Supex Neutral Plus Silicone Sealant

Supex Neutral RTV Silicone Sealant is a professional-grade, non-corrosive, low-odour sealant designed for durable bonding and waterproof sealing on a wide range of materials. Its neutral-cure formulation offers excellent adhesion to glass, metals, plastics, ceramics, uPVC, and painted surfaces while remaining permanently flexible and resistant to weather, UV, and moisture. Ideal for construction, automotive, industrial, and household applications where long-lasting performance and material safety are essential.

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Product description

Supex Neutral Plus Silicone Sealant – Premium Neutral Cure Sealant

Supex Neutral Plus is a high-quality, one-part silicone sealant. It features low-modulus and low-odour design. This neutral cure silicone delivers excellent bonding and sealing. Its chemistry is non-corrosive. Therefore, it stays safe on metals, electronics, and sensitive surfaces. Acid-cure silicones could damage these.

The sealant provides strong adhesion and long durability. It bonds well to various substrates. For example, glass, glazed tiles, concrete, galvanized steel, anodized aluminium, uPVC, wood, ceramics, painted surfaces, and many plastics. In addition, it remains waterproof, weatherproof, and permanently flexible. So, it fits interior and exterior applications in construction, automotive, industrial, marine, and maintenance tasks.

Supex Neutral Plus resists UV, moisture, chemicals, temperature changes, and aging. It keeps performing in tough conditions. Moreover, it cures reliably even in wet areas. This makes it great for kitchens, bathrooms, cold rooms, and washdown zones.

Supex Neutral Plus Features & Advantages

Non-corrosive neutral-cure formula.
Low odour and VOC compliant.
Low-modulus for better movement handling.
Superior adhesion to metals, plastics, ceramics, wood, glass, uPVC, and composites.
Stays permanently flexible—no cracking, shrinking, or hardening.
Fully waterproof and weatherproof.
Excellent UV and temperature resistance.
Safe for sealing electrical equipment.
Ideal for appliance parts and mixed-material joints.

Why Supex Neutral Plus Wins Overall

Exceptional Flexibility & Durability: 750% elongation crushes typical neutral cures, making it ideal for high-movement joints, thermal expansion, vibration-prone areas (e.g., industrial, automotive, uPVC windows).
Specialized Features: RAL colour matching and food-grade options make it versatile for clean rooms, pharma, food processing, or custom aesthetics—areas where others may require alternatives.
India-Centric Advantages: Faster curing, local manufacturing (reduced costs/lead times), and tailored for Indian climates/construction needs (e.g., mirror bonding without corrosion, low-odour for interiors).
Performance Edge in Demanding Apps: Superior for non-porous/sensitive substrates, mold/chemical resistance, and hygienic environments.

Supex Neutral Plus delivers premium performance with better value, customization, and local relevance—making it the smarter choice for most Indian applications. For exact project needs, test adhesion or consult Supex support (pan-India delivery available).

Top Applications of Neutral Plus Silicone Sealant

Professionals rely on neutral cure silicone for many tasks. It seals and bonds in:

Construction joints, expansion gaps, windows, doors, and façades.
Automotive assembly, bodywork, and mechanical parts.
Industrial machinery, enclosures, electrical cabinets, and HVAC systems.
Marine and aerospace areas facing weather and vibration.
Cold rooms, clean rooms, and food-processing zones.
Bathrooms, kitchens, sanitary fittings, and high-moisture spaces.

Its strong resistance to UV, heat, cold, and stress works well indoors or outdoors.

Best Neutral Cure Sealant for Clean Rooms in India?

Supex Neutral Plus stands out as a top choice for clean rooms due to its non-corrosive, low-odour, low-VOC neutral cure formula that minimizes airborne contamination.
Provides exceptional flexibility with 750% elongation, ensuring durable, crack-resistant seals under vibration and temperature changes.
Offers strong adhesion to metals, glass, uPVC, and various substrates common in pharma and semiconductor facilities.
Highly resistant to chemicals, disinfectants, mold, and frequent cleaning processes.
Supex can supply RAL colours for aesthetic or coding needs and food-grade silicone variants for FDA-compliant hygienic zones.
Trusted pan-India delivery

Supex Neutral Plus meets these needs with reliable quality.

