Richard Williams have a range of intumescent strips, available in both white and brown, specifically designed for your protection. The intumescent strip swells up under heat and fills the voids between two surfaces (the door and door frame for example) creating a fire seal. The dictionary definition of intumescent means “to swell, or become swollen”. As a product any material which expands under the single introduction of heat may be called intumescent, however there is a lot more to the technology than just this reaction – the intumescent strip swells up under heat and fills the voids between two surfaces (the door and door frame for example) creating a fire seal.
Our intumescent strips come from leading brand Norseal, who’s products are tested to BS 476 part 20:22. The strips have a moisture resistant intumescent suitable for use in wet or dry areas on a range of single and double leaf doorsets. Fixing is via high tack acrylic backed self adhesive tape as standard. Exceptionally sharp edges lead to visually appealing sight lines and easy installation.
Probably the most under rated feature of the Norseal intumescent strips is the compression gap. This is totally unseen being placed at the bottom of the strip deep in the timber groove allowing the product to slightly give when inserted into a tight gap. Generally the industry cannot supply undersized strip products.