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BestSeal AC400

BestSeal AC400

Elastic, modified co-polymer water-proofing membrane

Advantages:

  • One component, easy to apply.

  • High adhesion and seals small cracks.

  • Good weather resistance, especially against UV radiation.

  • Easy to apply with common tools such as rollers, brushes, spray guns, etc.

  • Does not pollute water sources (including domestic water) on direct contact with the product.

  • Odorless and non-toxic for applicators.

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BestSeal AC400

Technical summary

Category

Waterproofing & Fillings

Elastic, modified co-polymer water-proofing membrane

BestSeal AC400 is a one-component waterproofing compound based on modified Acrylic co-polymer with high elasticity.

Product data

Form

Paste, natural gray color.

Composition

Modified Acrylic Co-polymer with additives and minerals.

Density

1.40 ± 0.02 kg/liter (25°C).

Coverage

0.4 ÷ 0.8 kg/m²/coat (depending on surface condition and the required waterproofing).

Packaging

25 kg/pail.

Storage

In a cool, dry place at an ambient temperature of 5°C - 35°C.

Shelf life

12 months from the date of manufacture.

Application ambient temperature

Minimum +15°C / Maximum +35°C.

Technical specifications

Cured for 07 days.

PropertyResultTest method
Tensile strength (MPa)≥ 1.0ASTM D412-16
Elongation (%)≥ 200ASTM D412-16
Adhesion strength (MPa)≥ 0.75ASTM D7234-12
WaterproofingNo leakage (1.5 bar pressure for 07 days)BS EN 14891:2017
Artificial agingPass, 2000 hours, UVA-340: no cracking, no blistering, no delamination, no surface chalking.TCVN 11994-3:2017, ISO 4892-3:2016

Applications

BestSeal AC400 is used to waterproof items such as:

  • Roof slabs, balconies, etc.

  • External walls, vertical walls, wall bases on the roof, etc.

  • Sealing nail holes in tole roofing, concrete cracks, joints, tile-cladding joints, etc.

Advantages

  • One component, easy to apply.

  • High adhesion and seals small cracks.

  • Good weather resistance, especially against UV radiation.

  • Easy to apply with common tools such as rollers, brushes, spray guns, etc.

  • Does not pollute water sources (including domestic water) on direct contact with the product.

  • Odorless and non-toxic for applicators.

Application instruction

Surface preparation:

  • The surface to be waterproofed must be clean, hard and solid, and cleaned of oil, grease, dust, moss/mold, excess cement and other impurities, etc.

  • Surface defects (cracks, voids, etc.) must be repaired and patched with suitable dedicated Bestmix repair products (contact the technical support team for advice).

  • Saturate the entire surface with clean water, but do not leave standing puddles on the surface.

Mixing:

  • The product is pre-mixed; just stir well before use.

Application:

  • BestSeal AC400 can be applied with a brush, short-nap roller or a suitable spray machine.

  • To ensure waterproofing, BestSeal AC400 must be applied in at least 2 coats perpendicular to each other so the material fully covers the surface to be waterproofed. The wait time between the 2 coats is 4 - 24h depending on weather, temperature and ventilation conditions.

Notes:

  • For highly absorbent surfaces, when applying the first coat, dilute BestSeal AC400 with about 5 - 10% clean water (by weight) to increase the material's penetration deeper into the surface.

  • For roof-slab surfaces, a slope must be created before applying the waterproofing.

  • Do not apply in rainy conditions. If it rains during application, stop immediately and promptly cover the freshly applied area to protect it from direct rainwater.

  • For surface areas regularly subject to mechanical impact during service, apply a cement-sand mortar topping (24 - 48 hours after the final coat) to protect the BestSeal AC400 layer from mechanical impacts that damage the material's surface structure.

  • If no protective mortar layer is applied, the material must be cured for at least 7 days before use; BestSeal AC400 self-cures with air and does not need water to dampen the surface after application.

Cleaning:

  • Clean tools and equipment with clean water immediately after finishing the work and before the material cures.

Safety guidance:

  • BestSeal AC400 may cause irritation to sensitive skin on prolonged contact. Wear a mask, gloves and safety goggles when using the product.

  • If splashed into the eyes, nose or mouth, rinse immediately with plenty of clean water several times before going to the nearest medical facility for timely and proper treatment.

  • Dispose of excess product at locations designated by local regulations.

BestSeal AC400 is a one-component waterproofing compound based on modified Acrylic co-polymer with high elasticity.