Sylmasta SylWrap Cast Iron Pipe Repair Kit is a pressure-off cast iron crack repair kit for 150mm drain, waste, soil, and supply pipe, plus gutters and rainwater stacks. It seals cracks and splits, then overwraps into a reinforced shell so crews can finish a permanent repair instead of cutting out and replacing cast iron.
Sylmasta SylWrap Cast Iron Pipe Repair Kit is a pressure-off crack repair kit for 150mm cast iron drain, waste, soil, and supply pipe, including gutters and rainwater stacks. Superfast Epoxy Putty, CrackSeal, and SylWrap HD seal the crack and overwrap into a reinforced shell so crews can restore the line in under 30 minutes without a full pipe replacement.
| Property | Value |
|---|---|
| Product code | SYL-CAST-150 |
| Pipe diameter | 150mm |
| SylWrap HD bandage | SYL633HD (150mm x 10.0m) |
| CrackSeal Sealant | 1 x 310ml cartridge |
| Initial seal materials | Superfast Epoxy Putty and CrackSeal Sealant |
| Max pressure (putty + SylWrap HD) | 30 bar / 435 psi (depends on leak; pressure off) |
| Working time (SylWrap HD) | 2–5 minutes (temperature dependent) |
| Functional cure | 30–45 minutes |
| Full cure | 24 hours |
| Max service temperature | 200°C / 390°F |
Product documents: Sylmasta SylWrap Cast Iron Pipe Repair Kit Technical Data Sheet
What cast iron pipe jobs is the Sylmasta SylWrap Cast Iron Pipe Repair Kit built for?
Sylmasta SylWrap Cast Iron Pipe Repair Kit is a specialist kit for sealing cracked cast iron pipework where there is no pressure. Typical work includes cast iron waste, drain, and soil pipe repairs; leaking rainwater stacks; cast iron gutter repair; and pipework in hospitals, office blocks, car parks, and other buildings where cast iron is common. Repairs can be completed in under 30 minutes on elbows, tees, saddles, and tight access sections as a flexible alternative to bulky clamps.
How do I use Sylmasta SylWrap Cast Iron Pipe Repair Kit with pressure off?
With the line depressurised, knead Superfast Epoxy Putty to a uniform colour and push it into small holes and cracks; it hardens in approximately 5 minutes. For longer cracks and splits, extrude CrackSeal Sealant from its 310ml cartridge with a standard sealant applicator (not supplied) until the crack is filled; CrackSeal sets almost instantly, even on wet surfaces. Wet the SylWrap HD bandage to activate the resin, wrap and smooth it over the seal, and allow a 2 to 5 minute work window with a functional cure in 30 to 45 minutes. Wear plastic gloves and follow the Safety Data Sheets.
When should I choose the SylWrap Cast Iron Pipe Repair Kit 150mm (SYL-CAST-150)?
Choose Sylmasta SylWrap Cast Iron Pipe Repair Kit (SYL-CAST-150) when you need a kit matched to 150mm cast iron pipe diameter, supplied with a SYL633HD (150mm x 10.0m) SylWrap HD bandage and one 310ml CrackSeal cartridge plus Superfast Epoxy Putty. The sister 100mm kit (SYL-CAST-100) covers 100mm pipe. Always match pipe diameter to the Cast Iron Kit TDS size chart. Other diameters such as 32-50mm, 68-75mm, and the multi-size case kit are listed on the TDS but are not currently live on this storefront.
Is Sylmasta SylWrap Cast Iron Pipe Repair Kit approved for drinking-water pipes?
Superfast Epoxy Putty and SylWrap HD in the Sylmasta SylWrap Cast Iron Pipe Repair Kit have WRAS Approval, so those components are certified as safe for repairs on pipes carrying drinking water. Always follow site hygiene rules and confirm the finished repair meets the local water-system specification before returning the line to service.
What pressure and temperature can a completed Cast Iron Kit repair handle?
With Superfast Epoxy Putty and SylWrap HD, maximum pressure resistance is 30 bar / 435 psi depending on the nature of the leak. The kit is for cracked cast iron pipework where there is no pressure during application. Maximum service temperature is 200°C / 390°F. SylWrap HD working time is 2 to 5 minutes depending on temperature, with a functional cure in 30 to 45 minutes and full cure in 24 hours. Actual values depend on pipe condition, crack size, and wrapping quality.
What is inside the 150mm Cast Iron Kit, and what is not supplied?
The 150mm Sylmasta SylWrap Cast Iron Pipe Repair Kit (SYL-CAST-150) contains Superfast Epoxy Putty, one 310ml CrackSeal Sealant cartridge, and one SYL633HD (150mm x 10.0m) SylWrap HD Pipe Repair Bandage. A standard sealant applicator for the CrackSeal cartridge is not supplied. White SylWrap HD is supplied as standard; black SylWrap HD can be requested for a closer match to black pipework. Store the kit cool and dry with the SylWrap HD pouch unopened for a shelf life of at least 24 months from manufacture.
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