Fosroc, specified properly — and applied the way the specification assumed.

Break a fresh face and spray phenolphthalein. Sound concrete goes bright pink; the carbonated zone stays colourless, and the depth of that colourless band against your measured cover tells you whether the front has reached the steel. Carbonation advances as a broad front. Chloride does not need the pH to fall — it attacks locally and pits, so you confirm it by sampling in depth increments and reporting chloride as a percentage by weight of cement at rebar depth, with half-cell potential mapping where the affected area is larger than what you can see. It changes the system because a carbonation repair is reinstatement plus an anti-carbonation barrier over the whole element, whereas a chloride repair also has to deal with the incipient anode that a clean new patch creates at its own boundary. Getting this wrong is why some buildings get re-patched every three years.

If the driver is carbonation and chloride at rebar depth is low, a correctly built patch plus an anti-carbonation coating over the whole element is usually the right answer. If chloride is confirmed, the new repair is high-pH and chloride-free, so it re-passivates the steel inside the patch and makes the still-contaminated steel just outside corrode faster — the ring crack around a two-year-old patch is that mechanism. Galvashield XP, Galvashield XPi and Galvashield CC exist for exactly this. But anode spacing and quantity are a designed output of chloride level and steel density, not a shelf choice, so we will not quote anodes off a photograph. Send the chloride results by depth and the half-cell map and we will tell you honestly whether it needs a design.

Placement method and reinforcement congestion, not quality. The Renderoc HB grades are high-build, hand- or spray-applied, for vertical and overhead work where the material has to stay where you put it — Renderoc HB25, HB30, HB45, HB60. The LA grades are free-flowing, self-compacting micro-concretes poured into formwork, for large areas and sections too congested to trowel behind — Renderoc LA, LA55, LA60, LA80, LA90. Grade selection within either family is a compatibility decision against the parent concrete, and the band is on that grade’s own India-issue datasheet.

No — and this is one of the more expensive misunderstandings in Indian concrete repair. A repair material stiffer and stronger than its parent concrete attracts load into itself and cracks around its own perimeter; differential thermal movement finishes the job. What you want is compatibility: strength and elastic modulus banded to the substrate. The paper version is EN 1504-3, which classes repair mortars R1 to R4 — an R3 material needs compressive strength above 25 MPa, adhesion of at least 1.5 N/mm² and a modulus above 15 GPa; R4 needs 45 MPa, 2 N/mm² and 20 GPa. A site-batched rich sand-cement patch has no declared class and has demonstrated none of those. Ask us for the declared class of the grade you are specifying and put it in the BOQ line.

They are different problems. For a structure not yet cast, the strong answer is a pre-applied bonded membrane — Proofex Engage is a cell mesh bonded to a sheet that lets the poured concrete interlock mechanically into it, so a puncture leaks at the puncture rather than thirty metres away. Add the waterstops deliberately — a PVC centre-bulb profile such as Supercast PVC where the joint moves, a hydrophilic such as Supercast SW20 where it does not — and remember permeability is decided at the batching plant with Conplast WP or Conplast Crystalline. For a basement already built and leaking, you are into arrest and inject — Renderoc Plug 1, Nitofill UR63, Nitofill PU 1R — then a negative-face treatment such as Brushbond Crystal, and where the entry point genuinely cannot be traced, managed drainage with Proofex Cavitydrain rather than another year of chasing it.

Yes. The MTC is issued against the batch supplied, on request — tell us at order stage so it moves with the consignment rather than being chased afterwards. Batch and manufacturing date are recorded on the dispatch and on the invoice, so material on your site is traceable to a consignment. We supply the India-issue datasheet for the exact grade, not the global one, plus the SDS. That matters more than it sounds: for Conplast SP430 the India sheet states compliance with IS 9103:1999 and BS 5075 Part 3, while the UK-issued sheet for the identical product cites BS 5075 Part 3 and ASTM C494 with a CE block under EN 934-2 and no IS reference at all. A specification written off the wrong sheet quotes standards an Indian PMC cannot use.

Shelf life is grade-specific and printed on the India-issue datasheet, together with the storage conditions it assumes — which is the part that usually gets broken, because a sack stored in a hot open shed has not had the shelf life the sheet describes. Batch and manufacturing date are marked on the pack and recorded on our invoice, so any bag on site ties back to a consignment and to an MTC. We state the shelf life and storage requirement for the grades on your order in writing, with the quotation. If material has sat on your site through a summer, tell us before you use it rather than after.

There is no public Fosroc price list, and any site showing one is showing you something it made up. What we quote is a build-up rather than a headline item — the layers, in order, with the grade named for each, so the primer, the bond coat, the anodes, the moisture-control layer and the protection board are all costed rather than discovered on site. Alongside it we state the documentation position and the HSN code and GST treatment, both confirmed on the quotation itself. We deliberately do not publish an HSN code on this page: a wrong code on a website is a real problem for a buyer, and ours belongs on the invoice.

Yes. We are based in Ghaziabad and supply Delhi, Noida, Greater Noida, Gurugram, Faridabad and Ghaziabad directly, and dispatch pan-India. Realistic lead time depends on which layer of the build-up you need: fast-moving items move on a working-day timeframe out of Ghaziabad, and specialist grades are quoted with a stated lead time against a released order rather than promised optimistically. All 1,094 Fosroc lines across 72 ranges are listed on this site — the fast movers are stocked, the rest are sourced against your order.

Yes — Space Arc Engineering is an authorised Fosroc distributor and applicator, based in Ghaziabad. We are not Fosroc and we do not speak for Fosroc. What it changes is documentation and channel: you get the manufacturer test certificate against the batch, the India-issue datasheet for the exact grade rather than a global PDF someone downloaded, and material traceable to a consignment. It also means we hold the layers that get value-engineered out — the zinc primer, the anode, the bond coat, the waterstop — rather than only the headline product.