What this industry manufactures
Roofing sheet manufacturers produce corrugated and flat FRP sheets in standard profiles for industrial roofing, cladding and daylighting panels, along with ridge caps, flashing pieces and ancillary fittings used to complete a roof installation. Sheet widths and corrugation profiles are typically standardised to match common steel roofing profiles so FRP sheets can be installed alongside them.
Why GP Clear Resin is suitable
The site publishes GP Clear Resin as a general-purpose clear orthophthalic FRP route. Where a finished sheet has the documented roof-light, skylight or translucent-sheet requirement, review the separate Roof Light Sheet Grade Resin page and current product-specific TDS instead of treating a broad clear-resin search as an automatic substitute.
Required resin characteristics
- 01Low viscosity for fast, even spread across wide, thin sheet moulds
- 02Fast, consistent gel time to keep a continuous or semi-continuous production line moving
- 03Reliable room-temperature cure so sheets can be demoulded on a predictable schedule
- 04Adequate flexural strength for a thin laminate that will carry roof loads and wind uplift
- 05Batch consistency so sheet thickness and strength don't drift across a long production run
Manufacturing process
Roofing sheets are typically laminated over a corrugated mould bed: chopped strand mat is laid into the corrugation profile and wet out with resin catalysed by an MEKP hardener and cobalt octoate accelerator, worked through with a roller to remove air and achieve even thickness across every corrugation. Sheets cure at room temperature, often under a cover sheet to control surface finish, before being trimmed to length and stacked. High-volume producers run this as a semi-continuous line; smaller fabricators laminate sheet by sheet on fixed moulds.
Advantages
- Sub-8-minute gel time keeps sheet-by-sheet or continuous production moving efficiently
- Low viscosity reduces the labour needed to work resin evenly across wide corrugated moulds
- Non-accelerated cure lets fabricators adjust dosage for ambient workshop temperature through the day
- 225 kg drums suit the steady resin consumption of ongoing sheet production runs
Common products produced
- Corrugated FRP roofing sheets
- Flat FRP cladding panels
- Ridge caps and flashing accessories
- Industrial shed and warehouse roofing systems
Frequently asked questions
GP Clear Resin suits standard opaque roofing and cladding sheets. If the sheet needs to transmit daylight — a common requirement for translucent roof-light panels — Samrat Poly Resins' dedicated Roof Light Sheet Grade Resin is formulated specifically for that clarity requirement.
Roofing sheets are typically laminated with E-glass chopped strand mat, laid into the corrugation profile before resin is applied and worked through with a roller.
Roofing sheets are generally thin laminates, which is why a low-viscosity, fast-wetting resin like GP Clear Resin matters — there's less margin for dry patches than in a thicker structural laminate.
It is cured at room temperature with an MEKP catalyst (around 1.5%) and a cobalt octoate accelerator (around 0.4%), with dosage adjusted to suit ambient temperature and the pace of the production line.
Yes. FRP Polyester Pigment can be blended into GP Clear Resin before catalysing to produce coloured sheets, in addition to the standard clear or natural finish.
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