All FrogTape painter’s tapes are treated with patented PaintBlock Technology, a super-absorbent polymer that All FrogTape brand painter’s tapes are treated with patented PaintBlock Technology, a super-absorbent polymer that reacts with the water in emulsion paint and instantly gels to form a micro-barrier that seals the edges of the tape, preventing paint bleed and the need for touch-ups. The results are crisp, clean paint lines the first time. The signature FrogTape canister protects your tape edge not only against moisture, but nicks and dents that can ruin the tape edge during storage.reacts with the water in emulsion paint and instantly gels to form a micro-barrier that seals the edges of the tape, preventing paint bleed and the need for touch-ups. The results are crisp, clean paint lines the first time. The signature FrogTape canister protects your tape edge not only against moisture, but nicks and dents that can ruin the tape edge during storage.