Stelmax 1965 gap filler and sealant are an easy-to-apply gap filler to form maintenance-free, strong joints.  For a larger gap, you could try the Stelmax 1961 gap filler.

Key features:

• Suitable for for sealing and joining PVC and PVCu to itself and most porous substrates such as brickwork and timber.
• Product will skin rapidly to prevent penetration by foreign bodies of the product surface and when fully cured will give a water-resistant colour-fast seal.
• Exhibits similar resistance to weathering, UV and chemicals when dry comparable to good quality rigid PVC

Application:

• 1961 is ideally suited to providing a seal between the window frame and surround

Storage and shelf life:

• 6-month shelf life
• Product should be stored at moderate temperatures, where product is subjected to severe cold periods it should be immersed in warm water to allow it to return to it's standard consistency