Promark Caulking Gun 280mm SKU: 370058 MODEL: MASTGUN Error. try again later You've successfully joined the club $ 6 .58 each Available on orders $50 to $1500. More info × Mitre 10 SAvailable at selected stores. Check your local store for details Variants Standard mastic gun designed for the smooth application of sealants on cracks and gaps in homes and offices. Features and benefits Ratchet style gun for greater leverage. Suitable for the application of sealants. Heavy duty.