SikaSeal-128 280ml | Multipurpose neutral silicone sealant.
Product Category: Silicone Sealant
Brand: Sika
Model Code: SikaSeal®-128
Description
SikaSeal®-128 is a 1-component neutral silicone sealant, non-corrosive and suitable for indoor and outdoor applications. It is designed for multipurpose joint sealing and weatherproofing across a wide range of construction materials.
Applications
Weatherproof joint sealing
Window and door installation
Tile perimeter joints
General construction sealing
Suitable substrates:
Glass
Metals
Aluminium
Painted surfaces
Wood
Ceramic tiles
Key Features
Excellent UV and weather resistance
Primerless adhesion to many substrates
High elasticity and flexibility
Neutral curing (low odor)
Non-corrosive formulation
Product Information
Type: Neutral silicone sealant
Composition: Neutral silicone
Packaging
~330 g cartridge (clear)
~460 g cartridge (basic colors)
~600 g cartridge (clear)
~900 g cartridge (basic colors)
Colours
White
Clear
Grey
Black
Others on request
Shelf Life
12 months
Storage
Store upside down
Dry conditions
Temperature below +27°C
Protect from sunlight
Density
Basic colors: 1.45 – 1.55 kg/L
Clear: 0.95 – 1.05 kg/L
Technical Data
Mechanical Properties
Shore A Hardness:
30–50 (basic colors)
20–30 (clear)
Tensile Strength:
~1.0 MPa (basic colors)
~0.5 MPa (clear)
Elastic Recovery: >80%
Elongation at Break:
≥250% (basic colors)
≥200% (clear)
Movement & Temperature
Movement Capability:
±25% (basic colors)
±20% (clear)
Service Temperature:
-40°C to +150°C
Consumption Guide (300 ml)
Width
Depth
Length
6 mm
4 mm
~12.5 m
9 mm
5 mm
~6.5 m
12 mm
6 mm
~4 m
20 mm
10 mm
~1.5 m
Application Conditions
Air temperature: +5°C to +40°C
Substrate temperature: +5°C to +40°C
≥3°C above dew point
Performance
Curing Rate: ~3 mm / 24 hrs
Skin Time:
~15 minutes (basic colors)
~5 minutes (clear)
Joint Design
Recommended width: 10–20 mm
Recommended depth: 10 mm
Surface Preparation
Surface must be:
Clean
Dry
Sound
Free from oil, grease, dust
Primer / Treatment
Normally no primer required
For high-performance applications:
Non-porous → Aktivator-205
Metals → Aktivator-205 + Primer-3 N
PVC → Primer-215
Glass → clean with isopropanol
Porous → Primer-3 N
Application Method
Apply masking tape (optional)
Insert backing rod
Prime if required
Apply sealant with gun
Ensure full contact with joint sides
Avoid air entrapment
Tool immediately
Remove tape within skin time
Cleaning
Tools → Sika® Remover-208
Skin → Cleaning wipes
Limitations / Restrictions
Do NOT use:
On concrete, plaster, masonry (alkaline surfaces)
On natural stone, marble, granite
On bituminous or rubber materials
In swimming pools
Under water pressure or immersion
In confined spaces without airflow
For structural glazing
For food / medical use
Notes
Cannot be painted
Colour variation possible (aesthetic only)
Performance Advantages
Strong adhesion without primer
Flexible and durable sealing
Resistant to UV, weather, and temperature
Wide material compatibility
Safety & Handling
Follow SDS guidelines
Store in original sealed packaging
Additional Notes
Lab-tested data
Site conditions may vary
Local regulations may differ
Summary
SikaSeal®-128 is a high-performance neutral silicone sealant ideal for multi-purpose sealing, offering excellent flexibility, UV resistance, and strong adhesion, making it suitable for both indoor and outdoor construction applications.