Sikaflex®-403 Tank & Silo - Elastic sealant
Verified by manufacturer 23 days ago
Elastic polyurethane sealant for tanks and silos.
Application
- Internal and external use.
- Designed for sealing steel containers built in sections such as enamelled steel or stainless steel tanks.
- Sealing domestic sewage systems.
Description
A 1-part, moisture-curing, elastic polyurethane sealant which is resistant to organic acids as found in liquid manure and silage liquids. The Product is used for sealing segmented and bolted tanks, concrete containers and floor joints and sewage systems.
Features and benefits:
- Resistant to domestic and municipal sewage, liquid manure and silage liquid.
- Good mechanical resistance.
- Very good resistance to specific chemicals.
- High modulus.
- Movement capability of ± 20 % (ISO 9047).
Approvals/ standards:
- Assessment of the joint sealant DIN EN 14188-2:2005-03, Sikaflex-403 Tank & Silo, SKZ, No. 224872/22.
- Foodstuff and migration behaviour EN 1186, EN 13130, CEN/TS 14234, ISEGA, No. 62008 U 24.
- General building regulations, DIBt, No. Z-74.62-212.
- UKCA and CE marking and declaration of performance based on EN 15651-4:2012 Sealants for non-structural use in joints in buildings and pedestrian walkways — Part 4: Sealants for pedestrian walkways.
General information
Color | Black Grey |
Material | Polyurethane |
Shape | Formless |
Uniclass | |
CAWS | R12/110 Below ground drainage system |
SKU Code | 707904, 707977 |
Specification data - Polyurethane (PUR) construction joint sealants
Material | One-part polyurethane. |
Colour | Black. Concrete grey. |
Density | To ISO 1183-1, ~1.25 kg/L. |
Shore A hardness | To ISO 868, ~40. Guidance for specification option: After 28 days. |
Tensile Modulus | To ISO 8339, ~0.75 N/mm². Guidance for specification option: At 100% elongation (+23 °C). Manufacturer guidanceSecant tensile modulus. |
Elongation at break | To ISO 37, ~750%. |
Movement | To ISO 9047, ±15%. Manufacturer guidanceMovement capability. |
Elastic recovery | To ISO 7389, ~80%. |
Tear resistance | To ISO 34, ~8.0 N/mm Manufacturer guidanceTear propagation resistance. |
Service temperature | Dry, -40 to +70°C; wet, ≤40°C (movement joints), ≤55°C (as overlap sealing in bolted steel tanks). |
Chemical resistance | Manufacturer guidanceConsult manufacturer for details. |
SAG | To ISO 7390, 0 mm. Guidance for specification option: 20 mm profile, 50°C. Manufacturer guidanceSag flow. |
Ambient temperature | 5–40°C. |
Temperature | 5–40°C. Guidance for specification option: Minimum +3°C above dew point temperature. Manufacturer guidanceSubstrate temperature. |
Backing | Use closed cell, polyethylene foam backing rod. Manufacturer guidanceBacking material. |
Curing time | ~2 mm/ 24 hours. Guidance for specification option:
Manufacturer guidanceCQP 049-2. |
Sustainability data
Contains Red List materials | No |
Country of material origin | Germany |
Country of product manufacture | Germany |
Material | Polyurethane |
A1-A3 (production stage) | Embodied carbon as defined in BS EN 15804 |
Normalised unit | 4.8 kg CO₂ eq/kg |
Declared unit | 4.79 kg CO₂ eq/kg Self-declared Lower emissions |
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