Product Review

SikaTop Seal 109 Review Malaysia 2026 — Is It Worth It?

An honest review of SikaTop Seal-109 MY — Malaysia's leading flexible cementitious waterproofing coating. We cover pricing, the 109 vs 107 comparison, application steps, where to buy, and when it's the right product versus alternatives.

SikaTop Seal-109 MY is one of the most specified waterproofing products in Malaysia — and for good reason. It is a two-part, polymer-modified flexible cementitious coating manufactured by Sika at their Sg. Buloh facility in Selangor, sold in a 36kg set (Part A liquid 10kg + Part B powder 26kg). Applied before tiling in bathrooms, shower areas, wet kitchens, and balconies, it creates a flexible waterproof barrier that bonds to concrete and bridges small cracks up to 1mm.

The most common question people ask is how it differs from SikaTop Seal-107. The answer is flexibility. Sika 109 is flexible, with elongation at break over 100%. Sika 107 is rigid, with no crack-bridging ability. For most Malaysian bathrooms and any tile substrate where micro-movement is expected — which is practically every installation — 109 is the product you want. This guide covers everything you need to know before buying.

SikaTop Seal-109 MY — What You Are Buying

SikaTop Seal-109 MY

Flexible CementitiousRM250–350 per 36kg set

Type: Two-Part Polymer-Modified Flexible Cementitious Waterproofing Coating · Best for: Bathroom floors and walls, shower areas, wet kitchens, swimming pools, balconies under tile, water tanks

Flexible — bridges cracks up to 1mm (the key advantage over rigid Sika 107)
Elongation at break >100% (tested to ASTM D412) — handles micro-movement in tile substrates
Manufactured locally at Sika's Sg. Buloh facility, Selangor
36kg set: Part A (10kg liquid) + Part B (26kg powder) — mixed on site
Non-toxic — safe for potable water contact (swimming pools, water tanks)
Apply minimum 2 coats at ~1.0 kg/m² per coat on floors
Must be protected by screed, tiles, or granite — not for UV-exposed surfaces
Shelf life: 6 months from production date — check before buying

Sika 109 Price in Malaysia — 2026 Data

Prices verified from hardware stores and online marketplaces, January 2026.

Product	Price (RM)	Size	Type
SikaTop Seal 109	RM250–350	36kg set	Flexible cementitious
SikaTop Seal 107	RM150–200	25kg set	Rigid cementitious
Sikalastic 1K MY	RM250	20kg	Fiber-reinforced flexible
Pentens T-200	RM180–220	20kg	Acrylic waterproofing
Boscoseal AC2 (Bostik)	RM380	20kg	Acrylic fibre reinforced
Sika Brushcoat WP	RM65	25kg	Basic cementitious

Cost per sqm for Sika 109 at 2 coats: approximately RM14–19/sqm material only. A standard Malaysian bathroom (40 sqm) costs roughly RM560–760 in material — plan for 2 sets of 36kg for a bathroom with walls.

What Is SikaTop Seal 109 Best For?

SikaTop Seal 109 is a substrate-layer waterproofing product — it goes on before tiling, not as a final exposed finish. It is the right product for wet areas inside a building where the waterproofing will be protected by tiles, screed, or granite.

Best applications (where Sika 109 excels):

Bathroom floors and walls — the #1 use case in Malaysia; applied before all tile installations
Shower areas — splash zone walls and floor waterproofing
Wet kitchens — floor and wall protection against water ingress
Swimming pools — interior pool lining; non-toxic, safe for direct water contact
Water tanks and reservoirs — suitable for potable water (cement-based chemistry)
Basements and below-grade structures
Balconies and terraces — under the tile waterproofing layer
RC gutters, planters, and car parks
Concrete protection against carbonation and environmental attack

Where it is not the right product:

Exposed roof surfaces — Sika 109 is not UV-stable for permanent exposure; use acrylic coatings (SikaFill MY, Pentens T-200) instead
Metal substrates — designed for concrete, masonry, and cement-based surfaces only
Cracks larger than 1mm — the 1mm crack-bridging limit applies; for larger cracks or significant movement, use Sikalastic 1K MY
DIY beginners without waterproofing experience — the two-part mixing and surface preparation requirements mean single-component products are easier for first-time users

Sika 109 vs Sika 107 — What Is the Actual Difference?

Feature	SikaTop Seal 109 (Flexible)	SikaTop Seal 107 (Rigid)
Flexibility	✅ Flexible — bridges cracks up to 1mm	❌ Rigid — no crack-bridging ability
Elongation at break	>100% (ASTM D412)	Minimal
Best for	Bathrooms, pools, balconies, areas with any structural movement	Rigid water tanks, basement walls with zero movement, pore filling
Packaging	36kg set (Part A 10kg + Part B 26kg)	25kg set (Part A 20kg + Part B 5kg)
Price (2026)	RM250–350	RM150–200
Potable water safe	Yes	Yes
Consumption per coat	~1.0 kg/m²	~1.5 kg/m²
Movement tolerance	Handles micro-movement in tile substrates	No movement tolerance — cracks if substrate moves
Verdict	✅ Right choice for almost all Malaysian bathrooms	Use only for genuinely rigid structures with no movement expected

Sika 109 vs Sikalastic 1K MY — Which Is Better Value?

