Geocel - Marine Silicone Sealant 310ml Cartridge

Geocel - Marine Silicone Sealant 310ml Cartridge

£18.09    (Inc. UK VAT @ 20%)(£15.08 Exc. VAT)

Geocel Marine is a silicone rubber sealant that fills and caulks gaps, joints and cracks around the boat

Also available in a 78ml injector.

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Product Information

Geocel Marine Silicone Features

  • One component, easy to apply and tool
  • Excellent adhesion to glass
  • High modulus
  • Fast tack free and cure time
  • Safe for fish when fully cured
  • Cures to form a permanently flexible watertight seal.

Geocel Marine Silicone Principle Applications

Geocel Marine Silicone is suitable for the following sealing applications:

  • Sealing around hatches and port holes
  • Insulating electrical connectors
  • Locking nuts and bolts against vibration
  • Sealing trunking
  • Sealing pipework
  • In-situ gaskets for water pumps and exhaust systems
  • Creating watertight joints throughout

Geocel Marine Silicone Specifications

Manufactured under ISO 9001

Form Smooth void free viscous paste
Storage life Stored below 25°C, in original containers
310ml cartridges - 27 months
78g Injector - 18 months
Specific Gravity 1.02
Colours White, Clear, Black
Base Acetoxy silicone
Hazardous Ingredients Non-hazardous
Flammability Non-flammable
Application Temperature 5°C to 35°C
Temperature Range -40°C to 150°C
Skin Time 20mins at 23°C and 50% relative humidity
Cure Time 3mm per 24 hours at 23°C and 50% RH
Hardness 20-25 Shore A
Movement Accommodation +/-20%
Tensile Strength 2.3 MPa

Surface Preparation

Ensure all surfaces are clean, dry, sound and free from grease. To obtain good adhesion, clean surfaces with Geocel Surface Cleaner before applying the sealant. Areas adjacent to the joint should be masked with tape to prevent contamination of substrates and ensure a neat sealant line. Where there is a large gap, it is advisable to pack the joint with tissue paper.


Replace nozzle and cut tip to required width at a 45° angle. Ensure that the adhesive/sealant makes full contact with both sides of the joint. Cut the cartridge nozzle at an angle to ease control of the sealant flow. The nozzle should be cut according to the width of the joint. As the sealant extrudes from the cartridge, draw the cartridge towards you along the joint.


Tooling should be carried out within five minutes of sealing, before a skin forms. This can be achieved by using the back of a spoon. When tooling, it is important to ensure a good contact between the silicone and the substrate. Masking tape should be removed immediately after tooling.


Excess adhesive/sealant may be cleaned off tools, clothing and skin using Geocel® Universal Wipes.


Do not use on substrates that can bleed oils, solvents or plasticisers. Product releases acetic acid during cure, which can corrode sensitive metals such as copper, brass and lead.

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