Trust the world’s best gasket.
There are gaskets. Then there's Q-Lon - known as the 'rolled in gasket', it has excellent compression recovery of 99%, giving constant height at corners for improved weathering and does not produce weld sprue.
All our windows feature the innovative Q-Lon weather seals. Offering exceptional performance over a wide temperature range, they don’t shrink or stretch. Instead they retain their original shape year after year to maintain an excellent weather seal.