Feature	SikaTop Seal 109	Sikalastic 1K MY
Components	Two-part — mix Part A + Part B on site	One-part — ready to use from the pail
Flexibility	Good — bridges cracks up to 1mm	Superior — fiber-reinforced, higher elongation than 109
Ease of use	Moderate — paddle mixer needed for lump-free mix	Easier — no mixing, brush or roller directly
Price	RM250–350 / 36kg set	RM250 / 20kg pail
Cost per sqm (2 coats)	RM14–19	RM25–30
Best for	Standard bathroom waterproofing — best value per sqm	High-movement areas, large commercial pools, professional contractors who want simpler site logistics
Verdict	✅ Better value for standard bathroom waterproofing	✅ Premium choice where maximum flexibility or easy application is priority

How to Apply SikaTop Seal 109 — Step by Step

Surface preparation accounts for 80% of waterproofing success. Do not rush this.

1
Prepare the surface
Remove all loose particles, oil, grease, curing compounds, and any existing failing coatings. Repair cracks, honeycombing, and uneven surfaces with cement mortar or Sika repair products. Then saturate absorbent surfaces with clean water — the substrate should be damp but with no standing water or puddles. For porous surfaces such as gypsum board, apply Sika Primer-11 WMY and allow to dry first.
2
Mix Part A and Part B
Pour approximately 90% of Component A (the liquid) into a clean mixing vessel. Slowly add all of Component B (the powder) while mixing continuously. Use a paddle mixer at 400–500 rpm (slow speed) until you have a smooth, creamy, lump-free consistency. Add the remaining 10% of Component A if the mix is too thick. Critical rule: never add water — use only the provided liquid component to adjust consistency.
3
Apply the first coat
While the substrate is still damp, apply the first coat by brush, roller, or squeegee. Work the material firmly into the surface for full bond. Consumption: 1.0 kg/m² per coat for bathroom and balcony floors; 1.0–1.5 kg/m² per coat for splash-zone walls. For high-water-ingress areas, a third coat may be applied. Never exceed 2 kg/m² in a single layer.
4
Apply stripe coat at junctions
At wall/floor junctions, corners, and over any existing cracks, apply an additional stripe coat — a thicker, concentrated pass of material. This reinforces the most vulnerable points where structural movement is most likely to cause stress. Apply the stripe coat while the first coat is still fresh.
5
Wait 4–8 hours, then apply second coat
Allow the first coat to cure for 4–8 hours at 20°C; in Malaysia's heat it will typically be faster. Do not allow the first coat to fully dry out before applying the second — lightly re-dampen if needed. Apply the second coat at the same consumption rate, working perpendicular to the first coat direction.
6
Protect and cure
Protect the fresh coating from rain, direct sun, strong wind, and dust for a minimum of 8 hours after the final coat. Allow full cure before applying screed, tiles, or other finishes. Always protect SikaTop Seal 109 with screed, tile, or granite overlay — it is not designed for permanent UV exposure.

Pro tip: One 36kg set covers approximately 18 sqm at 2 coats (1.0 kg/m² per coat). A typical Malaysian bathroom floor of 6–8 sqm plus shower walls of 10–12 sqm will require approximately 1.5–2 sets. Always buy 2 sets to ensure you have enough, as running out mid-application is a common mistake.

Sika 109 — Do's and Don'ts

Pros

Always apply minimum 2 coats on floors and wet areas
Dampen the substrate before application — damp but no standing water
Apply a stripe coat at all wall/floor junctions and corners
Use Sika Primer-11 WMY on porous or gypsum surfaces
Store in a cool, dry place away from direct sunlight
Check the shelf life (6 months from production date) before purchasing
Mix with a slow-speed paddle mixer (400–500 rpm) for a lump-free consistency
Apply screed or tiles over the coating — always protect from UV

Cons

Never add water to the mix — use Component A liquid only to adjust consistency
Never exceed 2 kg/m² in a single layer
Do not apply under direct strong sun or strong wind — coating dries too fast and may crack
Do not apply on surfaces with active water leaks — stop leaks first
Do not use as a decorative finish — it dries grey and may bloom
Do not leave the coating permanently exposed without a protective covering
Do not use on metal surfaces — designed for concrete and masonry substrates only
Do not buy stock with less than 3 months of shelf life remaining

Where to Buy SikaTop Seal 109 in Malaysia

Online

Shopee Malaysia — search "SikaTop Seal 109" (36kg set widely available)
eWarehouse.my — full product listing with technical specs and pricing
Lazada Malaysia — multiple sellers, compare prices before buying

Physical Stores

Chin Chun Hardware — Shah Alam, Selangor (SKU: 88014056)
Cheng Huat Hardware — Sentul, Kuala Lumpur
Man Kian Hardware — Puchong, Selangor
VelocityDIY — Skudai, Johor Bahru
Buildmate Hardware — multiple Klang Valley locations
Singtex Hardware — multiple locations
Pintas Trading — Simpang Ampat, Penang

To find the nearest authorized Sika dealer in your state, use the dealer locator at mys.sika.com → Store Locator. Purchasing from authorized dealers ensures you receive genuine product within shelf life.

Frequently Asked Questions

Yes — SikaTop Seal 109 is one of the most widely specified waterproofing products for bathrooms in Malaysia. It is specifically designed for wet areas: bathroom floors, shower areas, wet kitchens, and balconies. Apply a minimum of 2 coats on floors and 1 coat on splash-zone walls before any tiling work begins.

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Last updated: January 2026 | Malaysia Roof Repair