Firstcall Black-out Door Foam

"This is easy to apply and pretty sticky as a result not so easy to reposition. When applied to door facings on four edges it provides a complete block to light . The significant thing to consider is how it’ll affect door closure. It’s necessarily dense stuff which provides quite some resistance to the final few millimetres of closure required to achieve absolute blackout. In my case it required very slight filing down of the latch rebate to allow it to catch the door lock. It’s all a matter of physics but this stuff is great and essential. Secondary curtain around my door is no longer required."