Huiying materials Huiying Int'l Business Co.Huiying materials
Material schedule

Waterproofing materials

Seven series, from substrate sealing and the main membrane through to topcoat protection and full PU systems.

Topcoat / protection 0.2 Main membrane 1.0–1.6 Waterproof primer 0.1 RC substrate
Standard three-layer build-upDetail A-01
Schedule

Seven series

The first three form the principal build-up; the remaining four are selected by location and existing condition.

Waterproofing PrimersCompound Membrane SystemsTopcoatsFlexible CementPlugging and Crystalline SystemsClear Protective CoatingsSolvent-Based PU Systems
01

Waterproofing Primers

Substrate sealing and adhesion Single-component water-based primers used to seal and consolidate the substrate and to strengthen adhesion of the waterproofing layer above.

Single-component water-based primers used to seal and consolidate the substrate and to strengthen adhesion of the waterproofing layer above. Film-forming, fast-drying penetrating, multi-purpose reinforcing and inorganic types are available for new or aged concrete, friable surfaces and chalked substrates.

Characteristics
  • Water-based, no solvent odour, no fire hazard in handling
  • Fast drying with good penetration; no residual tack once cured
  • Strong adhesion to concrete; improves impact resistance
  • Dense, water-resistant film that prevents surface chalking
Applications

Priming for roof, wall, bathroom and kitchen sandwich waterproofing; bonding coat for external walls, courtyards and basement retaining walls

Reference
Coverageapprox. 0.05–0.1 kg/m² per coat
Packaging16–18 kg
02

Compound Membrane Systems

Main waterproofing layer Single-component membranes based on water-based polymer resins with aggregate or anti-crack fibre, curing to a continuous elastic film.

Single-component membranes based on water-based polymer resins with aggregate or anti-crack fibre, curing to a continuous elastic film. Acrylic fibre-reinforced, high-elasticity, high-elongation, chloroprene-polyurethane, bituminous emulsion and water-based polyurethane types are available.

Characteristics
  • Elongation from 400% to 1500% depending on type
  • Single-component and water-based; ready to use from the pail
  • Tested for tensile and peel strength
  • Weather resistant, odourless and non-toxic; avoids the hydrolysis issues of cement-based heavy-build systems
Applications

Roofs, external walls, floor junctions, window perimeters, terraces and balconies; bathroom and kitchen sandwich waterproofing; basement retaining walls

Reference
Coverageapprox. 0.4–2.0 kg/m² depending on type and number of coats
Packaging18–20 kg
03

Topcoats

Protection and thermal reflection Applied over the waterproofing layer to provide finish, UV protection and thermal insulation.

Applied over the waterproofing layer to provide finish, UV protection and thermal insulation. Reflective thermal topcoats (65%+ reflectance), elastomeric topcoats and water-based polyurethane finishes are available in a range of colours.

Characteristics
  • Reflective type achieves 65%+ solar reflectance, lowering internal temperature and cooling load
  • Elastic, flexible film that moves with the substrate without cracking
  • Weather and mould resistant; colour stable over time
  • Available in white, grey, beige, green and off-white
Applications

External wall finishes; metal roofs, corrugated sheeting, steel panels and container units; roof membrane finish coats

Reference
Coverageapprox. 0.2–0.8 kg/m²
Packaging18 kg
04

Flexible Cement

Two-part resin and aggregate systems Two-component systems combining a water-based resin with selected inorganic aggregate, curing to a tough film that is both elastic and high in strength.

Two-component systems combining a water-based resin with selected inorganic aggregate, curing to a tough film that is both elastic and high in strength. Standard, copolymer emulsion, heavy-build (up to 3 mm in one pass) and vinyl resin types are available, along with pressure-sensitive adhesive and injection grades.

Characteristics
  • Excellent adhesion to concrete; elastic and crack-resistant film
  • Heavy-build type achieves 3 mm in a single application without delamination
  • Water-based with no solvent odour
  • Compatible with elastomeric or thermal topcoats as a finish layer
Applications

External walls, roofs, bathrooms and courtyards; internal-layer waterproofing to basement retaining walls

Reference
Coverageapprox. 1.0–1.2 kg/m² horizontal, 0.6–0.8 kg/m² vertical, per coat
Packagingresin 18 kg + aggregate
05

Plugging and Crystalline Systems

Remedial treatment for active leaks Hydraulic cement-based compounds.

