Sika SC-MS2NB Architectural Sealant 2-Component Modified Silicone Type

Product Made In Japan
Manufacturer: Sika
Model: SC-MS2NB

This modified silicone sealant hardens chemically, reacting between its base material and hardening agent, and features a low-modulus, low tensile stress design. It cures into a form with outstanding weather resistance, durability, and dynamic followability, striking an ideal balance in sealant performance. Additionally, its excellent stain resistance and strong adhesion to paint ensure prolonged aesthetic preservation of buildings.

Sealing Material Properties

Appearance	Base			Paste Form
	Hardener			Paste Form
	Color Master			Base Form
Mixing Ratio	Base: Hardener: Color Master			100:10:3.7
Performance based on JIS A 4575-8	Slump (1X1111)	Vertical	50	0
			50.7	0
	Slump (0101)	Horizontal	50.5	0
			50°C	0
	Elastic Recovery (%)			90
	Substrate			Aluminum
	Tensile Stress (MPa)		23°C	0.3
			-20°C	0.4
	Adhesion under Constant Elongation		23°C	NF
			-20°C	NF
	Adhesion after Compression Heating and Tensile Cooling			NF
	Adhesion after Artificial Light Exposure			―
	Adhesion after Immersion in Water			NF
	Volume Loss (%)			3.5
	Durability Class			9030
Reference Properties	Shelf Life (months)			6
	Extrusion Time (seconds)		5°C	4
			23°C	3
	Pot Life (hours)		Condition	Low Temperature	Moderate Temperature	High Temperature
			5°C	6	―	―
			23°C	2	5	10
			35°C	―	―	3
	Tack-Free Drying Time (hours) (23°C)			4 or Less	10 or Less	24 or Less
	Density (g/cm³)			1.1
3: Tensile Adhesion Properties	Substrate	Stress/Strain Conditions		50% Tensile Stress	Maximum Tensile Stress	Elongation at Maximum Load (%)
	Aluminum	After Curing	23°C	0.18	0.51	700
		post-heating	23℃	0.20	0.52	600
		post-immersion in water	23℃	0.17	0.45	700
	glass	post-curing	23℃	―	―	―
		post-heating	23℃	―	―	―
		post-immersion in water	23℃	―	―	―
		post-accelerated exposure	23℃	―	―	―

The combined ratio refers to the ratio of masses. A “1” in test results signifies non-compliance, while “NF” denotes no damage. The Type 1 tensile adhesion test follows JIS A1439 standards. “After heating” denotes the pressure heating temperature in the durability test, set at 80℃ for products not classified for durability. These results are indicative values.

Color

Color Name (Corresponding Color)
White	✓	Dark Brown	✓
Light Grey	✓	Beige	✓
Grey	✓	Dark Amber	✗
Concrete Grey	✓	Black	✓
Dark Grey	✓	Stainless Steel Color	✓
Color Master Packaging		155 bags/box

Packing

Base Set	4 per case
Compatibility	✓

Primer Used

Primer		No.18	No.40
Type		1-component urethane-based	1-component urethane-based
Formaldehyde Emission Level		Low	Slightly Low
Appearance		Slightly pale yellow and transparent	Pale yellow and transparent
Main Components		Synthetic resin, silane coupling agent	Synthetic rubber, synthetic resin, silane coupling agent
Drying Time (minutes)	50	60+ (or more)	60+ (or more)
	20°C	30+ (or more)	30+ (or more)
	35°C	15+ (or more)	15+ (or more)
Effective Time After Application (hours)		8	8
Effective Storage Period (Sealed When Not in Use)		Same day	Same day
Shelf Life (months)		6	6
Contains Solvents		Ethyl acetate, butyl acetate	Ethyl acetate, butyl acetate
Main Substrates		Aluminum, concrete	Aluminum, concrete

To fully harness the performance of Hamatite, meticulous application is necessary.

Before construction, hold a pre-construction meeting to discuss joint details like shape, dimensions, and secondary water drainage treatment. Select materials, primer, and ancillary materials, and create a manual for the construction procedure. Mix the base and hardener of two-component sealant materials, including the Color Master system, until no streaks remain, using a mixer with a hoop diameter of 229 mm and a mountain-shaped paddle designed for 4L cans. The mixing time should last about 15 minutes, alternating mixer rotation and scraping off material from can walls and blade parts with a spatula.

Before construction, inspect the site, joint shape, dimensions, and any unevenness, repairing any defects in the adherend, such as junk, chips, or cracks. Ensure the adherend is dry and clean the surface first with a dry cloth, then with a solvent-soaked cloth, choosing a solvent like methylcyclohexane or normal hexane if necessary.

Install suitable back-up material for the joint dimensions, using a bond breaker at the bottom for insufficient joint depth. Carefully apply masking tape, avoiding the adherend surface and using tape resistant to primer solvent. Load the mixed sealant into the caulking gun within its usable time, avoiding air bubbles. Select a nozzle fitting the joint width for sealant application, considering angle and speed, and promptly finish with a spatula for smooth pressing and finishing. Remove masking tape immediately after application and clean around the joint.

Finally, apply primer evenly with a brush, avoiding splatter and overflow, and ensure a specified drying time before filling the sealant material within the effective time after primer application. For effective performance, strictly follow the materials usage and construction procedure.

Handling Precautions

When transferring material in and out of containers, ensure not to spill.
Wear protective gloves and aprons during handling.
Ensure adequate ventilation when working in confined spaces.
Wear protective glasses and masks as needed depending on the work situation.
Wash your hands and gargle thoroughly after handling.
Avoid direct skin contact.
Avoid contact with eyes.
Do not inhale vapors.
Do not ingest.
Strictly refrain from smoking while using Hamatite.
Do not touch until it has hardened and ensure it is properly cured.
Entrust waste disposal to an industrial waste disposal contractor.

Emergency Measures

If it gets on the skin, immediately wipe it off with a rag, and then wash thoroughly with plenty of water and soap.
If itching or inflammation occurs, seek medical attention promptly.
If it gets in the eyes, rinse thoroughly with clean water and seek immediate medical attention from an ophthalmologist.
If inhaling vapors makes you feel unwell, move to a place with fresh air immediately.
If you experience headaches or other abnormalities, seek medical attention promptly.
If ingested, induce vomiting with plenty of water or milk and seek immediate medical attention.

Handling Location

Do not use near open flames.
Install local exhaust systems at the handling site.
Keep out of reach of children.

Storage

Store in a cool, dry place away from direct sunlight, flames, humidity, and water.
Use within the effective period.
Use quickly after opening.

Prohibition of Use for Purposes Other Than Intended

This product is developed for construction purposes. Do not use it for any other purpose. *Note: Some Hamatite products listed in this catalog may be harmful or flammable. For detailed information, refer to the Safety Data Sheet (SDS).