Protos FIL

Protos Fil

High strength, fire retardant, para-aramid thread

Coats Protos Fil is a 100% para-aramid continuous filament sewing thread that is fire retardant, retaining its strength even after heat ageing up to 400°C for 30 minutes. A special coating is applied to the fibre in order to maximize sewing performance even in the most exacting operations.

Protos Fil meets both American Fed 16 CFR 1633 Mattress Burn Test and Military AA 55220 specification requirements.

Due to a unique and innovative dyeing process, Protos Fil is available in a range of colours.

Discover how Protos Fil can transform your products. Find out more and download our product information sheet or contact one of our experts.

See the whole brand family


Since conditions and applications vary considerably in the use of a product, the customer and/or user should assure herself or himself that the product meets end customer requirements and is suitable for the intended end use. Coats accepts no liability for unsuitable or improper use or application of products.

Information provided above is based on current averages and should be taken only as indicative. Coats accepts no liability for the preciseness and correctness of the information provided.

Product information sheets are updated from time to time, please be sure you are referring to the most recent publication. Coats supports customers with advice on individual applications on request; if you have any questions or concerns, please contact us.