Hydraulic cement-based compounds. Rapid-set plugging mortar cures in 3–5 minutes and immediately stops water ingress through cracks and honeycombing. Crystalline penetrating grades react with the concrete to form crystals that seal pores and micro-cracks, and can be applied to damp surfaces.

Characteristics
  • Plugging mortar stops water instantly and will cure under water
  • No shrinkage after curing; high structural strength
  • Contains no metallic constituents; will not rust or expand
  • Crystalline grades remain vapour permeable and protect reinforcement from corrosion
Applications

Leaking cracks in concrete or masonry; surface defect and exposed-reinforcement repair; anchor fixing; sealing around pipe penetrations

Reference
Reference usage1 kg plugging mortar fills approx. 600 cm³; crystalline grade approx. 1.0 kg/m² per mm thickness
Packaging16–20 kg
06

Clear Protective Coatings

Stain and weather resistance Transparent protective layers applied over topcoats or decorative finishes to improve stain and weather resistance.

Transparent protective layers applied over topcoats or decorative finishes to improve stain and weather resistance. Gloss, matt (5–10 GU) and two-component water-based matt or gloss grades are available, along with a solvent-based non-yellowing finish.

Characteristics
  • Hydrophobic, dust-shedding film with self-cleaning behaviour
  • Resistant to acid, alkali and weathering; protects the decorative layer from colour change
  • Available in gloss and matt finishes
  • Non-yellowing grade leaves the original appearance of the building unchanged
Applications

Protection of coated surfaces, exposed aggregate, power-floated cement, board materials and tiling; internal and external walls and trim

Reference
Coverageapprox. 0.05–0.1 kg/m²
Packaging15–18 kg
07

Solvent-Based PU Systems

Two-part polyurethane Two-component polyurethane waterproofing systems offering toughness, elasticity and reliable resistance to water ingress.

Two-component polyurethane waterproofing systems offering toughness, elasticity and reliable resistance to water ingress. The range covers membrane, elastomeric topcoat, thermal layer and non-sag joint sealant, and can be used with a single-component PU primer.

Characteristics
  • High tensile strength and elongation; resistant to acid, alkali and weathering
  • Thermal grade reflects approximately 65% of solar radiation
  • Non-sag sealant suits both vertical and horizontal joints
  • Primer bonds strongly to cementitious substrates and to PU
Applications

Roof waterproofing and thermal protection for high-rise buildings, factories, car parks and apartment blocks; roof gardens, basements, bathrooms and swimming pools; movement joints

Reference
Coveragemembrane approx. 2.6–3.9 kg/m², topcoat approx. 0.2–0.4 kg/m²
Packagingbase 10–20 kg + hardener 5–10 kg
FAQ

Frequently asked questions

How do I choose a roof waterproofing material?
Confirm four things first: substrate type and condition, drainage, whether the roof takes foot traffic, and the number of workable days available. For a standard flat concrete roof the build-up is primer, compound membrane and topcoat. Roofs that pond water or take traffic are better served by a solvent-based PU system.
What is the difference between flexible cement and PU?
Flexible cement is a two-part resin and aggregate system with the best compatibility with concrete, suited to internal wet areas and free of odour. Solvent-based PU is a two-part polyurethane with the highest film strength, elongation and water resistance, suited to ponding or trafficked areas, but it costs more and requires accurate mixing.
The roof leaked again within two years. Is that a material fault?
Usually not. The most common causes, in order, are: applying over a substrate that is still too wet; failing to remove chalking and failed coatings; coating over cracks without reinforcement; poor detailing at parapets and outlets; and insufficient coverage or inadequate recoat intervals.
How do I calculate how much material is needed?
Area × coverage rate × number of coats. For example, 100 m² at 0.6 kg/m² over two coats requires around 120 kg. Rough substrates increase consumption, so allow an additional 10–15% when estimating.
Can material be applied to a damp surface?
Most water-based products require moisture content below 10%. Crystalline penetrating and plugging materials are the exception — they rely on moisture to react with the concrete and form sealing crystals.
Do you provide technical advice or sample panels?
Yes. Send us the location, substrate condition, area and programme and we will return a complete material specification with quantity estimates. Sample panels can be produced for external decorative work.

Have a project to quote?

Send us the location, substrate condition, area and programme, and we will return a full material specification with quantities.

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