Packaging, Colors & Availability in India

Available in 270 ml, 300 ml cartridges, 600 ml sausage, 20 kg pail
Colours: Clear, White, Black, RAL 9002, RAL 9010, RAL 9003, RAL 7040 , any colour as per request

Applications

Mirror Bonding

Ideal for adhesive mirror-to-wall bonding across surfaces such as tiles, wood, metal, and painted walls.
Designed to be non-corrosive, ensuring the mirror backing is not damaged over time.
Provides a strong, flexible, long-lasting hold.

Clean Room Sealing

Suitable for sealing clean room walls, floors, ceilings, doors, and window perimeters.
Formulated to meet strict clean-room requirements with low VOCs and minimal odour.
Excellent for airtight joints and preventing moisture or particle intrusion.

Cold Room & Refrigeration Panels

Specially designed for sealing PUF panels, cold room joints, and refrigeration unit seams.
Neutral-cure, mildew-resistant white silicone ideal for cold environments and temperature-controlled spaces.

Automotive & Industrial Sealing

Industrial-grade RTV silicone for sealing in automotive manufacturing, machinery, and heavy equipment.
Widely used as a formed-in-place gasket for gearboxes, pumps, electrical enclosures, solar modules, and mechanical housings.
Effective for oil sump sealing, timing belt covers, bus body sealing, and more.

Multi-Substrate Bonding

Provides excellent adhesion to a wide range of materials including metals, ceramics, glass, composites, and many plastics.
Suitable for sealing joints exposed to water, oil, chemicals, and outdoor conditions.

Usage instructions

Supex Neutral RTV Silicone Sealant is supplied ready to use and flows smoothly from the cartridge under pressure. Its paste-like consistency makes application simple, and the surface can be tooled easily using a spatula or wooden paddle.

Apply the sealant directly to the prepared surface.
Tool the surface within 5–10 minutes of application. After this window, the sealant will begin forming a skin, making tooling difficult or impossible.
At approximately 22°C (72°F) and 50% relative humidity, the sealant develops a tack-free skin in about 30 minutes.
If using masking tape to define clean edges, remove it before the skin forms to avoid tearing or pulling.
The sealant cures from the outside inward, so allow adequate curing time before exposing the joint to stress, movement, or moisture.

Technical details

Property	Specification
Appearance	Paste
Odour	Low odour
Specific Gravity	0.99
Skinning Time	5 min
Application Temperature	+5°C to +45°C
Consistency	Non-sag
Hardness Shore A (24 h)	17
Hardness Shore A (7 d)	21
Tensile Modulus	1 MPa
Elongation at Break	750%
Depth of Curing (24 h)	2 mm
Depth of Curing (7 d)	8 mm
Extrudability	5 ml / 2 s

Testing Conditions:
23 ± 2°C and 50 ± 5% RH unless otherwise specified.
Values are for guidance only and not intended for specification writing.

Storage & shelf life

Packaging : Sealant Silicone RTV is available in 260 ml, 280 ml cartridge, 600 ml sausage and 200 Kg drum

Colours: Black, grey, white, clear readily avaialble. various colours against order

Shelf Life: Store the product in a cool and dry place. The shelf life is 12 months at temperatures between +5°C and +25°C.

Caution: Keep Sealant Silicone out of reach of children. Avoid contact with skin. Use only in well ventilated areas. Irritating to eyes. Don’t use in aquariums.

Health and Safety: For information and advice on the safe handling, storage and disposal of chemical products, users shall refer to the most recent Material Safety Data Sheet containing, physical, ecological, and toxicological and other safety related data.