Opaque films. These films allow none overy little light through.
Picture of SOLYX: SXWF-BO Blackout. 152cm wide
SOLYX: SXWF-BO Blackout. 152cm wide Black opaque polyester. 1.5 mil film. Very easy to install. Priced perunning meter. Ordethe length (quantity) needed x 152cm wide.
 
 
Picture of SOLYX: SXWF-WO Whiteout. 152cm wide
SOLYX: SXWF-WO Whiteout. 152cm wide White opaque polyestefilm. Priced perunning meter. Ordethe length (quantity) needed x 152cm wide.