over the sealant