Proven floorboard gap filler designed to reduce cold draughts and save money. Potential savings up to 40 GBP per room per year on energy bills and reduce CO2 contribution by around 110kg. Standard, 8mm (on a 40m roll) to fill gaps of 3 - 7mm. Also available in additional sizes to fill all gaps: thin for gaps less than 3mm, thick for gaps 10 to 12mm. Flexible properties allow for easy fitting into floorboard gaps, requires no adhesive or specialist skill. Easy-to-use applicator included.