Dowsil 799 Glaze & Go Silicone Sealant Clear 310ml. DOWSIL(tm) 799 EU Glaze and Go Sealant is a one-part neutral curing, low modulus silicone sealant specially formulated for glazing and weathersealing, which provides a white finish on most plastics, including PVCu and polycarbonate profiles and panels.
Excellent product, easy to apply, gives you time to make changes before it goes off completely. I have used many similar silicon products but have found this just right in all aspects, not overpriced either. Recommended