Bondone Silcrete – Epoxy Primer & Sealer Coat for Concrete Floors
Silcrete is the product most contractors skip and then regret. I have had three calls this year from people whose Flowtop peeled within months. Every time, the same cause – no primer. Silcrete is what goes down first. It penetrates the concrete, locks out moisture, and gives the topcoat something to hold onto. Mixed at 100:50 by weight with a 55-75 minute pot life, it covers approximately 45 sq.ft per kg at 100 micron thickness as a primer layer. As of July 2026, the 7.5 kg kit is ₹3,610 from our Ghaziabad warehouse. 12 kg, 30 kg, and 200 kg drums also available. For detailed guidance on epoxy waterproofing for basements, terraces, and concrete structures, see our dedicated guide.
Bondone Silcrete – Key Facts at a Glance
How much does Bondone Silcrete cost?
₹3,610 per 7.5 kg kit (₹481 per kg). Covers approx 340 sq.ft as a primer coat. PAN India shipping from Ghaziabad.
Do I need a primer before epoxy floor coating?
Primer is essential. Concrete is porous and breathes moisture. Silcrete penetrates pores, seals the substrate, and creates a bond surface the topcoat can grip. Skipping it causes delamination.
What Is Bondone Silcrete?
Bondone Silcrete is a two-part, solvent-free epoxy system from DCM Shriram's Bondone range. It serves two distinct roles on industrial and commercial sites. First, as a penetrating primer that seals concrete substrates before any epoxy topcoat goes down. Second, as a standalone waterproofing and chemical-resistant coating for surfaces where protection trumps appearance. If you are a flooring contractor, a waterproofing specialist, or manage a pharma facility, ETP plant, chemical storage area, or a building with damp basements – Silcrete belongs in your specification.
Technical Specifications (from DCM Shriram TDS)
Mix Ratio
100:50Resin to hardener by weight
Pot Life
55-75 minAt 25°C – 100g mass per ASTM D2471
Mix Viscosity
2,000-2,500mPa·s at 25°C – good filler loading
Surface Dry
120-130 minAt 35°C – 200µm film per ASTM D5895
Touch Dry
225-235 minAt 35°C – 200µm film per ASTM D5895
Coverage
45 sqft/kgAt 100°m on ideal concrete surface
Complete Specifications from TDS
| Property | Value | Test Method |
|---|---|---|
| Mix ratio (resin:hardener) | 100 : 50 by weight | - |
| Resin viscosity at 25°C | 600 - 1,100 mPa·s | ASTM D2196 |
| Hardener viscosity at 25°C | 7,000 - 11,000 mPa·s | ASTM D2196 |
| Mix viscosity at 25°C | 2,000 - 2,500 mPa·s | ASTM D2196 |
| Pot life (100g, 25°C) | 55 - 75 minutes | ASTM D2471 |
| Surface dry (200°m, 35°C) | 120 - 130 minutes | ASTM D5895 |
| Touch dry (200°m, 35°C) | 225 - 235 minutes | ASTM D5895 |
| Hard dry (200°m, 35°C) | 345 - 355 minutes | ASTM D5895 |
| Coverage (primer, 100°m) | 45 sq.ft per kg | - |
| Lap shear strength (24h) | Min 70 kg/cm² | ASTM D1002 |
| Compressive strength (mortar) | 75 - 85 MPa | ASTM D695 |
| Flexural strength (mortar) | 40 - 45 MPa | ASTM D790 |
All values from official Bondone Silcrete TDS by Hindusthan Speciality Chemicals Limited. TDS and MSDS available on request.
Which Silcrete Application Should You Choose?
| If you want to... | Use this approach | Why | Price (incl GST) |
|---|---|---|---|
| Prime concrete before a floor topcoat | Silcrete 7.5kg Kit | Penetrates and seals concrete; creates a bond surface for topcoats like Flowtop; prevents delamination | ₹3,610 |
| Waterproof a basement, terrace, or water tank | Silcrete 7.5kg Kit | Cures to a seamless non-porous barrier; resists water ingress and chemical attack; works on basement floors and walls | ₹3,610 |
| Line a cement tank or chemical bund | Silcrete 7.5kg Kit | Good mechanical strength and chemical resistance protect the substrate from aggressive contents | ₹3,610 |
| Grout heavy machinery or repair foundations | Silcrete + Quartz Sand | Mix at 100:50:500 ratio to create a high-strength epoxy mortar for machine grouting and foundation repairs | ₹3,610 + sand |
Not sure? WhatsApp us your project details – we'll recommend the right product and quantity.
Chemical Resistance
Silcrete withstands 30% sulphuric acid (H2SO4), 20% hydrochloric acid, 15% acetic acid, up to 40% sodium hydroxide (NaOH), and common industrial solvents including toluene, xylene, MEK, and acetone at ambient temperatures. It also resists mineral oils, diesel, and greases. I keep a glass jar of 30% sulphuric acid at the warehouse with a six-month-old Silcrete sample submerged. No softening, no discolouration, no weight loss. Not suitable for concentrated oxidizing acids above 40%.
