Polyshield Protection & Insulation Coating System 

Proper application of Polyshield is crucial to ensure its performance and longevity. Below are guidelines for surface preparation, priming, mixing, and application, as well as key technical specifications of the product:

 
Surface Preparation: All surfaces must be clean, dry, and sound before Polyshield application. Remove any dust, loose particles, chalk, peeling paint, oils/grease, mildew or any contaminants. For old concrete, power-wash or scrub with detergent and rinse to eliminate dirt and soluble salts that could interfere with adhesion. New concrete or masonry should be allowed to cure for at least 28–30 days prior to coating , and any laitance or form-release agents should be thoroughly removed. It’s also important to repair any noticeable cracks or voids in the substrate – hairline cracks can be filled with a suitable crack filler or our primer before coating . Proper prep ensures the coating can bond tightly and perform optimally.

Mixing and Application: Polyshield comes in two parts (Part A resin and Part B hardener) that need to be mixed in the correct ratio. It is supplied in pre-measured kit sizes (for example, a 1.6 kg kit contains 1 kg of Part A and 0.6 kg of Part B, packaged separately). Larger kits (8 kg and 40 kg total) are also available for bigger projects.

The steps for application are as follows:

Prime the surface (if required)

For porous substrates like concrete, first apply Prime Coat primer to seal the surface. This primer is a single-component, milky white coating that promotes adhesion. It typically covers about 4–5 m² per kg (roughly 43–54 sq.ft per kg) on concrete, though coverage will drop to ~3.7–4.6 m² (40–50 sq.ft) on very rough or uneven surfaces. Allow the primer to dry (usually 4–6 hours drying time) before applying Polyshield. On metal surfaces, use an appropriate metal primer (anticorrosive) – coverage is similar, around 60–70 sq.ft per kg – and let it fully dry. Priming greatly improves the topcoat yield and adhesion, especially on absorbent surfaces.

Mix Polyshield components
Stir each part individually, then mix Part A and Part B in a 1:0.6 ratio by weight (for example, 1 kg of Part A with 0.6 kg of Part B) . Pour Part B into Part A and mix thoroughly for about 3–5 minutes until a homogeneous mixture is obtained.
Note : The mixing ratio is preset if you use complete kit units (just combine the entire contents of both containers). Do not add any solvent or thinner – Polyshield is ready-to-use once mixed (no dilution needed or recommended) .

Apply the first coat
Use a brush or roller to apply the mixed Polyshield onto the prepared (and primed) surface. Spread it evenly to achieve the desired thickness. On horizontal areas, pour out and spread; on vertical areas, use multiple thin passes to avoid sagging.
Coverage : When applied over a primed, non-porous surface, Polyshield yields roughly 5–6 m² per kg (≈54–65 sq.ft/kg) in one coat. This means a standard 1.6 kg kit can cover up to ~8 m² (around 80 sq.ft) for one coat under optimal conditions. If applied without primer on a porous surface, expect a significantly lower coverage (~40–50 sq.ft per kg) for the first coat, as some of the material will be absorbed into the substrate’s pores. It’s evident that priming can nearly double the effective coverage of the Polyshield topcoat.

Optional reinforcement
If the surface has expansion joints, significant cracks, or if you are coating soft insulation, it is recommended to embed a reinforcement fabric (fiberglass mesh or tape) into the first coat while it is still wet. Lay the fiberglass mesh over areas prone to movement (e.g., over joints or spanning cracks) and use the wet Polyshield beneath as the bedding. Smooth it out so the mesh is fully saturated. This will strengthen the coating and improve crack- bridging. (For insulating pipes or ducts, as noted earlier, a full wrapping with fiberglass tape prior to coating is used – that tape gets locked in place by the Polyshield coats.)

Apply the second coat
After the first coat has become touch-dry (typically in 2–3 hours at 25°C, depending on ambient conditions) , apply a second coat of Polyshield. No additional mixing is needed if you prepared enough material in step 2 (just ensure it’s still within usable pot life). Otherwise, mix a fresh batch following the same 1:0.6 ratio. Apply the second coat evenly, completely covering the first coat (and fully embedding any reinforcement mesh applied). This builds up the coating to a durable thickness. The recommended application is two coats in total for most waterproofing and insulation purposes. Each coat is usually around 250–300 microns thick, yielding a combined dry film around 0.5 mm (500 microns), though thickness can be increased in heavy-duty scenarios by additional coats.

Curing and finishing
Allow the final coat to cure. Polyshield will be surface-dry in a few hours and achieves an initial cure in about 24 hours (at 25°C). It is generally fully cured (maximally hardened and chemically resistant) in 7 days. Protect the coated surface from traffic, standing water or heavy abrasion until it has cured at least 24 hours. Cleanup of tools can be done with water and mild detergent before the resin sets, or with solvent (acetone) for partially cured material. Because the reaction is exothermic, any mixed coating should be used within about 30 minutes (pot life) to avoid it thickening in the container. Always ensure good ventilation when applying in enclosed areas and wear appropriate safety gear (gloves, goggles, etc.) as required.