CONCRETE FLOORINGS
JOINT SEALANT
BAUFLEX 35
One component poliurethane joint sealant
BAUFLEX 35 is a premixed, single-component polyurethane sealant, ideal for expansion, contraction, and construction joints in industrial floors. Suited for both internal and external use, it accommodates pedestrian or vehicle traffic and withstands mechanical stress, temperature changes, and UV exposure.
Intended Use
- Fills control (saw-cut) joints and pour-break joints inconcrete industrial floors, including warehouses, production halls, public buildings, parking zones
- Perfect for exposed outdoor surfaces and areas with thermal expansion movements
Key Features
- One-component, ready-to-use – no mixing required
- High elasticity – elongation up to 100%, elastic recovery ≥ 70%
- Exceptional adhesion to concrete
- High tear and aging resistanc– UV-stable polymer that retains elasticity and color
- Suitable for indoor and outdoor environments
Integration with Bautech Joint System
BAUFLEX 35 is designed to work within the Bautech joint system alongside BAUCORD backer rod and BAUFLEX Primer, ensuring optimal joint depth, adhesion, elasticity, and aging resistance for maximum performance and longevity.
Application Guidelines
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Prepare the joint – widen to specified width/depth after minimum 28 days curing, clean thoroughly and chamfer edges
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Insert BAUCORD backer rod approx. 25% larger than joint width to control sealant depth
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Prime joint edges with BAUFLEX Primer; let become tacky (~60 min)
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Apply BAUFLEX 35 from cartridge, fill joint fully to surface level; tool the sealant flush
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Remove masking tape before sealant skins over
Cure time – light traffic in ~24 h (≥ 15 °C), avoid water exposure for at least 8 h; full strength after 7 days
Packaging & Color
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600 ml cartridge ("sausage" tube) – for manual or pneumatic applicators
Standard color: Grey (also available in green)
Cleaning & Safety
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Clean tools and spills immediately with acetone; cured sealant requires mechanical removal
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Cured product is physiologically inert; uncured material may cause irritation or allergies - ensure good ventilation, use PPE, avoid skin contact. Rinse skin with acetone then soap; see TDS for safety instructions
Storage & Shelf Life
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6 months in original sealed packaging between +10 °C and +25 °C, protected from frost and direct sunlight
Technical data
| Property | Value |
|---|---|
| Elastic recovery | ≥ 70 % |
| Tensile modulus, transverse | ≤ 0.4 N/mm² at +23 °C; ≤ 0.6 N/mm² at –20 °C |
| Elongation at break | 100 % |
| Slump resistance | ≤ 3 mm |
| Volume change | ≤ 10 % |
| Usable temperature | +10 °C to +25 °C |
| Initial cure (light traffic) | ≥ 24 hours (at ≥ 15 °C) |
| Full cure | 7 days |
| Substrate moisture limit | < 4 % |
| UV / weather resistance | High |