Silcrete vs Flowtop – What's the Difference?
| Feature | Bondone Silcrete | Bondone Flowtop |
|---|---|---|
| Primary Role | Primer + protective waterproofing coat | Decorative self-levelling floor topcoat |
| Appearance | Functional grey, semi-gloss | High-gloss, smooth decorative finish |
| Thickness | 0.3-0.5mm primer / 1-2mm coating | 1.5-3mm self-levelling |
| Chemical Resistance | High – acids, alkalis, solvents, oils | Moderate – general industrial use |
| Best For | Pharma, ETP, basements, bunds, primer layer | Warehouses, showrooms, garages, corridors |
| Used Together? | Yes – Silcrete first, Flowtop on top. Most professional jobs need both. | |
For decorative self-levelling floors, see Bondone Flowtop. For the epoxy flooring guide, see epoxy flooring India.
How to Use Bondone Silcrete
1. Surface preparation: The surface must be thoroughly degreased with acetone, toluene, or trichloroethylene. Ensure it is free from dirt, oil, grease, and moisture. Inadequately pre-treated substrates will not yield satisfactory results.
2. Mixing: Weigh resin and hardener at 100:50 by weight – use a digital scale. Mix thoroughly for 2-3 minutes, scraping sides. Pot life is 55-75 minutes at 25°C. For mortar applications, add quartz sand (Mix No.10) at 100:50:500 ratio for general mortar or 100:50:800 for foundation grouting.
3. Application as primer: Apply by roller or squeegee directly onto prepared concrete. The low mix viscosity (2,000-2,500 mPa·s) allows good substrate penetration. Coverage is approximately 45 sq.ft per kg at 100 micron thickness.
4. Curing: Surface dry in 120-130 minutes at 35°C, touch dry in 225-235 minutes. Full cure and chemical resistance develops over 7 days at 25°C. For faster productivity, cure at 40-60°C.
Price & Availability
₹481 per kg – competitive for a high-performance epoxy primer
Price valid until March 31, 2027. Includes resin + hardener in correct 100:50 ratio. PAN India shipping from our Ghaziabad warehouse.
UPI, bank transfer, or credit card invoice via Razorpay link. No COD. GST invoice provided. For enquiries, WhatsApp Jobin directly.
Delivery & Returns
We ship PAN India from our Ghaziabad warehouse. Typical delivery: 2-5 business days via Delhivery, Blue Dart, or surface transport for bulk. Orders before 12 PM go out same day.
All sales are final. No returns accepted. Damaged-in-transit claims are handled on a case-by-case basis with photographic evidence. Check our refund policy for details.
Need the full epoxy range? Browse our epoxy resin India guide.
Frequently Asked Questions
What is Bondone Silcrete used for?
Bondone Silcrete has two primary uses. First, as an epoxy primer applied beneath floor topcoats like Flowtop – it penetrates concrete, seals the substrate, and prevents delamination. Second, as a standalone waterproofing and chemical-resistant coating for basements, terraces, water tanks, ETP plants, and chemical bunds.
Is Silcrete a primer or a topcoat?
Silcrete is primarily a primer – it goes underneath the topcoat. However, it can also serve as a standalone protective coating in areas where chemical resistance and waterproofing matter more than appearance. It is not a decorative topcoat.
Do I need Silcrete before applying Flowtop?
Yes. Flowtop and any epoxy floor topcoat require a primer for proper adhesion. Skipping the primer is the most common cause of floor delamination. Silcrete penetrates and seals the concrete, creating a bond surface that the topcoat can grip.
What is the mix ratio and pot life of Bondone Silcrete?
The mix ratio is 100:50 by weight (Resin : Hardener). Pot life is 55-75 minutes at 25°C for a 100g mass per ASTM D2471. Always verify against the batch-specific TDS supplied with your order.
What chemicals does Silcrete resist?
Silcrete withstands 30% sulphuric acid (H2SO4), 20% hydrochloric acid, 15% acetic acid, up to 40% sodium hydroxide (NaOH), and common industrial solvents including toluene, xylene, MEK, and acetone at ambient temperatures. Not suitable for concentrated oxidizing acids above 40%.
Can Silcrete be used for basement waterproofing?
Yes. Silcrete cures to a seamless, non-porous barrier that prevents water ingress from damp concrete substrates. It is commonly used for basement floors and walls in Delhi NCR where groundwater seepage is a persistent problem during monsoon.
What is the price of Bondone Silcrete 7.5kg?
The 7.5kg kit of Bondone Silcrete is priced at ₹3,610 (₹481 per kg). Contact us on WhatsApp at +91 8595955752 for stock availability.
How is Silcrete different from Flowtop?
Silcrete is a functional epoxy primer and protective coating designed for substrate penetration, waterproofing, and chemical resistance. Flowtop is a decorative self-levelling epoxy topcoat for high-gloss floor finishes. Silcrete goes underneath; Flowtop goes on top. Most professional flooring jobs use both.
Need Silcrete for Your Project?
WhatsApp Jobin directly. He'll confirm stock, share the TDS, and arrange dispatch from Ghaziabad within 24 hours.
WhatsApp +91-8595955752