Bostik Waterproofing Malaysia 2026 — Complete Product Guide & Prices
Compare Boscoseal AC2, PUW, RC2 prices, application methods, and see how Bostik compares to Sika and Pentens.
Bostik is one of the world's oldest adhesive and waterproofing brands — founded in 1889 and now owned by Arkema Group, a French multinational with €8.7 billion in revenue and operations in 50+ countries. In Malaysia, Bostik's waterproofing range is marketed under the “Seal & Block” umbrella and spans DIY-friendly acrylic coatings to high-performance polyurethane membranes. This guide covers every Bostik waterproofing product available in Malaysia, including verified 2026 pricing and a head-to-head comparison against Sika and Pentens.
Complete Bostik Waterproofing Product Range
Boscoseal AC2 / Bostik Supercoat Fiber
Most Popular~RM380 / 20kg · ~RM112 / 5kgType: One-part water-based acrylic polymer fibre reinforced membrane · Best for: Exposed roofs, bathrooms, balconies, wet areas
- Built-in fibre reinforcement — no separate matting needed
- Low odour (suitable for indoor use)
- Excellent UV resistance
- Brush or roller applied
- Foot-trafficable after curing
- Colors: Grey, White
Boscoseal RC2 / Bostik Supercoat EX
Type: Single-component acrylic flexible waterproofing coating · Best for: Exposed roof membranes, pipes, conduits, parapet walls
- Water-based, environmentally friendly
- Bridges cracks effectively
- Prevents metal corrosion
- UV resistant
- Flexible across wide temperature range
Boscoseal PUW
Premium~RM400–500 / 20kg (Shopee/Lazada)Type: One-component water-based modified polyurethane membrane · Best for: Premium waterproofing, high-elasticity requirements
- No mixing required — ready to use
- Highly elastomeric after curing
- Brush, roller, or trowel applied
- Strong adhesion to masonry
- Non re-emulsifying (won't break down with water)
Boscolastic
Contact distributorType: Two-component elastomeric acrylic polymer cementitious coating · Best for: Concrete structures, suspended structures, basements
- Mixed on site (Part A + Part B)
- Excellent crack bridging
- Accommodates structural movement
- Non-toxic
- Withstands heavy topping
Boscoflex
Contact distributorType: Two-component polymer modified cementitious waterproof coating · Best for: Tanking, lining, below-grade applications
- Easy 2-part mixing
- Superior adhesion to concrete and cement render
- Abrasion resistant
- Can apply to damp substrates
- Paintable with elastic paint
Boscoseal 16
~RM200–300 / rollType: Self-adhesive rubberized bitumen sheet membrane · Best for: Large flat roof areas, concrete slabs, new builds
- Self-adhesive — no torch or heat needed
- Self-sealing overlap edges
- No seaming tape required
- Polyethylene film protected
- Stable under severe weather
Boscoseal PUR
Contact distributorType: Bitumen modified liquid-applied elastomeric membrane · Best for: Below-grade and foundation waterproofing
- For foundations, basements, and buried structures
- Bitumen modified for flexibility
- Liquid-applied, brush or roller
Boscoseal AR
Contact distributorType: Anti-root water-borne liquid applied membrane · Best for: Green roofs, planter boxes, landscaping areas
- Constrains root growth without harming plants
- Water-borne — environmentally friendly
- For green roofs and planters
Bostik Waterproofing Prices in Malaysia 2026
Verified January 2026. Prices may vary by retailer.
| Product | Size | Price (RM) | Type |
|---|---|---|---|
| Boscoseal AC2 | 20kg | ~RM380 | Acrylic fibre membrane |
| Boscoseal AC2 | 5kg | ~RM112 | Acrylic fibre membrane |
| Boscoseal PUW | 20kg | ~RM400–500 | PU membrane |
| Boscoseal 16 | per roll | ~RM200–300 | Sheet membrane |
Pro tip: Boscoseal AC2's built-in fibre reinforcement eliminates the need to purchase separate fibreglass matting (which adds RM30–80 to Sika/Pentens jobs), making the total installed cost competitive.
Bostik vs Sika vs Pentens — Which Should You Choose?
| Feature | Bostik | Sika | Pentens |
|---|---|---|---|
| Parent company | Arkema (France) | Sika AG (Switzerland) | Pentens (Malaysia) |
| Market position | #3 in Malaysia | #1 in Malaysia | #2 in Malaysia |
| Price range | Mid–premium | Budget to premium | Budget–mid |
| Product range | Wide (8+ products) | Widest (10+ products) | Moderate (5–6) |
| Roof specialist | Boscoseal AC2 | SikaFill MY | Pentens T200 |
| Key advantage | Fibre-reinforced — no matting | Cheapest entry (RM65) | Local brand, budget-king |
| Best for | DIY — single-product solution | Commercial, certified systems | Price-sensitive residential |
How to Apply Bostik Boscoseal AC2 (Step-by-Step)
Boscoseal AC2 is the most popular Bostik product for DIY roof and bathroom waterproofing.
- 1
Surface preparation
Clean the surface thoroughly. Remove loose material, paint, oil, and dust. Repair cracks wider than 2mm before waterproofing.
- 2
Check surface moisture
The surface should be clean and free of standing water. Damp surfaces are acceptable for most applications.
- 3
Priming
Not always required on concrete — check the Technical Data Sheet (TDS). On porous surfaces, a diluted coat of AC2 (1:1 with water) can act as primer.
- 4
First coat
Apply by brush or roller at approximately 1.0–1.5 kg/m². Work the product into all corners, joints, and cracks. For corners and movement joints, bed in Bostik sealing tape or fabric strip.
- 5
Drying time
Allow 4–6 hours between coats depending on weather and temperature. Do not apply in rain or if rain is expected within 4 hours.
- 6
Second coat
Apply perpendicular to the first coat direction to ensure even coverage and eliminate pinholes.
- 7
Full cure
7 days for full waterproofing performance. Protect from rain for the first 24 hours.
- 8
Tiling over
For bathroom and wet area applications, you can tile over once fully cured.
Where to Buy Bostik Waterproofing in Malaysia
Online
- Shopee Malaysia — search "Bostik Boscoseal" for full range including smaller packs
- Lazada Malaysia — search "Bostik waterproofing" for competitive pricing
- eWarehouse.my — stocks the full Boscoseal range
Physical Stores
- Hardware stores nationwide (use Bostik dealer locator at bostik.com/malaysia)
- Chin Chun Hardware (Shah Alam, Selangor) — stocks professional range
- VelocityDIY (Johor Bahru)
- Mr. DIY (selected Bostik products, mainly smaller packs)
Always buy from authorised dealers to ensure genuine products. Bostik products have batch codes on packaging — verify at bostik.com/malaysia.
Frequently Asked Questions
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