Sealants

Sealants and sealant kits are widely used by both hobbyists and professionals for a broad range of protecting and waterproofing jobs. The best sealant type to use in a given scenario will depend on the surface materials and the location of the seal. There are many varieties of sealants, putties, and sealant remover kits on sale, with leading brands including Dow Corning and Bostik. While most tend to fall within one of a few basic categories - cement sealants, chemical sealants, or silicone sealants - there are also a number of sealants designed for more specialised purposes.

What’s the difference between sealant types?

Silicone sealants - among the most widely available sealant types, and ideal for a wide array of household, DIY and construction tasks.

Acrylic sealants - often a cheaper alternative to silicone for use on wood, aluminium, and UPVC, and can also be painted. They’re less flexible than most silicone versions, and more prone to eroding under certain application conditions.

Polyurethane foam sealants - extremely flexible/elastic and highly waterproof, ideal for sealing most metals and fibreglass.

Why is sealant modulus and cure type important?

High modulus sealants are less elastic but more hardwearing, and better suited to indoor applications as a kitchen or bathroom sealant (around baths, showers, sinks and worktops).

Low modulus sealants offer better flexibility and adhesion where slight movement of the joint may be a factor, but are less hardwearing overall. They’re generally best for outdoor and weather-resistant applications (perimeter seals and exterior UPVC).

Most sealants are available in one of two cure types - acetoxy and neutral.

  • High modulus sealants tend to be acetoxy cure, meaning they’ll cure faster and harder, and will emit a slight vinegar smell while doing so.
  • Low modulus sealants are often sold in natural cure variants, meaning they adhere better to a greater range of surfaces, cure slowly to a more elastic consistency, and give off little odour.

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Description Price Colour Sealant Type Application Package Size Package Type Minimum Operating Temperature Food Processing Safe Maximum Operating Temperature Chemical Type Physical Properties Trade Name Cure Time Product Form Chemical Composition
RS庫存編號 705-9030
製造零件編號3307271
HK$88.25
單位
White Silicone Sealant Low Temperature, Refrigeration Units 310 ml Cartridge - No - Alkoxy High Elasticity, Low Modulus, Low Odor 798 1 (2 mm day@ 23 °C), 3 (4 mm days@ 23 °C) Paste -
RS庫存編號 459-0210
製造零件編號6011086
HK$100.46
單位
Transparent Silicone Sealant Glass, Sealing, Waterproof 310 ml Cartridge - No - Acetoxy High Elasticity 781 1 (3 mm day@ 23 °C), 3 (5 mm days@ 23 °C) Paste -
RS庫存編號 258-5941
製造零件編號LOCTITE® SI 5366
BrandLoctite
HK$145.20
單位
Transparent Silicone Sealant Bonding 310 ml Cartridge -60°C No +250°C Acetoxy High Elongation Loctite 5366 5 min Paste Silicone
RS庫存編號 494-102
BrandRS PRO
HK$148.60
單位
White Silicone Sealant Copper, Semiconductor Junction Protection 310 ml Cartridge -40°C No +150°C Elastomer Neutral Cure, Non-Corrosive - 7 (23 °C) days Paste Stearic Acid
RS庫存編號 555-588
BrandRS PRO
HK$53.40
單位
Transparent Silicone Sealant Electrical 100 g Tube -60°C No +180°C Acetoxy, Elastomer Acetoxy Cure - 7 (23 °C) days Paste -
RS庫存編號 283-426
製造零件編號158
HK$216.00
單位
Black Silicone Sealant Bonding, Sealing 75 ml Tube -60°C No +300°C Elastomer High Temperature Silcoset 158 7 (25 °C) h Paste -
RS庫存編號 901-5679
製造零件編號740010650
HK$410.07
單位
White Silicone Sealant Engineering 310 ml Cartridge -60°C No +300°C Elastomer High Temperature, Tack-Free - <12 (3 mm) h Liquid -
RS庫存編號 512-799
BrandRS PRO
HK$83.91
單位
White Silicone Sealant Jointing 310 ml Cartridge -50°C No +100°C Elastomer Low Modulus, Neutral Cure - 7 (23 °C) days Paste -
RS庫存編號 901-5660
製造零件編號740010635
HK$211.84
單位
White Silicone Sealant Engineering 75 ml Tube -60°C No +300°C Elastomer High Temperature, Tack-Free - <12 (3 mm) h Liquid -
RS庫存編號 693-264
製造零件編號2942127
HK$113.22
單位
White Silicone Sealant Firestop 380 ml Cartridge - No - - - Firestop 700 - Paste -
RS庫存編號 901-5672
製造零件編號740010640
HK$196.55
單位
White Silicone Sealant Industrial 75 ml Tube -60°C No +300°C Silicone Elastomer High Temperature and Low Humidity, Tack-Free - 7 (3 mm) h Paste -
RS庫存編號 901-5676
製造零件編號740010645
HK$360.90
單位
White Silicone Sealant Industrial 310 ml Cartridge -60°C No +300°C Silicone Elastomer High Temperature and Low Humidity, Tack-Free - 7 (3 mm) h Paste -
RS庫存編號 529-126
製造零件編號6001570/C05
BrandGeocel
HK$66.58
單位
Transparent Silicone Sealant Asphalt, Glass, Masonry, Metal, Plastic, Stone, Wood 310 ml Cartridge -40°C No +80°C Elastomer High Elasticity, Mildew Resistant All Weather Seal 5 days Paste -
RS庫存編號 901-5694
製造零件編號740010675
HK$276.90
單位
Translucent Silicone Sealant Atmospheric Moisture, Corrosion Sensitive Devices, Electrical & Electronic Applications, Small Circuits and Connectors 310 ml Cartridge -60°C No +200°C Alkoxy, Silicone Elastomer Low Odor, Non-Corrosive, Tack-Free - 36 (3 mm) h Paste Thixotropic
RS庫存編號 561-176
製造零件編號2939126
HK$51.84
單位
Transparent Silicone Sealant Insulation, Pipe Sealing, Sealing, Trunking Sealing 78 g Injector -40°C No +150°C Acetoxy Non-Flammable Geobond Marine 24 (3 mm h@ 23 °C) Paste -
RS庫存編號 423-6758
製造零件編號229293
BrandLoctite
HK$128.25
單位
Transparent Silicone Sealant Sealing 100 ml Tube -60°C No +250°C Acetoxy High Elongation, High Tensile Strength, Shore Hardness Loctite 595 - Paste -
RS庫存編號 113-008
製造零件編號6011048
HK$31.08
單位
Transparent Silicone Sealant Exterior, Sealing 50 ml Tube +5°C No +40°C Elastomer Fungus Resistant, Mildew Resistant SRS - Paste -
RS庫存編號 550-230
BrandRS PRO
HK$105.96
單位
Transparent Silicone Sealant Electrical 310 ml Cartridge -60°C No +180°C Acetoxy, Elastomer Acetoxy Cure - 7 (23 °C) days Paste -
RS庫存編號 901-5705
製造零件編號740010690
HK$737.88
單位
Grey Silicone Sealant Atmospheric Moisture, Corrosion Sensitive Devices, Electrical & Electronic Applications, Small Circuits and Connectors 310 ml Cartridge -62°C No + 316°C Alkoxy, Silicone Elastomer High Strength, High Temperature Adhesive Paste, Non-Corrosive, Tack-Free - 72 (3 mm) h Paste -
RS庫存編號 423-6938
製造零件編號6011030
BrandGeocel
HK$85.06
單位
Red Silicone Sealant Sealing 310 ml Cartridge -40°C No +250°C Acetoxy - Plumba Flue - Putty -