Silfix HM is a premium quality high modulus, sanitary, acetoxy cure silicone sealant which offers outstanding strength, performance and durability. It is ideal for use in a wide variety of glazing, industrial and domestic applications and is ideal for use in glass/glass joints, shop fronts, kitchens and bathrooms.

Conforms fully to the requirements of EN 15651-1: F-EXT-INT-CC (Class 20LM), EN 15651-2: G-CC (Class 20LM) and EN 15651-3: S (Class XS1). Premium quality, high modulus, acetoxy cure silicone sealant. Provides excellent adhesion to a wide variety of non-porous surfaces. Conforms to ISO 11600 G-25 HM. Tested to EN 15651-1:F-EXT-INT-CC, EN 15651-2:G-CC and EN 15651-3 S.


Ideal for glass to glass joints, shop fronts and in areas of high humidity, such as bathrooms and kitchens. Contains a powerful fungicide, which makes it ideal for use around baths, basins and ceramic tiles.

  • Premium quality
  • High gloss
  • Excellent adhesion
  • Good performance across a wide range of temperatures


Application temperature range: +5°C to +40°C Curing rate: Cures at a rate of 3mm in 24 hours at 23°C @ 55% RH. Lower temperatures and drier conditions will result in a slower rate of cure. Shelf life: 24 months. Skinning time: Skin forms after approximately 15 minutes at 23°C @ 55% RH. Working time: Approximately 10 minutes depending on conditions.


Joint design: Please consult the Technical Information Sheet entitled ‘Joint design for cartridge based products’ prior to application.

Surface preparation: All surfaces must be clean, dry and free from frost, grease and loose materials. Apply primer if required. In situations where an especially neat finish is required, use masking tape to cover the face edges of the joint and remove immediately once tooling has been completed. Cut the tip of the screw thread off the cartridge and screw on the nozzle. Cut nozzle to correct diameter for joint size. Apply using a skeleton or powered gun into the joint ensuring good contact with surfaces. In deep joints, the use of Hodgson Backing Rod is essential to ensure good joint formation. 


Silfix HM - Product data sheet

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