GUIDE 14 · MAINTENANCE & REPAIR

Jobsite Stacking, Pressure Washing & PP Hot-Air Welding Repair for Tie-Rod Holes

Author: İdris YAĞMAHAN / Mimar (Architect) Published: 22/02/2026 Read Time: 8 minutes Category: Maintenance & Repair

Hot Air Plastic Welding Gun Repairing Polymer Formwork Panel

Quick Technical Specification

Verified Technical Reference

Surface Cleaning 150 – 200 bar high-pressure water blaster Chemical-free

Prohibited Tools Sharp metal scrapers, pickaxes or steel wire brushes

Plastic Hot Air Welder Handheld Hot-Air Plastic Welding Extruder Leister Triac

Welding Rod / Electrode Ø 4 – 5 mm Polypropylene (PP) Copolymer Welding Rod

Welding Temperature 230°C – 260°C nozzle extrusion temperature

Repair Duration Standard tie-rod hole fully restored and flush in 45 seconds

1. The Circular Mindset: Repairing Instead of Discarding
2. Daily Washing: 150-Bar Water Jet Protocol
3. 4-Step Tie-Rod Hole Hot-Air Welding Protocol

1. The Circular Mindset

Timber plywood delaminates once punctured. In contrast, 100% thermoplastic SerPlywood panels can be seamlessly welded and patched on site using portable hot-air welding equipment.

2. Hot-Air Welding Protocol

Using a handheld plastic welding torch (Leister Triac at 240°C) with an original Ø 4 mm polypropylene welding rod, technicians fill through-holes and screw penetrations in under 60 seconds. Shaving the bead flush restores pristine concrete forming quality.

Get On-Site Welding Equipment & Field Training

We provide genuine polypropylene welding rods and jobsite technical coaching for subcontractor crews.

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Frequently Asked Questions about Formwork Maintenance & Welding

Frequently Asked Questions

Common questions regarding board selection, reuse cycles, technical parameters, and global delivery.

How should high reuse cycle claims be evaluated?

Inquire about the exact test conditions, framing support, concrete mix, and jobsite handling practices. Any figure should be corroborated with real site records and laboratory testing rather than arbitrary claims.

Is there an unconditional reuse warranty?

Because formwork lifespan heavily depends on site workmanship, crane handling, and stripping procedures, warranty scopes and technical terms are specified conditionally in formal quotation contracts.

How should polymer formwork boards be cleaned?

Clean immediately after stripping using high-pressure water washing or plastic/wood scrapers. Avoid sharp metal scraping tools or heavy hammering to preserve the face texture.

Can damaged polymer boards be repaired on site?

Yes, surface gouges, deep scratches, or accidental drill holes can be easily repaired using hot-air polymer welding, welding rods, or polyurethane plugs, restoring a flush surface.

What precautions are needed during site storage?

Boards should be stacked horizontally on flat timber dunnage or original shipping pallets. For prolonged outdoor storage, covering with protective tarpaulins prevents excessive thermal buildup.

Can I test the product before placing a bulk order?

Yes, product sample kits and pilot test boards are provided for contractors, developers, and engineering firms. You can submit an inquiry via our Sample Request form.

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