ROUNDEX

It is not adherent to the sealant,therefore allowing the putty to move elastically sideways without tension at the bottom.
Very low water absorption thanks to its closed cell structure.
Good chemical strength against solvents and chemical products.
Very good adaptability,handling and easy fixing.
It provides a convex surface at the bottom of the seal.
Very easy and economical to place and,in exchange,it provides control over the amount of putty used
and the quality and final mix of the seal.