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ROOFPLAST SA 80 is a chloride-free, alkali-free liquid set accelerator for sprayed and emergency concrete. Complies with IS 9103-99 (< 0.1% chloride BS 5075, < 1% alkali). Delivers exceptionally high early strengths with initial set under 2 minutes and final set under 6 minutes at spray dosage. Freeze point -16°C, pH 2.5 — safe for prestressed and reinforced concrete when properly dosed. For tunnel and mine linings, rock support shotcrete, pre-cast concrete, cold-weather concreting, underwater foundations and emergency repairs.
Figures are controlled laboratory results. Actual site performance varies with substrate, temperature, humidity, application method and workmanship — please confirm the current product datasheet before specification.
ROOFPLAST SA 80 is an alkali free shotcrete accelerator in liquid form, and it is chloride-free as well. It is dosed into the mix at the spray nozzle, where it makes sprayed concrete set within minutes and build very high early strength. As a set accelerator for sprayed concrete it lets thick layers go on in passes.
Dosed at the nozzle so lining layers set within minutes.
Fast set and high early strength for rock support shotcrete.
Used at 4–6% by weight of cement for underwater concreting.
Develops early strength in cold conditions, with a freeze point of -16°C.
Quick setting concrete when a repair cannot wait.
Speeds up setting and early strength in pre-cast work.
On shotcrete accelerator dosage, use 1–3% by weight of cement at the nozzle, or 2–4% for 10 cm layers. At spray dose the initial set is under 2 minutes and the final set under 6 minutes. It complies with IS 9103-99, with chloride below 0.1% and alkali below 1%. As an underwater concrete accelerator the dose rises to 4–6%. It is toxic and acidic at pH 2.5, so wear rubber gloves and safety glasses. Design the mix with a W/C ratio below 0.45.
Armstrong Chemicals supplies ROOFPLAST SA 80 to sites across Telangana, Andhra Pradesh, Karnataka, Kerala and Tamil Nadu, including Hyderabad, Vijayawada, Bengaluru, Kochi and Chennai.
Chloride is below 0.1% and alkali below 1%, which makes it safe for reinforced and prestressed concrete when properly dosed.
Initial set in under 2 minutes at spray dose lets each shotcrete layer hold before the next pass goes on.
A freeze point of -16°C and faster hydration help concrete develop early strength in cold ambient conditions.
A chloride-free, alkali-free set accelerator for shotcrete, tunnel linings, underwater foundations and emergency concrete — with a freeze point at -16°C.
Get a QuoteROOFPLAST SA 80 is toxic. Do not ingest. Wear rubber gloves and safety glasses at all times. If ingested, give an emetic of common salt in water and seek immediate medical attention. Wash skin/eye contact immediately with plenty of water.
1–3% by weight of cement. For 10cm layers, 2–4% is typically suitable. Design W/C ratio below 0.45.
4–6% by weight of cement for underwater foundations and emergency below-water placements.
Initial set in under 2 minutes and final set under 6 minutes at spray dosages — enabling thick shotcrete layers and emergency concrete without waiting on conventional set times.
< 1% alkali and < 0.1% chloride — meeting the most stringent tunnel lining specifications while remaining safe for reinforced and prestressed concrete.
IS 9103-99 compliance plus built-in plasticising action that improves workability and early strength simultaneously — not just acceleration.
Freeze point of -16°C enables cold-weather concreting, underground environments and sub-zero applications where conventional accelerators may freeze.
Nozzle-dosed set accelerator for tunnel linings, shotcrete, underwater foundations and emergency concrete repairs.
Initial set under 2 minutes and final set under 6 minutes at spray dosages — the fastest concrete setting product in the Armstrong range.
Alkali content below 1% meets tunnel lining and mining specifications that prohibit alkali-containing shotcrete accelerators.
Meets IS 9103-99 for concrete admixtures; chloride content < 0.1% (BS 5075) — safe for prestressed and reinforced concrete.
Enables cold-weather concreting and sub-zero underground applications; density 1.425 g/cm³ for consistent nozzle dosing.
Wear rubber gloves and safety glasses — ROOFPLAST SA 80 is TOXIC and acidic (pH 2.5)
Design concrete/shotcrete mix with W/C ratio below 0.45
For shotcrete: dose at 1–3% by weight of cement at the spray nozzle (2–4% for 10cm layers)
For underwater concreting: dose at 4–6% by weight of cement
Apply in controlled layers; first layer must achieve initial set before next pass
Water-cure with mist spray after application
In case of skin/eye contact wash immediately with plenty of water. If ingested, give emetic of common salt in water and seek immediate medical attention
Full specifications, application systems, layering guides, and coverage tables.
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