Polychlorinated Biphenyls (PCBs)

Summary of Tools and Methods for Caulk Removal

TOOLS/METHOD	SUITABILITY	ADVANTAGES/DISADVANTAGES	PROTECTIVE MEASURES TO CONSIDER
Mechanical Tools
Utility knife	Universally applicable tool, especially for cutting out elastic and soft caulk together with an electrical joint cutter> Suitable for all smooth joint faces Less suitable for working on projects with caulk of lengths exceeding 100 m Less suitable for very hard caulk Choice of different blades to suit the joint width and depth	Advantages: Short, sturdy blade that is easily exchangeable Handy, low weight No dust development in case of elastic caulk Little dust when removing slightly brittle caulk and cleaning joint faces Gentle treatment of joint faces Disadvantages: Requires great exertion in case of hard caulk Relative low output (linear meters of caulk/hour) Relatively high labor costs	General personal protective measures Construction of a Containment Area enclosure (if dust is generated) Work area decontamination
Ripping chisel	Suitable for breaking out or chiseling hard caulk, especially when working with joint in concave, angled planes Less suitable for joints with a width of less than 5 mm Less suitable for working on projects with caulk of lengths exceeding 100 m	Advantages: Removal of hard and brittle caulk: The cutting edge can be moved along the joint face with greater pressure than a utility knife Low dust development in case of rough joint faces Disadvantages: Quickly dulls when working with rough joint faces made of concrete or other hard materials Possible damage to adjoining structural parts	General personal protective measures Construction of a Containment Area enclosure Dust aspiration at the source when cleaning joint faces as described in Abatement Step 2.
Putty knife/scrapper	Suitable for reworking joint faces with shaving or scraping Suitable for removing loose or crumbling caulk	Advantages: Suitable for rough joint faces Disadvantages: Poor cutting action Small particle debris at the joint faces Longer joints and hard caulk	General personal protective measures Construction of a Containment Area enclosure Dust aspiration at the source when removing loose or crumbling caulk as described in Abatement Step 2.
Bush hammer	Suitable for hammering away hard or well-attached caulk residue on hard, robust areas	Advantages: No heavy dust development Disadvantages: Limited to hard and solid surfaces	General personal protective measures Construction of a Containment Area enclosure Dust aspiration at the source when removing loose or crumbling caulk as described in Abatement Step 2.
Hammer and chisel	Suitable for very hard, brittle, or wide joints > 2 cm	Advantages For very hard caulk Disadvantages Possible damage to structural parts	General personal protective measures Construction of a Containment Area enclosure Dust aspiration at the source when removing loose or crumbling caulk as described in Abatement Step 2.
Electromechanical Tools
Electrical joint cutter with oscillating blade	Universally applicable tool for cutting out hard and soft caulk, especially in combination with a utility knife; suitable for all material types of adjoining structures Less suitable for removing caulk that is difficult to access Not suitable for very hard caulk	Advantages: Short, sturdy blade that is easily exchangeable Handy, acceptable weight Low dust volume Typically low risk of damage to joint faces with careful work Disadvantages: Moderate exertion required; No integrated dust aspiration	General personal protective measures Construction of a Containment Area enclosure Maintain negative air pressure with induced draft fan equipped with High Efficiency Particulate Air (HEPA) filters Dust aspiration at source when removing loose or crumbling caulk as described in Abatement Step 2.
Electrical scraper with exchangeable blades	Universally applicable tool for soft to hard caulk, especially in combination with a utility knife; Suitable for difficult-to-access joint areas in corners and along edges Also suitable for reworking joint faces Not suitable for very hard caulk	Advantages: Lightweight device, handy Low exertion Low dust volume Disadvantages: No integrated dust aspiration	General personal protective measures Construction of a Containment Area enclosure Maintain negative air pressure with induced draft fan equipped with HEPA filters Dust aspiration at source when cleaning joint faces as described in Abatement Step 2.
Needle hammer	On level areas: for broad, shallow dummy joints and connection joints	Advantages: Removal of firmly attached, hard caulk Disadvantages: Higher dust volume; possible damage to adjoining structures	General personal protective measures Construction of a Containment Area enclosure Maintain negative air pressure with induced draft fan equipped with HEPA filters Dust aspiration at source when cleaning joint faces as described in Abatement Step 2.
Jigsaw with exchangeable saw blades	Tool with integrated dust aspiration. Use is limited to deep joints with free space in accordance with blade length Only suitable for cutting out the caulk Not suitable for reworking joint faces Not suitable for difficult-to-access joint areas in corners and along edges	Advantages: Good cutting rate for semi-soft and hard caulk Integrated dust aspiration Disadvantages: Only suitable for joints in vertical planes with open joint backup	General personal protective measures Construction of a Containment Area enclosure Maintain negative air pressure with induced draft fan equipped with HEPA filters Connection of the integrated dust aspiration device to an industrial vacuum with HEPA filters.
Diamond sanding device	Electrical joint cutter with oscillating, diamond-coated cleaning blade and integrated dust aspiration Only suitable for cleaning joint faces	Advantages: Low dust volume compared to angle grinder Integrated dust aspiration Disadvantages: Heat development and gaseous emission production not clarified	General personal protective measures Construction of a Containment Area enclosure Maintain negative air pressure with induced draft fan equipped with HEPA filters Connection of the integrated dust aspiration device to an industrial vacuum with HEPA filters.
Rotary cutting tools	Only suitable for cutting out the caulk Not suitable for reworking joint faces Suitable for difficult-to-access joint areas along edges; not suitable for accessing corners	Advantages: Lightweight device, handy Low exertion Typically low risk of damage to joint faces with careful work Disadvantages: Higher dust volume No integrated dust aspiration	General personal protective measures Construction of a Containment Area enclosure Maintain negative air pressure with induced draft fan equipped with HEPA filters Dust aspiration at source when cleaning joint faces as described in Abatement Step 2.
Chemical-Physical Methods
Dry ice (CO2) blasting	Suitable for gentle reworking of joint faces Suitable for large joint lengths	Advantages: Gentle on the surrounding materials Good cleaning performance (Note: In some cases, the method cannot completely remove caulk) Good performance for large joint lengths Disadvantages: Expensive (especially in combination with high demands for protective measures) Complex requirements for protective measures	Enclosure of the work area with airtight seal, negative pressure and controlled air exchange, dust aspiration at the source Full respirator with fresh air supply and protective suit Noise and ear protection (noise levels range from 85 to 120 dBA, depending on the device)