Pack Sizes
0.5 kg (formulated for mixing with 2 kg Component A)
2.0 kg (formulated for mixing with 8 kg Component A)
Description & Uses
PU-PRO Polyurethane Varnish Hardener (Component B) is a specialized activator based on hydrophilic aliphatic polyisocyanate. When added to the water-based polyurethane varnish concentrate (Component A), it chemically reacts to ensure full cross-linking and form a high-strength protective film. VOC-free.
Intended Use: Exclusively designed for use as the second component (Component B) within the PU-PRO TM BAYRIS two-part varnish system. Formulated to create a topcoat protection over mineral substrates, microcement floors, decorative plasters, timber surfaces, as well as wet areas (shower zones, bathrooms) and EPOXY PRO TM BAYRIS polymer coatings. Delivers exceptional resistance to abrasion, staining, and household chemicals.
Technical Characteristics & Mix Ratios
The hardener reacts with the base to provide a clear, seamless, matte finish that is highly elastic, UV-resistant (non-yellowing), and offers superior adhesion. It preserves the original colour of the substrate and stands up to frequent wet cleaning.
Mixing Ratio: Components must be mixed in the strict ratio of A : B = 100 : 25 parts by weight (or 80% Component A to 20% Component B by mass).
Application & Instructions
Mixing Preparation: Add the full required amount of Hardener (Component B) to the container with Base (Component A). Thoroughly mix using a mechanical paddle mixer at low speed (250–350 rpm) for 5 minutes until completely homogenous.
Important! Do not use Component B as a standalone product. Do not use for any purpose other than specified. Never dilute or mix with other materials, water, or solvents. Strictly observe the recommended mixing ratio to ensure correct physical and mechanical performance of the cured film.
Pot Life: The mixed material (A+B) must be applied within 90–120 minutes (at +20°C). Higher ambient temperatures shorten pot life, whereas lower temperatures extend it.
Application & Storage Conditions: Apply at substrate and ambient temperatures between +8°C and +25°C, with relative humidity below 80%. Store in the original sealed container between +5°C and +35°C, protected from direct sunlight and heat sources. Protect from frost. Shelf life is 24 months from the manufacturing date.
Health & Safety Precautions
This product contains active aliphatic polyisocyanate and must be handled with appropriate care. Toxic if inhaled; may cause skin irritation, eye damage, allergic skin reactions, or respiratory distress.
Safety Measures:
- Always wear safety goggles/face shield, protective gloves, and appropriate respiratory protection (avoid breathing vapours).
- Keep tightly sealed in the original container out of reach of children.
- Read the safety instructions on the label carefully before use.
First Aid Measures:
- In case of eye contact: Rinse cautiously with water for several minutes. Remove contact lenses if present and easy to do, then continue rinsing.
- In case of skin contact: Wash the affected area thoroughly with soap and water.
- If inhaled: Remove person to fresh air and keep comfortable for breathing. Seek medical advice if symptoms persist.
- If swallowed: Seek immediate medical assistance.
Dispose of contents and empty packaging in accordance with local and national regulations. Do not discharge into drains, watercourses, or soil.
