DECOFLEX PU-40 is one-component polyurethane sealant for sealing dilatation joints in construction and for gluing construction and metal materials.

It can bond window frames, roofing tiles and floor tiles; also suitable for sealing in containers, cisterns, siloses and aluminium structures.

It is resistant to various weather conditions and can be painted over.


  • Excellent adhesion on most construction materials – concrete, brick, wood, aluminum, iron, stainless steel, copper and various plastics
  • Good characteristics
  • Quick-drying
  • Does not slump in vertical joint gaps
  • It can be painted over
  • Great hardness
  • Not corrosive
  • Resistant to all weather conditions
  • UV resistant
  • Shades: grey, white, black, brown


Packaging units:
Cartridge: 310 ml
Sausage: 600 ml

In a dry and cool storage place at temperatures between + 5°C and + 25°C and in the original/sealed package.

Fresh sealant and tools can be cleaned with alcohol.


The surface of the joint must be hard, clean, dust and fat free. Remove all separated and badly attached pieces. If you want joints to look nice, tape the edges with masking tape. Cut the cartridge at the top and screw on the nozzle which has to be cut according to the width of the joint and placed in the gun. During work interruption release the handle on the gun and pull the piston back. The sealant should be applied as evenly as possible. At the end, level the sealant with an appropriate instrument or a well soaped finger. Remove the masking tape before the sealant starts to harden.. The sealant must not grip the bottom of the joint, but only its sides. We can achieve this with the use of underlying materials, onto which the sealant has no adhesion (foamed polyethylene, polyurethane). The minimum joint width is 6 mm, the maximum 20 mm.


Adhesives and sealants

Decoanchor VE-2

Two-component vinyl-ester adhesive without styrene.

Decoanchor PE-1

Two-component, polyester-based adhesive.

Decoflex MS-40

One-component polyurethane sealant.

Decoflex PU-40

One-component polyurethane sealant.