Kufotokozera kwa zida: Wowuma wa Drum amagwiritsidwa ntchito pa pret - kuwotcha ufa wolimba wa Ferrite, ndipo amathanso kugwiritsidwa ntchito mu simenti, metallingo, mankhwala ena. Zipangizozi zimapangidwa ndi kilodi yayikulu komanso chipangizo chogwiritsira ntchito, ozizira
WP ndi mlingo wa mankhwala ophera tizilombo, penart filler (makamaka bentonite, kaolin, etc.) ndi zowonjezera zina zowonjezera, zomwe zimasakanizidwa molingana ndi ufa. Kuchokera pa mawonekedwe, osasiyana ndi ufa, koma chifukwa cha