Sikagard 680 S
Two-Component Solvent-Free Epoxy Protective Coating for Concrete Floors and Walls
Authorized Project Distributor — Sika India | Space Arc Engineering, Ghaziabad
Product Overview
Sikagard 680 S is a two-component, solvent-free epoxy coating from the Sika Sikagard protective coating range, formulated to protect concrete surfaces in demanding industrial and infrastructure environments from chemical attack, water ingress, abrasion, and contamination. When applied to mechanically prepared concrete floors, walls, or structural elements, Sikagard 680 S forms a dense, smooth, pinhole-free epoxy film that acts as a continuous barrier preventing the penetration of water, aggressive liquids, gases, and chloride ions into the concrete substrate. This protective function significantly extends the service life of concrete structures in environments where the concrete is exposed to chemical attack — sewage, fertilisers, food acids, cleaning agents, petroleum products, or other industrial chemicals that would degrade unprotected concrete over time. Sikagard 680 S is formulated without solvents, making it safe for application in enclosed spaces such as underground tanks, sumps, and reservoirs without the ventilation requirements and fire hazards of solvent-containing coatings. It also means minimal odour during application, an important consideration for food processing plants, pharmaceutical facilities, and water treatment works where product contamination through solvent vapour must be avoided. The cured Sikagard 680 S coating is smooth, easy to clean, and resistant to a wide range of chemicals, making it highly suitable for the hygiene-critical surfaces of food and beverage processing facilities, pharmaceutical manufacturing environments, and potable water contact surfaces. Sikagard 680 S is approved for use on surfaces in contact with potable water in many countries (check Sika India approval status) and has been widely used on water treatment plant concrete. Space Arc Engineering supplies Sikagard 680 S for industrial floor and wall protection, water and wastewater treatment infrastructure, and pharmaceutical and food processing facility projects throughout Delhi NCR and Uttar Pradesh.
Applications
- Water treatment plant concrete walls, floors, and channel linings — potable water contact surface protection
- Sewage treatment plant concrete — biological and chemical attack resistance
- Food and beverage processing plant floors and walls — hygienic, easy-clean, acid-resistant surface
- Pharmaceutical manufacturing facility floors — chemical resistance, seamless, validated cleanable
- Industrial bund and containment area lining — chemical spill containment coating
- Concrete tank and sump lining — water and chemical immersion resistance
Key Advantages
- Solvent-free — safe in enclosed tanks, sumps, and reservoirs without heavy ventilation
- Smooth, pinhole-free film — impermeable to water, chemicals, and chloride ions
- Suitable for potable water contact surfaces — water treatment plant lining applications
- Broad chemical resistance — sewage, food acids, cleaning agents, petroleum products
- Easy-clean surface — smooth epoxy film with no joints or pores for contamination
- Two-component system — consistent factory-batched formulation, reliable performance
Technical Data
| Type | Two-component solvent-free epoxy protective coating |
| Components | Part A (epoxy resin) and Part B (hardener) — mix ratio as per Sika TDS |
| Pot Life | Approximately 30 to 60 minutes at 25 degrees C after mixing |
| Application | Brush, roller, or airless spray |
| DFT per Coat | Approximately 100 to 250 microns per coat |
| Full Cure | 7 days at 23 degrees C for full chemical resistance |
Get a Quote
+91 9999155255 | info@space-arc.com | Space Arc Engineering, Sahibabad, Ghaziabad
Frequently Asked Questions
How many coats of Sikagard 680 S are needed for a water treatment plant concrete reservoir wall and what is the minimum coating specification?
For a water treatment plant concrete reservoir wall that will be in continuous contact with potable water, the minimum recommended Sikagard 680 S specification is a three-coat system as follows: Coat 1 — Sikagard 680 S as primer and first protective coat: apply by brush or short-nap roller at a coverage of approximately 0.25 to 0.35 kg per m2 to the mechanically prepared, clean, and surface-dry concrete. This first coat penetrates into the prepared concrete surface profile, seals the surface pores, and establishes the adhesive bond for subsequent coats. Allow to cure 16 to 24 hours at 25 degrees C before overcoating. Coat 2 — Sikagard 680 S intermediate coat: apply at the same coverage rate as the first coat, building the total DFT and sealing any pinholes that may have formed in the first coat over surface voids in the concrete. At this point, any remaining pinholes or surface irregularities should be noted and filled with an epoxy filler before the third coat. Allow 16 to 24 hours cure. Coat 3 — Sikagard 680 S finish coat: apply uniformly to achieve the final smooth, pinhole-free surface. After three coats the total DFT should be approximately 300 to 600 microns — sufficient for continuous water immersion service. For reservoir walls subject to aggressive water (low pH, high chloride, or aggressive CO2 content), or for any chemical containment application, increase to four coats or switch to a thicker epoxy mortar lining system. Full cure for water immersion service is 7 days at 23 degrees C — do not flood the reservoir before this period as premature water contact will soften and blush the incompletely cured epoxy film. Inspect the completed coating with a wet sponge holiday detector before flooding to confirm the coating is free of pinholes and discontinuities.
Source Sikagard 680 S for Your Project
Space Arc Engineering is an Authorized Project Distributor for Sika India serving Delhi NCR, Ghaziabad, Noida and Uttar Pradesh.