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Sikaflex®-403 Tank & Silo - Elastic sealant

Verified by manufacturer 2 days ago

Sika Limited

Elastic polyurethane sealant for tanks and silos.

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+44 (0)1707 394444 Website

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

Pr_30_31_76_65 Polyurethane (PUR) construction joint sealantsPrimary

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 guidance

Secant tensile modulus.

Elongation at break

To ISO 37, ~750%.

Movement

To ISO 9047, ±15%.

Manufacturer guidance

Movement capability.

Elastic recovery

To ISO 7389, ~80%.

Tear resistance

To ISO 34, ~8.0 N/mm

Manufacturer guidance

Tear 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 guidance

Consult manufacturer for details.

SAG

To ISO 7390, 0 mm.

Guidance for specification option:

20 mm profile, 50°C.

Manufacturer guidance

Sag flow.

Ambient temperature

5–40°C.

Temperature

5–40°C.

Guidance for specification option:

Minimum +3°C above dew point temperature.

Manufacturer guidance

Substrate temperature.

Backing

Use closed cell, polyethylene foam backing rod.

Manufacturer guidance

Backing material.

Curing time

~2 mm/ 24 hours.

Guidance for specification option:

  • 23°C/ 50% r.h.
  • Skin time (CQP 019-1): ~5 hours - 23°C/ 50% r.h.

Manufacturer guidance

CQP 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)

Normalised unit

4.8 kg CO₂ eq/kg

Declared unit

4.79 kg CO₂ eq/kg

Self-declared

Lower emissions

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