What is added to wallpaper paste to control bedbugs? - briefly
A residual insecticide—commonly a pyrethroid or a silica‑based powder—is mixed into the wallpaper paste to kill bedbugs. This additive continues to act after the paste dries, providing long‑term control.
What is added to wallpaper paste to control bedbugs? - in detail
Wallpaper adhesives can be formulated with specific insecticidal additives to suppress bed‑bug populations during installation. The most common classes of chemicals incorporated are:
- Pyrethroid compounds – synthetic analogues of natural pyrethrins, such as permethrin, bifenthrin or cyfluthrin. They act on the nervous system of insects, causing rapid paralysis and death.
- Neonicotinoid agents – examples include imidacloprid and acetamiprid. These substances bind to nicotinic acetylcholine receptors, disrupting nerve transmission.
- Insect growth regulators (IGRs) – methoprene and hydroprene interfere with molting processes, preventing larvae from reaching maturity.
- Silicone‑based desiccants – diatomaceous earth or silica gel particles abrade the cuticle, leading to dehydration.
Formulation guidelines require that the active ingredient be uniformly dispersed in the paste at concentrations ranging from 0.1 % to 0.5 % by weight, depending on the product’s label and intended exposure level. The adhesive must retain its bonding properties; therefore, manufacturers select agents with low viscosity and compatibility with cellulose‑based binders.
Application protocols specify:
- Mix the paste thoroughly to achieve even distribution of the insecticide.
- Apply the adhesive to the wall surface using a trowel or roller, avoiding excessive buildup that could dilute the active ingredient.
- Allow the wallpaper to dry completely, typically 24–48 hours, before occupants return to the area.
Safety considerations include wearing protective gloves and masks during mixing, ensuring adequate ventilation, and adhering to the permissible exposure limits stated on the product safety data sheet. Residual activity can persist for several weeks, providing ongoing protection against re‑infestation while the wallpaper remains in place.