Painting of building facades with highly‑elastic waterproofing paint

RELATED MATERIALS
- ISOMAT FLEXCOAT – Premium, elastic, waterproofing paint
- FLEX‑PRIMER – High‑quality, acrylic, water‑based primer
- DUROCRET – Polymer‑modified cement mortar
- UNICRET – Mortar for rendering and masonry
- UNICRET‑FAST – Fast‑setting, white repairing mortar
- PLANFIX – Polymer‑modified cement putty
- PLANFIX‑FINE – Polymer‑modified cement putty, extra fine‑grained
- ISOMASTIC‑A – Elastoplastic acrylic sealant

I. NATURE OF THE PROBLEM – REQUIREMENTS
Moisture due to rain is a common problem in external walls, especially where waterproof render was not used or poor quality paint has been applied. The problem is worse in north‑facing walls, cracked surfaces or walls near the sea. The paint used must be waterproof, strong, elastic and highly resistant to adverse weather conditions.

II. SOLUTION
ISOMAT FLEXCOAT is a high‑quality, highly elastic water‑paint based on elastomeric resins. It provides:
• Total waterproofing of walls against rain.
• High elasticity and ability to cover cracked surfaces.
• Vapor permeability, allowing the substrate to breathe.
• Strong bonding to the substrate with excellent coverage.
• Excellent washability.
• Aesthetically pleasing finish.
It is suitable for external or internal application, on new or old surfaces and on materials such as render, exposed concrete, brick and gypsum board.

III. APPLICATION

Substrate preparation
1. The substrate must be dry and free of grease, dust and loose materials.
2. Existing imperfections in render should be repaired with DUROCRET polymer‑modified cement mortar, UNICRET cement‑lime mortar or UNICRET‑FAST fast‑setting cement‑lime mortar.
3. Imperfections in exposed concrete should be repaired with PLANFIX or PLANFIX‑FINE polymer‑modified cement putties.
4. Cracks or joints should be widened to about 3 mm and filled with ISOMASTIC‑A acrylic sealant.
5. The surface should be primed with FLEX‑PRIMER (consumption 5–10 m²/kg depending on substrate absorptivity).
6. Once the primer has completely dried, application of ISOMAT FLEXCOAT can follow.

Application of ISOMAT FLEXCOAT
Stir ISOMAT FLEXCOAT thoroughly before use. Apply two coats by brush, roller or spray, undiluted or diluted with up to 5 % water. Apply the second coat after the first coat has completely dried. Coverage is about 8‑12 m²/l per coat.
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