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sealants are used when a seam, joint, gap or junction needs to be closed with a neat connection line. The category includes acrylic, silicone, fire-resistant, installation and adhesive sealants for repair, finishing, water-contact areas, window blocks, facades and special tasks.

What sealants are used for
  • filling seams, joints, gaps and technological openings between construction elements;

  • forming a neat seam around window, door, sanitary and decorative assemblies;

  • reducing the risk of moisture, dust or drafts entering through loose junctions;

  • use indoors, outdoors, in water-contact areas or temperature-loaded zones depending on material type;

  • combining sealing with fixing when an adhesive sealant is selected.

How to choose a sealant
  • for repair and finishing seams, check acrylic sealants with the required colour and paintability;

  • for bathrooms, showers, kitchens and water-contact areas, choose sanitary or silicone materials by surface compatibility;

  • for window, facade and thermal-insulation installation seams, check A or B series materials depending on the application side;

  • for fireplaces, stoves and hot structures, use a special fire-resistant sealant with the appropriate temperature range;

  • when an element must be bonded and the seam closed at the same time, check adhesive sealants.

What to check before application
  • surfaces should be dry, solid, level and cleaned of dust, dirt, grease, old coatings and poorly bonded particles;

  • porous or weakened substrates should be prepared and primed according to the specific product recommendations;

  • before work, check sealant compatibility with the substrate, application temperature and seam operating conditions;

  • fill the seam evenly, then shape the required geometry with a spatula or seam tool;

  • before load or further finishing, follow the drying time stated for the selected material.

Outdoors, use sealants whose descriptions state exterior use. Acrylic A is the outer layer of a window installation joint: it is vapour-permeable, lets moisture out of the foam, resists weathering and can be painted along with the facade. Universal silicone shields installation foam from UV, takes up to 20% movement and suits glass, downpipes and small roofing jobs, though it cannot be painted. Universal acrylic has improved water resistance and fills joints in external wall insulation systems and cracks in mineral substrates before painting; facade expansion joints call for silicone.

Which sealant works outdoors in winter? Acrylic A, which can be applied from -25 °C. Universal silicone is applied from +5 °C and Universal acrylic from +10 °C.

Can sealant on a facade be painted? Acrylic A and Universal acrylic take paint; silicone joints do not.

How long does an exterior joint last? Sealant A is rated for 20 years of service. All three sealants are rated for service from -40 °C.