Product Description

Primer PU Top is a two component solvent base primer used for polyurea waterproofing membranes. The primer is used as consolidating and adhesion promoter of the waterproofing material.

Field of Application

· For treating all types of surfaces before installing polyurethane waterproofing products.

· To improve bonding of waterproofing products.

· To provide uniform absorption of the substrate.

Product Details

Product identity

Consistency Comp. A: liquid
Consistency Comp. B: liquid
Color Comp. A: White
Color Comp. B: Light yellow
Density Comp. A (kg/m³): 1050
Density Comp. B (kg/m³): 1050
Viscosity Comp. A (mPa.s): 350
Viscosity Comp. B (mPa.s): 250
Dry solids content Comp. A (%): Dry solids content Comp. A (%): 75
Dry solids content Comp. B (%): 100


Primer PU Top is supplied in:
– 1 kg plastic can
– 5 kg plastic can
– 10 kg plastic can


The consumption of PRIMER PU TOP depends on the porosity and absorption of the surface. Typical consumption is between 100 and 200 gr/m².

Application Procedure

Preparation of substrate

The substrate should be dry, clean, and free from grease, oils, residual paint, and other loose material. Cracks in concrete surfaces must be repaired with Epo Inject.

Preparing the product

Primer PU Top is a polyurethane primer made up of two predosed components. To prepare the product, mix each of the two components for a few minutes and then pour component B into the container of component A. Mix the two components together with an electric mixer at low-speed to thoroughly blend them together, at least 3-4 minutes.

Applying the product

Apply an coat of Primer PU Top with a brush, roller or by spray. When used as an adhesion promoter for polyurethane finishing products, apply the finish approximately 8 hours after the primer. When used as an adhesion promoter on bitumen membranes, apply the waterproofing membrane 2-4 hours after the primer. When used as an adhesion promoter for bitumen membranes, apply the cementitious mortar approximately 2 hours after applying Primer PU Top.