Quick facts
- Catalogue code
- SPR 301 DMC
- Compound form
- Dough (bulk, dough-form compound)
- Process
- Hot-mould and compression moulding
- Specification
- Shared with SPR 301 SMC; a separate product
DMC in one paragraph
Dough moulding compound is a bulk, dough-like mix of resin, filler and short reinforcement, charged into a heated mould and pressed into shape. It suits compact, thick or detailed parts that a sheet compound would struggle to fill. SPR 301 DMC is the isophthalic resin the catalogue lists for hot-mould DMC processing and compression-moulded composite components.
Reading the published values
The catalogue describes SPR 301 DMC as a separate manufactured product from the SMC resin that shares the same typical specification: 800–1,400 cPs at 25 °C, a gel time of 12–18 minutes at 25 °C, a specific gravity of 1.10–1.14 and 31–36% styrene by weight, supplied non-accelerated with a reference cure of MEKP 1.5% and cobalt octoate 0.4%, each added separately.
Limitations and alternatives
A moulded part’s properties come from the compound and the press cycle, not the resin alone. DMC resins exist in three chemistries in the range: the orthophthalic DMC/SMC Resin (SPR 201), this isophthalic grade and the terephthalic SPR 401 DMC, which has its own specification. The comparison guide on DMC resins by chemistry sets them side by side.
Source, roles and the Nepal enquiry path
The values on this page are the typical specification printed for SPR 301 DMC in the supplier’s 2026 product catalogue. Samrat Poly Resins has since published a Technical Data Sheet for this grade, linked from the product page; its figures and the catalogue’s agree, and the catalogue is the source named beside every figure here.
Samrat Poly Resins, India manufactures the grade and issues its technical information. Samrat FRP Traders is the Nepal supplier and importer and handles enquiries; price, packaging, lead time and stock in Nepal are confirmed on enquiry.
Key properties
| Property | Typical value |
|---|---|
| Appearance | Clear, pale-yellow to light-amber liquid |
| Viscosity | 800–1,400 cPs at 25 °C |
| Gel time | 12–18 minutes at 25 °C |
| Specific gravity | 1.10–1.14 |
| Styrene content | 31–36% by weight |
| Supply condition | Non-accelerated |
| Reference cure system | MEKP 1.5% + Cobalt Octoate 0.4% — added separately during use |
Source: Samrat Poly Resins, India — product catalogue, 2026 edition (typical specification). Typical values describe the grade; they are not batch guarantees or acceptance limits.
Frequently asked questions
Why does it have the same values as the SMC resin?
The catalogue publishes one shared typical specification for the two; they remain separately manufactured products.
Is DMC the same as BMC?
The two terms are often used for similar bulk moulding compounds. This site follows the catalogue, which calls the product DMC — dough moulding compound.
Which DMC resin should I choose?
Choose the chemistry the compound requires: orthophthalic, isophthalic or terephthalic. The comparison guide explains the differences the catalogue publishes.