WEICON Steel-Filled Repair Stick

WEICON Steel-Filled Repair Stick is an epoxy-based industrial adhesive repair compound designed for fast repair, filling, and sealing on metal parts. Its steel-filled putty form can be kneaded by hand and shaped during application, enabling localized repairs on cracks, holes, or worn areas. Thanks to its fast-curing character, it can help reduce downtime in maintenance and repair processes. After curing, it turns dark grey and aims to form a solid filler line on metal surfaces.

Steel-filled epoxy structure and repair principle

This product is an industrial adhesive solution in putty form containing epoxy resin and steel filler. With the aim of strong adhesion to metal surfaces, it is used for tasks such as rebuilding broken edges, filling surface defects, and sealing leak points. With a suitability approach for use in drinking-water areas, it can also be considered for lines with hygiene requirements. The manufacturer is WEICON GmbH & Co. KG and the origin is Germany.

Working time, curing, and service planning

Since the working time is stated as 4 minutes for 25 g of material at 20 °C, it is important to have the workflow ready before application. At 20 °C, it develops hand-working strength in about 10 minutes and is intended to reach a level suitable for mechanical loading after 1 hour. As final strength is stated to develop within 24 hours at 20 °C, full-load operation should be planned accordingly. The application temperature is defined as +10 to +35 °C and the curing temperature as +6 to +40 °C; in field planning, it should be considered that the reaction may slow at lower temperatures.

Surface preparation and correct application steps

Ensuring surfaces are clean, dry, and degreased directly determines result quality for this type of industrial adhesive repair compound. On flat surfaces, roughening can increase mechanical grip; methods such as blasting can target a more stable bond line. A sufficient amount is cut from the stick and kneaded until a uniform color is achieved, then pressed onto the area to be repaired and shaped. Since a maximum gap-filling capability of 15 mm per single application is stated, layered application with intermediate curing should be preferred for larger volumes.

Strength values and sealing performance

The density of the cured mixture is stated as 2.0 g/cm³, supporting the steel-filled structure in forming a compact filler line. Compressive strength is given as 80 N/mm² according to DIN 53281-83 and Shore D hardness as 75, aiming for stable repair on areas exposed to mechanical impact. The average tensile shear strength on blasted steel is reported as 4.1 N/mm² according to DIN 53283, supporting a reliable industrial adhesive approach for metal bonding. Temperature resistance is stated as -50 °C to +120 °C, with short-term exposure up to +150 °C; therefore, service conditions should be evaluated separately for equipment near heat sources.

Industry applications and key advantages

In machine and facility maintenance, it can be used to seal cracks, holes, and leak points on pumps, housings, guards, and connection elements. In storage tanks and piping applications, it offers a practical industrial adhesive alternative for temporary or permanent repair of localized leaks. In metal constructions, it can be considered for rebuilding worn areas on railings and connection details, or reforming damaged threads with filler. Being suitable for equipment maintenance in the food, cosmetics, and pharmaceutical industries can help field teams proceed with a single product in repairs requiring fast intervention. It is stated that it can be stored for at least 18 months in unopened packaging at around +20 °C under dry conditions, and it should be protected from direct sunlight.