Types of Silicone

Not all silicones are the same! You can spend several thousand pounds on a bathroom refurbishment and the cost of the silicone sealant can be as low as £2. But what is in that tube? Silicones can be generally classed as either Acetoxy or Neutral Cure. Acetoxy cure silicone gives off an acetic acid when curing resulting in pungent vinegar like smell. On the other hand Neutral Cure Silicone is relatively odourless releasing an alcohol during the curing process. Manufacturers like ourselves only recommend the use of Neutral Cure Silicones, as many of the Acetoxy Silicones have too many limitations, often branded as general purpose, with different brands having varying degrees of added solvent. Classi Neutral Cure 100% Silicone is the perfect compliment to our Classi Waterproofing solutions. Only use Classi Neutral Cure 100% Silicone.


Acetoxy Cure

  • Gives off an acetic acid when curing
  • Smells like Vinegar
  • Often marketed as "General Purpose"
  • Often contain added solvents
  • Considerably Cheaper than Neutral Cure

Neutral Cure

  • Gives off an alcohol when curing
  • Relatively Smell Free

Classi only recommend the use of Neutral Cure Silicones, as many of the Acetoxy Silicones have too many limitations, with different brands having varying degrees of added solvent.


Classi Neutral Cure 100% Silicone

For the perfect finish, Classi has introduced its own range of Neutral Cure, Sanitary Grade 100% Silicone. It is a premium low modulus silicone which has been specifically designed to have excellent adhesion and elastomeric properties for sealing joints in the bathroom and kitchen where movement can be expected. This easy to use silicone is practically odourless when curing, is mould and mildew resistant and conforms to ISO11600-F&G-25LM. Classi Neutral Cure comes in White and Clear. We recommend the use of a Neutral Cure Sanitary Grade 100% silicone with our Classi products.

Classi Neutral Cure Silicone